|Radian's Symphonic - Most
Innovative Software at FMS|
Editor:- August 18, 2015 - Radian Memory - which
recently emerged from stealth mode - today
it had received a best of show award at the
Flash Memory Summit for
"Most Innovative Software Technology".
This was for its
software product Symphonic -
designed for its new 2.5" NVMe SSDs - which replaces the traditional FTL
with a 3rd generation approach - described by the company as "Cooperative
Flash Management" - which partitions data movement responsibility
between the controller in the SSD and the host CPUs and which enables data
to be moved around the flash array under host control without needing to be
read back into main system memory.
is the hyper convergence market over indulging in hype?
August 18, 2015 - some interesting comments about the reputation inflationary
soothsayers in the hyperconverged systems market surfaced in a
blog by Chin-Fah
Heoh, StorageGaga - who
says - among other things - "Hyper Converged vendors spend a lot of their
resources and marketing on hyping up performance, and little on everything else."
Our products are intentionally sold software-free - says Savage IO
July 28, 2015 - "Our products are intentionally sold software-free, to
further eliminate performance drains and costs caused by poor integration,
vendor lock-in, rigidly defined management, and unjustifiable licensing schemes"
says Savage IO
its SavageStor - a 4U
server storage box with "more lanes of SAS than anyone else".
NexGen decouples from Fusion-io accelerator juice with NVMe
Editor:- June 30, 2015 - As previously signaled - NexGen Storage has
decoupled itself from relying on SanDisk's PCIe SSD
product line in its hybrid storage arrays with the
today that NexGen has introduced NVMe readiness as an update in its software
services. This paves the way for expanding the systems product line with a
wider range of
3rd party internal SSD accelerators with different
Hedvig has amassed $30 million to start fixing broken SDS market
June 1, 2015 - Hedvig
- which operates in the SDS market - today
an $18 million Series B funding round (bringing the company's total funding to
date upto $30 million).
Hedvig's founder - Avinash Lakshman -
who is credited with building some of the most successful distributed systems in
the world, including Amazon Dynamo, the foundation of the NoSQL movement, and
Apache Cassandra for Facebook said - "We've identified the potential in a
broken and fragmented storage market, and are not only looking to bring
software-defined storage mainstream, but fundamentally change how companies
store and manage data."
Caringo gets patent for adaptive power conservation in SDS pools
May 19, 2015 -
it has obtained a US patent for adaptive power conservation in storage
clusters. The patented technology underpins its Darkive storage management
service which (since its
in 2010) actively manages the electrical power load of its server based
storage pools according to anticipated needs.
"The access patterns
and retention requirements for enterprise data have changed considerably over
the last few years to a store-everything, always accessible approach and storage
must adapt," said Adrian
J Herrera, Caringo VP of Marketing. "We developed Darkive to help
organizations of any size extract every bit and watt of value while keeping
their data searchable, accessible, and protected."
new power fail safe file system for tiny memory IoT
May 5, 2015 - Datalight
a preview version of
Edge, a power
fail-safe file system for FreeRTOS
which allows developers building IoT devices to reliably store and quickly
access data in embedded
SSDs. It requires as little as 4KB of RAM and 11KB of code size.
a file system which met the high reliability standard set by our (high
Nitro and could fit into tiny microcontroller based systems presented a
challenge and I love a challenge," said Jeremy Sherrill,
architect of file systems for Datalight. "Reliance Edge offers a rich set
of features in a highly efficient architecture."
Reliance Edge can
work with a broad array of storage mediaincluding NOR and NAND flash,
eMMC, SD/MMC, NVRAM,
USB storage, and
PATA) SSDs. Datalight
plans to release new pre-ported kits for other small-kernel OSes over the
software is key to enterprise flash consolidation
April 21, 2015 - In an new article today on StorageSearch.com I look at
drivers, mechanisms and routes towards consolidation in the enterprise SSD
systems market along with some other outrageous and dangerous ideas.
now realize that in their own self interest they have much to gain from
abstracting the benefits they get away from the diverse feature sets of any
single supplier towards a minimalist set of common must-have features which will
satisfy all their needs while giving them independence from failed or greedy
suppliers." ...read the
SanDisk shows the softer under belly of flash
March 12, 2015 - SanDisk
already attracts more interest in its software from StorageSearch.com readers than any
ISV in the SSD software space - something I recently disclosed in the
Q4 2014 edition of
the Top SSD Companies.
Why so much interest?
It's because they've got a
lot of enterprise software.
(Partly due to having
acquired a lot
of software rich companies.)
In a recent press release about
SanDisk's latest contribution to open source - to benefit
Ceph storage - I saw an
interesting list of other areas they have done work on too.
- The Android OS stack for mobile devices
- The Linux kernel for memory management and file system to enable better
performance with flash
- The Android Real Path Storage library, an Apache licensed project
maintained by SanDisk, that enables application developers to use external
memory like SD cards in their Androids
- SCST, a GPL-licensed SCSI target software stack that is maintained by
It sure takes a lot of software to make
flash memory work with
the non flash world. It's much more than the low level
care stuff you'd
expect in flash
- and Enterprise applications like Cassandra, MySQL, Hadoop and others to
optimize them for use with SanDisk flash technology.
Part of this complexity stems from the
inherent in flash
R/W IOPS - and the problems of masking this fact - using disguises and
ruses - from legacy software which was originally created for symmetrical
DRAM. But another complex
motivator in the software plot is to do with data granularity and
Before you get too
about good old DRAM, however, its reputation has been
It seems that when you scrutinize any
chips which have very small
internal geometries - then you see that bad things happen. It's just that we've
learned to expect it with flash (due to all those battles between
nice and naughty
enterprise flash) and we always expected better behavior from DRAM. So
when such problems hit good old reliable DRAM (as they
about once every 10 years) everyone is surprised.
FalconStor shows why it has taken so many years to launch an
SSDcentric next software thing
Editor:- February 19, 2015 -
You might think there are enough SDS companies already - but SSDcentric data
architectures are pulling system solutions in
directions - so until the dust settles and the landscape looks clearer -
there are plenty of gaps for new companies to enter the market.
most significant this week was FalconStor - who
a new SSDcentric storage pool redeployment and management platform called
FreeStor - which the
company says works across legacy, modern and virtual environments.
says - "The heart of FreeStor is the Intelligent Abstraction layer. It's a
virtual Rosetta Stone that allows data - in all its forms - to migrate to,
from and across all platforms, be it physical or virtual."
They've posted a good
video which describes it all.
FalconStor's natural partners are
enterprise SSD systems vendors and integrators who have good products but who
don't have a complete (user environmentally rounded) software stack.
comments:- For 4 years FalconStor gave me the impression of a storage
software company which didn't know what it wa going to do with the SSD market -
despite having a base of thousands of customers in the enterprise storage
FalconStor's delay can now be explained. They were
studying what needed to be done - and it took a lot of work.
want to understand who else is offering a product concept which is similar in
vision to FalconStor's FreeStor - I'd say
Although due to a difference in ultimate scaling aspirations and markets - I
would say that FalconStor's product is lower end and currently more accessible.
Part of the reason being that FalconStor already has a customer base for pre SSD
era software - which they are hoping to convert incrementally.
$34 million funded SDS company Springpath emerges from stealth
February 18, 2015 - Springpath
emerged from stealth with these related
server based data platform
priced from $4,000 per server per year.
A distribution agreement with
Tech Data who will offer Springpath's
software preloaded onto servers.
funding from investors
Sequoia Capital, New Enterprise Associates (NEA), and Redpoint Ventures
still more volatility ahead in enterprise SSD markets
January 21, 2015 - "SDS (software defined storage) is a good example of
an illusory market idea for comfortably bringing technologies together which due
to its many incompatible incarnations which will probably rip many business
That's one of the things I say in my new blog -
what kind of SSD world
2015? - on
not saying that SDS isn't important - and in the same blog I point out that
(due to their inherent flexibility) an installed base of server based SSD
storage systems will be among the few types of enterprise flash products being
marketed today which will still be reusable when many other so called all flash
arrays (which have been designed for backwards looking compatibilities) get
sidelined and orphaned by future generations of SSD everywhere software. But
we're still a long way from having stable and enduring reference platforms for
the enterprise SSD age. ...read
Primary Data - one of the best known enterprise software companies
in 2016-2017 - emerges from stealth
Editor:- November 19, 2014
- Primary Data
- the most ambitious storage software startup I have ever encountered - today
emerged from stealth mode - with 2 announcements.
more in SSD news
- 1st announcement
that Steve Wozniak
has joined the company as Chief Scientist.
Wozniak who cofounded
1976 - elevated the general
visibility of fledgling Fusion-io
when he joined that company in the Chief Scientist role
The impact of this was assessed and captured in a
2011 blog by Woody Hutsell
- who at that time was working at erstwhile enterprise SSD competitor -
TMS. Woody wrote at
that time (2011)...
"I used Google trends data to see if there was
an inflection point for Fusion-IO and I found it. The inflection point was their
hiring of Steve Wozniak. What a brilliant publicity move... I spent a lot of
time trying to figure out how to create a similar event at TMS. I thought if we
could hire "Elvis" we would have a chance."
November 2014) Primary Data's cofounder - Rick White said...
"With Woz on the team along with Lance and
we now have the band back together, and I'm amped to be reunited at Primary
Enmotus FuzeDrive software - now available
November 4, 2014 - Micro-tiering within the server box - between the lowest
possible latency persistent memory (such as
flash backed DRAM
DIMMs from Viking),
then up a level to SATA
SSDs and finally to hard
drives - gives users materially different performance and cost
characteristics to merely caching between those devices when they are used in
a hybrid storage
That's the message behind the
about the general availability of the company's
server (SSD software)
for Windows and Linux - in which (unlike simple server based cache based
solutions) - FuzeDrive treats the SSD as primary storage and so "all
reads and writes to the hot data occur at full SSD speeds".
SSDs are becoming
in some cases" said Marshall
Lee, CTO and co-founder of Enmotus. "As a result, newer classes of
storage devices continue to appear that can take advantage of higher performance
busses inside servers, NVDIMMs
being a great example."
McObject expands reach of in memory database for serious embedded
Editor:- October 28, 2014 - First 2, then 3 and
finally - 4 interesting things caught my eye in
news about version 6.0 of
eXtremeDB - an in-memory database system from McObject
- Data compression. This release adds data compression for both in-memory
and on-disk databases. Once upon a time compression was a value add feature in
some products - but now in the SSD age when compression is almost latency free
- it has become a must-have on the feature list - especially for embedded
- Avionics platform support. This upgrade adds compatibility with
River Systems' VxWorks 653 COTS platform for delivering safety-critical,
integrated modular avionics applications.
- More flexible transaction scheduling. Applications using eXtremeDB's
multiple-user, single-writer transaction manager can override the default FIFO
scheduling policy within priority levels to favor either read-only or read-write
""Demand for distributed
query processing cuts across market segments, but is especially relevant to the
automation and control field, where eXtremeDB is historically strong"
said McObject CEO and co-founder Steve Graves.
- Distributed query processing support. eXtremeDB partitions a database and
distributes query processing across multiple servers, CPUs and/or CPU cores -
which can accelerate performance.
SSDs, military SSDs,
Efficiency is important for web scale users - says Coho
October 9, 2014 -
as a file system - a web scale case study - a new blog by Andy Warfield , cofounder
and CTO - Coho Data
- made very interesting reading for me - as much for revealing the
authoritative approach taken in Andy's systematic analysis - as for the object
of his discussion (Facebook's storage architecture).
It reveals useful
insights into the architectural thinking and value judgments of Coho's
technology - and is not simply another retelling of the Facebook infrastructure
it you may get different things out of it - because it's rich in raw
enterprise ideas related to
dark matter users.
All of which makes it hard to pick out any single quote. But here are 2.
- re -
match between enterprise products and user needs
says - "In the past, enterprise hardware has had a pretty hands-off
relationship with the vendor that sells it and the development team that builds
it once it's been sold. The result is that systems evolve slowly, and must be
built for the general case, with little understanding of the actual workloads
that run on them."
There are many more I
could have chosen. ...
read the article
- re efficiency
Warfield says - "Efficiency is important. As a rough approximation, a
server in your datacenter costs as much to power and cool over 3 years as it
does to buy up front. It is important to get every ounce of utility that you
can out of it while it is in production."
We need new software abstractions to efficiently handle
persistent enterprise memory - says SanDisk
Editor:- October 3,
2014 - New enterprise software abstractions are needed in order to
those unruly developments in flash,
And laying the
framework for those ideas - along with some practical suggestions for where
applicable solutions might be coming from - is the theme of a recent blog -
Emergence of Software-Defined Memory - written by Nisha Talagala,
Fellow at SanDisk
- who (among other things) says:-
"We're seeing excitement build
for a new class of memory:- persistent memory - which has the persistence
capabilities of storage and access performance similar to memory.
"Given this richness of media technologies, we now have the
ability to create systems and data center solutions which combine a variety of
memory types to accelerate applications, reduce power, improve server
consolidation, and more.
"We believe these trends will drive a
new set of software abstractions for these systems which will emerge as
software-defined memory a software driven approach to optimizing memory
of all types in the data center." ...read
See also:- are you ready to
rethink enterprise DRAM architecture?
Microsoft's SSD-aware VMs - discussed on InfoQ
September 24, 2014 - There are now so many
software companies that keeping track of them all is a little like tallying
2.5" SSD makers -
a tedious chore -which in most cases isn't worth the bother.
- SSD-centric software
important - and some vendors are more important than others - despite having
been latecomers in the
One such company is Microsoft.
news story today - Microsoft
Azure Joins SSD Storage Bandwagon on InfoQ
- discusses Microsoft's D-Series SSD-aware VMs - and places this in the context
of other products from well known sources.
The blog's author - Janakiram MSV says "One
important aspect of SSD based VMs on Azure is that they are not persistent. Data
stored on these volumes cannot survive the crash or termination of virtual
machines. This is different from both Amazon EC2 and Google Compute Engine,
which offer persistent SSDs. On Azure, customers have to ensure that the data
stored on the SSD disks is constantly backed up to Azure blob storage or other
HGST announces 2nd generation clustering software for FlashMAX
Editor:- September 9, 2014 - HGST today
a new improved version of the
clustering capability previously available in the
PCIe SSD product line
acquired last year from Virident.
allows clustering of up to 128 servers and 16 PCIe storage devices to deliver
one or more shared volumes of high performance flash storage with a total usable
capacity of more than 38TB.
HGST says its Virident HA provides a "high-throughput,
low-latency synchronous replication across servers for data residing on FlashMAX
PCIe devices. If the primary server fails, the secondary server can
automatically start a standby copy of your application using the secondary
replica of the data."
For more details see -
Virident Software 2.0 (pdf)
Editor's comments:- This
capability had already been demonstrated last year - and
ESG reported on the
technology in January
But at that time - the clustering product called vShare -
was restricted to a small number of servers - and the data access fabric was
restricted to Infiniband
With the rev 2.0 software - the number of connected devices has
increased - and users also have the lower cost option of using
Ethernet as an alternative
Maxta invests in Intel
Editor:- August 19, 2014 - In
May 2014 we
learned that Intel
had invested in Maxta.
And this week we learned that Maxta has reciprocated that favor by investing in
More strategically than with mere money - Maxta's
yesterday - is in the form of a reference architecture - cored on Maxta's
MxSP software (SSD ASAP software)
which provides an easy to support set of solutions preconfigured for Intel
servers and Intel SSDs.
Maxta says its MaxDeploy Reference Architecture
offers the framework of a repeatable and standard deployment model - which
provides its customers "ease of ordering and predictability" - and
which mitigates the risk of hardware or software compatibility issues, while
simplifying and shortening deployment time and training.
solution set will be demonstrated next week at
an update on Atlantis (Software-Defined Storage)
July 14, 2014 - Atlantis
on the state of the company he founded in 2006 and which has already sold over
580,000 licenses - CTO, Chetan Venkatesh
said - "Atlantis was started with a vision of a future where intelligent
and agile Software solved the most important, complex and challenging problems
of storage hardware. In our view, storage is not a hardware problem, but that
hardware is the problem and to solve that you need intelligent software that
disrupts the current paradigm of expensive and proprietary SAN & NAS."
- On a year-over-year basis Atlantis grew 1H bookings 80%
SanDisk extends the reach of its SSD software platform
July 8, 2014 - 2 weeks ago
a new enterprise software product -
ZetaScale - designed
to support large inmemory intensice applications.
I delayed writing
about it at the time - until I learned more. But now I think it could be one of
the most significant SSD software products launched in 2014 - because of the
freedom it will give big memory customers (in the next 2-3 years) about how
they navigate their tactical choices of populating their apps servers with
low latency flash SSD hardware.
what is ZetaScale?
says - "ZetaScale software's highly parallelized code supports high
throughput for flash I/O, even for small objects, and optimizes the use of CPU
cores, DRAM, and flash to maximize application throughput. Applications that
have been flash-optimized through the use of ZetaScale can achieve performance
levels close to in-memory DRAM performance."
ZetaScale is SSD
agnostic. "ZetaScale is compatible with any brand of PCIe, SAS, SATA, DIMM
or NVMe connected flash storage device, providing customers the ability to
choose, avoiding hardware vendor lock-in."
I was curious to see
how this new product - which is a toolkit for deploying flash with tiering to
DRAM as a new memory type - fitted in with other products - from SanDisk and
from other vendors which also operate in this "flash as a big
memoryalternative to DRAM" application space .
So I asked
SanDisk some questions - and got some interesting answers.
- Where does the ZetaScale product come from?
ZetaScale builds upon our
acquisition technology for additional use cases and flash deployment models.
ZetaScale allows any developer to better tune their applications for
flash-based environments, no matter which vendors hardware or interface is being
leveraged. Thus, ZetaScale represents a major step forward in our vision of the
flash-transformed data centerempowering software developers to scale and
enhance their applications to meet today's big data and real-time analytics
demands, while lowering TCO.
- How much commonality is there between ZetaScale and FlashSoft product
ZetaScale and FlashSoft software are complementary and
FlashSoft provides direct-attached flash-based
caching for NAS and SAN devices, with the goal of improving performance for
unmodified applications running on a server.
software provides a flash and multi-core optimization library that applications
can integrate to allow them to achieve 3x times the performance
improvement from flash alone.
Both ZetaScale and FlashSoft software
provide their benefits in bare metal and virtualized environments
- Does ZetaScale support ULLtraDIMM?
Yes. The software is compatible with any brand of PCIe, SAS,
SATA, DIMM or NVMe connected flash device, enabling users to avoid vendor
lock-in. However, the software does not get embedded into any SSD.
Editor's comments:- overall I'd have to rate SanDisk's -
ZetaScale as one of the most significant SSD software products launched in 2014.
- How would ZetaScale fit into a future SanDisk product line which also
SanDisk cannot comment on open M&A activity. As usual, all
planning surrounding the product portfolio and roadmap will begin following the
close of the acquisition.
From a technical point of view - it's a toolkit which will enable
architects of SSD apps servers with very large in memory databases to
decouple themselves fromdeep dives into specific low latency SSD products.
Instead of gambling on whether they should exploit particular features which
come with particular low latency SSDs - they can instead use ZetaScale as the
lowest level of flash which their apps talk to. And that will change markets.
although SanDisk didn't want to comment on how this would be positioned against
Fusion-io's VSL - it's
undeniable that in some applications it does compete today.
wouldn't be surprised to see - a year after the acquisition (if it goes ahead)
ZetaScale could be useful as a way of introducing new customers to the
ioMemory hardware environment - without those customers having to make a hard
commitment to the rest of Fusion-io's software.
And - looking at the
SSD market - it also means that SanDisk software might be a safer standard
for future customers of any DDR4 or HMC SSDs which might emerge from competitor
Micron which - unlike
SanDisk - hasn't demonstrated yet any strong ambitions in the
SSD software platform
What do you get when you add Fusion-io's software to SanDisk?
June 17, 2014 - I discussed some of the possibilities in my blog yesterday in
SSD news - following the
announcement that SanDisk
has agreed to acquire Fusion-io.
say hello to CacheIO
Editor:- June 10, 2014 - CacheIO today
announced results of a
benchmark which is
described by their collaborator Orange
Silicon Valley (a telco) as - "One of the top tpm benchmark results
accelerating low cost iSCSI SATA storage."
CacheIO says that the 2
million tpm benchmark on CacheIO accelerated commodity servers and storage
shows that users can deploy its flash cache to accelerate their database
performance without replacing or disrupting their existing servers and storage.
Editor's comments:- The only reason I mention this otherwise
me-too sounding benchmark is because although I've known about CacheIO and
what they've been doing with various organizations in the broadcast and telco
markets for over a year - I didn't list them on StorageSearch.com before.
was partly because they didn't want me to name the customers they were working
with at that time - but also because with
SSD caching companies
becoming almost as numerous as tv stations on a satellite dish - I wanted to
wait and see if they would be worth a repeat viewing. (And now I think they
Decloaking hidden segments in the enterprise
May 28, 2014 - StorageSearch.com
today published a new article -
hidden segments in the enterprise for rackmount SSDs
Some of the
world's leading SSD marketers have confided in me they know from
their own customer anecdotes that there are many segments for enterprise
flash arrays which aren't listed or even hinted at in standard models of
the enterprise market.
Many of these missing market segments don't
even have names.
The glut of new flavors in SSD software - mostly
boldly promising new architectures but sometimes with a better plea
bargain for legacy - is one of the biggest segment multiplying factors.
OCZ betas the next incremental release of its SQL accelerator
Editor:- April 10, 2014 - OCZ today announced it's
inviting enterprise SSD users to participate in
1.5 Beta Program for the next release of its
SQL Accelerator software.
OCZ says - ZD-XL 1.5 enables DBAs to
unleash the full power of SQL Server 2014 features, such as flash Buffer Pool
Extension (BPE) support, that enables database pages to be accessed faster by
loading them directly from flash.
Fusion-io demonstrates life and capacity amplification effects
of combining 2 software ingredients
Editor:- April 2, 2014 - In a
demonstration this week Fusion-io showed the
combined advantages of using NVM compression in conjunction with its Atomic
Writes APIs in SkySQL environments. The results indicate that:-
- 2x as much data can be stored on the same flash media - while
giving similar performance and latency to the uncompressed case with legacy
comments:- compression has been used as a secret invisible
helper inside enterprise flash SSD systems (and as a way to speed up
performance and housekeeping functions such as garbage collection) starting in
2007 with MFT
flash management software from
- using compression and the new APIs - reduces write traffic and improves
endurance limited operating life by a factor of 4x
2009 onwards -
invisible compression speedup and
boosting became widely adopted in the industry - as they were both intrinsic
parts of every SSD
controller shipped by SandForce.
WhipTail was the first
enterprise SSD array vendor I knew of to offer inline time compression as
an explicit feature which users could turn on or off - to increase usable
virtual capacit. That was in
- and James
Candelaria (who at that time was WhipTail's CTO) mentioned this as an
attribute in his
for StorageSearch.com readers in September 2010.
However, in a later
conversation (January 2012) with Cameron Pforr
(who at that time was WhipTail's President and CFO) - Cameron told me they
were no longer emphasizing compression because it led to latencies which were
too long to be competitive - and instead they were focusing on performance.
Since those days many leading SSD array makers have used compression
to offer tactical advantages in their products - particularly in cost sensitive
markets like iSCSI. And
compression and more efficient software are just some of many ingredients I
identified in last year's article
thinking inside the SSD box.
To sum up - Fusion-io's
demonstration this week simply confirms what anyone who knows their product line
well would have already expected.
compression - editor mentions on StorageSearch.com
VMware enters the SSD market
March 6, 2014 - With
the launch of its
Virtual SAN - VMware has at last
joined the crowding SSD
software ecosystem as a lead SSD player rather than (as before) in a
subordinate role (as the
dancing partner - a bit like dancing with your uncle or aunt at the wedding
disco) which was the case before in
of acceleration compatibility stories narrated by other SSD companies.
version 1.0 is an SSD
ASAP (hybrid virtualizing appliance) - which supports 3-8 server nodes. The
company says that "support for more than 8 will come later." ...read the
Editor's comments:- first impressions? It's
late and doesn't look great (in features). But it will probably be deemed
adequate for many users starting down this road.
Before dismissing it
entirely (as some commentators and competitors have already done) let's
remember that when LSI
entered the SSD market in
January 2010 -
it was the "163rd company to enter the SSD market". And look
where they are now.
late to market doesn't count as a mortal sin in the SSD marketing lexicon
right now because
mover advantage (pdf) assumptions aren't valid in this phase of the
more comments re VSAN
customers who had the opportunity to participate in the VSAN beta told us that
in most cases, (our) Maxta MxSP performs better" - said competitor Yoram Novick,
founder Maxta in his blog
Storage the Devil is in the Details
proud of how the team has outperformed expectations. Today we're announcing GA
support for 32 nodes. That means that Virtual SAN can now scale from a
modest 3 node remote office, to a multi-petabyte, mega-IOPS monster just
by adding more server resources... and ...VSAN isn't bolted on, it's built in."
- says Ben Fathi,
VMware - in his blog -
SAN: Powerfully Simple and Simply Powerful
old software will slow new silicon in memory done by SSDs
February 5, 2014 - In a new blog -
Vistas For Persistent Memory - Tom Coughlin,
Associates reminds us that in exteremely fast SSDs - lowering the
hardware latency is just one part of the design solution.
Tom says -
"An important element in using persistent memory in the PCIe and memory
bus of computers is the creation of software programs that take advantage of the
speed and low latency of nonvolatile memory. With the increase in performance
that new interfaces allow, software built around slower storage technologies
becomes a significant issue preventing getting the full performance from a
persistent memory system."
Tom's article includes a graph which
shows the increasing proportion of the read access time taken up by system
software in successively faster hardware interface generations. ...read
Editor's comments:- living with the old
while planning for a new type of SSD-aware computer architecture is
Just how complicated that picture can be... you may
glimpse in a classic far reaching paper (about abstracting application
transactional semantics in usefully different ways when viewed from their
interactions with the flash translation layer) - called
Operations via the Flash Translation Layer (pdf) by Gary Orenstein,
SNIA proposes new standard for virtualizing SSD implemented
Editor:- January 27, 2014 - It's years since the first
SSD software horses
were seen to be leaving the stables - but last week - a
standards ORG - SNIA
an effort to bolt these doors with the release of version 1 of what it hopes
will be a new standard called the
Programming Model (pdf)
Editor's comments:- Currently if
you use SSDs as memory using
PCIe SSDs from
Virident, or if you
plan to use memory channel SSDs from
SanDisk - then you're
potentially looking at working in 3 different software environments.
viable permutations of hardware and software compatibility levels shrink for
users when they converge at a popular market application level such as
virtual desktops - but explode into crazy unsupportability for 3rd party
software developers as they try to step back from proprietary APIs and hang
onto more general hooks in operating systems which were never designed around
the core class of capabilities offered by low latency SSDs.
the long term solution to the
state of ad hoc SSD software lies in adapting current OS's - or maybe in
bypassing old OS's entirely and starting again with cloud level service-like
abstrations in virtualized servers - is interesting to speculate.
In the meantime software developers have to work with existing de-facto software
environments (to generate revenue) and also keep an eye on future standards in
the hope that standardization will reduce their costs (one day in the remote
The SSD software platform and the optimum level of
engagement for vendors is a lottery which will suck billions more dollars from
VCs before it is resolved. And I think that market dominance will be a bigger
part of the solution than a set of committee based standards.
10,000 sites use DataCore
Editor:- December 16, 2013
that over 10,000 customer sites have used its software.
stance re enterprise
SSD architecture is that most users can (for the time being) resist the
siren calls of SSD makers towards
all flash enterprise
storage - because "only 5% of workloads require top tier performance.
And businesses have turned to
software to make sure applications are sharing flash and spinning disk,
based on the need to optimize performance and investment."
Maxta joins the elite set of enterprise contenders who are
vying to own the next generation SSD-centric platform
November 13, 2013 - This week Maxta completed its
staged emergence from stealth mode and
its first product - the Maxta Storage
Platform - a hypervisor-agnostic software platform for repurposing arrays
of standard servers (populated with cheap standard
SATA SSDs and
hard drives) into
scalable enterprise class apps servers in which the global CPU and storage
assets become available as an easily managed meta resource with optimized
performance, cost and resilience.
Editor's comments:- I spoke
last week to Yoram
Novick about this new product, his company and what customers have been
doing with it.
Before you dip into my bullet points below - here's a
header note of orientation.
We've all seen new companies launching
SSD software and pitching for the enterprise with products which are little
more than spruced up versions of "hello SSD world!"
year later - some essential compatibility features get added, and later still
some degree of better or worse
It didn't used to matter much if everything wasn't in place at the start - or
if these new companies didn't have sustainable business plans - because there
was an appetite for acquiring
From my perspective I'd say that many companies have
regarded the launch of their SSD software is simply an invitation to attract
users who could provide the market knowledge they needed to flesh out the
In these important respects Maxta is different because:-
prior to this week's product launch they've already had a group of 10 or so
advanced customers in different industries who have been using the product and
also the enterprise features - like manage-ability, scalability, resilience and
data integrity are already in the product today.
Maxta's technology and
business architects have done enterprise storage software before - as you can
see from their linkedin
bios. Yoram told me that he and
Amar Rao (Maxta's VP of
Business Development ) used to compete with each other in earlier storage
startups and the companies which had acquired them.
So it soon became
clear to me in the details I saw and asked about (not all of which are listed
here) that a lot of careful planning and up front thinking and problem solving
has already guided the "launch".
Here's some of what I
- market scope
MxSP is the software glue for enabling easily managed
SSD enhanced storage
pools in VM environments which scale from the ROBO upto
base level configuration which provides HA features starts as low as 3 nodes.
This is attractive for enterprises with remote offices because it's a small
footprint. But it's also attractive from a running cost point of view too -
Yoram said because of the special low price point for associated software.
has a customer who started with these 3 node configurations for remote offices
but liked them so much that their bigger arrays are now built mostly from
arrays of 3 too.
- the problem it solves
The evolution of enterprise CPU and storage
resources have followed different tracks in the past decade - leaving users in
the position today where it's easy and economic to deploy more CPUs but
relatively awkward, expensive or error prone to map these CPU resources into
virtual storage which scales with the same ease and which takes advantage of
the low cost and high performance of commodity enterprise SSDs.
- the storage pool
Maxta's architecture aggregates the SSDs and HDDs
in the server pool into a single globally accessible, fault tolerant SSD
accelerated virtual storage pool.
Within Maxta's software - all the
SSDs are collected together as 1 super SSD resource and another big resource
is created from the HDDs.
Internally Maxta's software knows that SATA
SSDs and SATA HDDs have different personalities for example:-
- HDDs have low cost per unit of capacity but slow random read latency
- SSDs have fast random read, and fast sequential write
every node in the array has to have an SSD or HDD inside but it's not sensible
to have a system which doesn't have any SSDs at all.
- fault tolerance, data integrity, VM snapshots, cloning etc
they're all in the product now.
- software? - it's a virtual world view
Everything about MxSP is
virtual. And it doesn't require new management tools. The operational aspects
will clarify in customer case studies and white papers.
- Maxta's business plan
I told Yoram how disillusioned I had become
about the sustainability and viability of new storage software companies -
given my experience of having tracked over 1,000 storage companies and
terminating the list of
gone-away and acquired companies in a single decade at the 500 company
level. (That's before I started the gone-away SSD companies list BTW - which is
well on its way to 100.)
Jaundiced by that experience it seems to me
that over 95% of storage software startups don't have much of a clue about how
to translate their IP assets into any sustainable business value and are mostly
founded at the outset with the fervent desire that before the VC and IPO
money run out - they will get acquired. So I asked him if Maxta would be any
different to that?
Yoram told me some of what Maxta has been doing in
laying the foundations for growing the business to become a significant storage
platform (in his words) a significant software company like Microsoft or
I won't say more here because this is too long already -
despite having not even mentioned most of the notes I made during our
Looking back on this nearly a week later (and having seen
some of their documents before) I'm left with the impression that maybe indeed
Yoram is right and his company could become not only one of the rare storage
software companies which are sustainable as a business. But going further than
that - maybe too it has the makings of a company which could be one of the
five to ten companies which will dominate the SSD software platform market of
Who are the other contenders?
I've given you
lists before - but this list is evolving because 4 of the 10 companies were
still in stealth mode last time I did that.
If you're interested in
the SSD enhanced storage platform idea (and who wouldn't be) then another good
place to look is the list of competitors which I've compiled in
Maxta's profile page.
new blog by PernixData describes the intermediate states of play
for its HA clustered write acceleration SSD cache
November 5, 2013 - In a clustered,
SSD ASAP VM
environment which supports both read and write acceleration it's essential to
know the detailed policies of any products you're considering - to see if the
consequences - on data vulnerability and performance comply with strategies
which are acceptable for your own intended uses.
In a new blog -
Tolerant Write Acceleration by Frank Denneman
Technology Evangelist at PernixData
describes in a rarely seen level of detail the various states which his
company's FVP goes through when it recognizes that a fault has occured in
either server or flash. And the blog describes the temporary consequences - such
as loss of acceleration - which occur until replacement hardware is pulled in
and configured automatically by the system software.
Stating the design
principles of this product - Frank Denneman says - "Data loss needs to be
avoided at all times, therefore the FVP platform is designed from the ground up
to provide data consistency and availability. By replicating write data to
neighboring flash devices data loss caused by host or component failure is
prevented. Due to the clustered nature of the platform FVP is capable to keep
the state between the write data on the source and replica hosts consistent and
reduce the required space to a minimum without taxing the network connection too
ASAPs - auto tiering / caching appliances
McObject shows in-memory database resilience in NVDIMM
October 9, 2013 - what happens if you pull out the power plug during
intensive in-memory database transactions? For those who don't want to rely on
batteries - but who also need ultimate speed - this is more than just an
Recently on these pages I've been talking a lot
about a new type of
SSDs which are hoping to break into the application space owned by
PCIe SSDs. But another
solution in this area has always been DRAM with power fail features which save
data to flash in the event of
loss. (The only disadvantages being that the memory density and cost are
constrained by the nature of DRAM.)
products include in-memory database software) yesterday
published the results of
benchmarks using AGIGA
in which they did some unthinkable things which you would never wish to try out
for yourself - like rebooting the server while it was running... The result?
Everything was OK.
"The idea that there must be a tradeoff
between performance and persistence/durability has become so ingrained in the
database field that it is rarely questioned. This test shows that mission
critical applications needn't accept latency as the price for recoverability.
Developers working in a variety of application categories will view this as a
breakthrough" said Steve Graves,
Here's a quote from the whitepaper -
Persistence, Without The Performance Penalty (pdf) - "In these tests
eXtremeDB's inserts and updates with AGIGA's NVDIMM for main memory storage
were 2x as fast as using the same IMDS with transaction logging, and
approximately 5x faster for database updates (and this with the
transaction log stored on RAM-disk, a solution that is (even) faster than
storing the log on an SSD). The possibility of gaining so much speed while
giving up nothing in terms of data durability or recoverability makes the IMDS
with NVDIMM combination impossible to ignore in many application categories,
including capital markets, telecom/networking, aerospace and industrial
Editor's comments:- last year McObject
published a paper showing the benefits of using PCIe SSDs for the transaction
log too. They seem to have all angles covered for mission critical ultrafast
databases that can be squeezed into memory.
Permabit has shrunk data storage market by $300 million
Editor:- September 30, 2013 - Permabit today
and hard disk customers have shipped more than 1,000 arrays running its
RAID) software in the past 6 months.
"We estimate that our
partners have delivered an astonishing $300 million in data efficiency savings
to their customers" said Tom Cook, CEO of Permabit
who anticipates license shipments to double in the next 6 months.
efficiency, new RAID in
Proximal Data announces AutoCache version 2
August 26, 2013 - Proximal
the release of version 2.0 of
AutoCache (SSD ASAP software ).
Pricing starts at $999 per host for flash caches less than 500GB. The company
has been demonstrating the new version working with
PCIe SSDs from
Micron at VMworld.
Enmotus demos FuzeDrive hybrid array software
August 13, 2013 - Enmotus
announced that it
is demonstrating its FuzeDrive
(hybrid SSD ASAP)
solutions (with Toshiba
SSDs inside) at the Flash
"While helping accelerate early adoption
of SSDs, today's caching solutions don't always provide the results users
expect. FuzeDrive avoids using traditional caching techniques, and instead
borrows its concepts from intelligent real time virtualization, data movement
and storage pooling techniques typically found in larger 'big iron' enterprise
systems," said Andy
Mills, CEO and Co-founder of Enmotus.
how new SSD software gets things done faster
July 29, 2013 - "One of the ironies of legacy systems software running in
flash systems is the way that the data weaves through layers of fossilized
unreality where emulation is stacked on emulation." - from the news page
Atomic Writes, and a faster way
for the Princess to get her shoes
EMC's acquisition of ScaleIO hints at an SSD server
afterlife for legacy SANs
Editor:- July 16, 2013 - EMC recently
it has agreed to acquire another storage software company - called ScaleIO.
EMC indicated that
ScaleIO's software - which emulates the capabilities of virtual SAN style
storage within the physical implementation of pools of server attached DAS
- makes it easier for users to manage expanding data volumes and reduces the
need for performance planning. The new software will be applied to extend the
application functionality of EMC's
PCIe SSD product lines
and XtremIO rack based flash systems.
Editor's comments:- One
way to view this is it will give EMC similar capabilities to
Nutanix. Or another is
that the EMC/ScaleIO solution (if and when it's done) can be seen as a shot
back across the bows aimed at
software. (You came into our market space - so we're coming into yours.)
a step back however, and it doesn't have to be so personal.
systems have shapes and architectures which date back to a command and control
SAN style architecture
dating back to the 1990s.
If you were trying to solve the same data
processing and content management functions from a clean sheet start today -
you'd probably go for a more "democratic" Google style architecture -
in which most racks in the datacenter are similar - and their function is
defined and can be changed by software - rather than being hardwired by the
description of the box at the time it was invoiced.
It's long been
known that SSD acceleration lets you speed up legacy architectures - but SSD
performance also gives you the freedom to emulate entire applications
environments on cheaper, and more
HGST catches VeloBit
Editor:- July 10, 2013 - For the
past 15 years from what I've seen - the ultimate business aim of most storage
software companies has been - to get
been even more true in the SSD
software market - wherein frankly - most companies don't even pretend to
invest in sustainable business models.
In the past 2 years - an SSD
software company has been
acquired every 2
months (on average) and the latest company sustaining that trend is VeloBit which has been
acquired by WD
for deployment by its subsidiary HGST - it was announced
In case you've forgotten why this trend started - software
makes it easier to sell more SSDs and the ROI from a vendor's point of view is
better than doubling the sales force. That's why valuations (not disclosed in
this case yet) have been so disconnected from the financial outlook of the ISV's
themselves. See also:-
Stec's profiler removes guesswork in sizing SSD caches
May 21, 2013 - Stec
that it's offering a free profiling tool -
Profiler - which can enable users to determine how much benefit they would
get from using its
(SSD caching software) - before they even install any SSDs.
company says that the "non-disruptive installation" can save hours of
administrative trial and error by recommending the optimal block size, and the
capacity and type of SSDs to be used for maximum performance gain.
OCZ gets award for Windows compatible SQL flash cache
May 8, 2013 - OCZ
that its ZD-XL SQL Accelerator earned the
Best of Interop
award in the data center and storage category.
at CeBIT last February) is a bundled package for Windows servers which
includes an SQL optimized flash caching software appliance which leverages
the low latency of an associated
OCZ PCIe SSD card.
judging committee, comprised of 16 IT editors and analysts who reviewed
nearly 150 entries. See also:-
Do you have impure thoughts about deduping SSDs?
March 28, 2013 - What comes to your mind when you think about
theoretical ratio? - x2, x5, x10...
Or maybe you groan? - It's too
messy to manage and even if capacity gets better, something else gets worse
- so let's just forget the idea...
A new blog -
the SSD Dedupe Ticker - by Pure Storage
looks at the state of customer reaility in this aspect of SSD array
technology and comments on the variations you can get according to the type of
app and the way of doing the dedupe.
Among other things the article
also looks at the biggie question - of performance impact - answering the
author's rhetorical question - "why hasn't deduplication taken the primary
storage world by storm like it has the
backup world?" ...read
Nimbus brings flash SMART plus stats to SSD rackmounts
March 25, 2013 - Nimbus
Data Systems today
new software APIs which support its proprietary
HALO OS based family
of rackmount SSDs
- and report on hundreds of real-time and historical metrics such as:-
flash endurance, capacity utilization, latency, power consumption, deduplication
rates, and overall system health. Another new feature is that sys admins can
monitor their Nimbus
SSD arrays via new apps on Android / Apple phones and tablets.
CEO and founder of Nimbus Data said the new software framework would enable
cloud architects and enterprise customers to gain greater insight into their
flash storage by viewing internal aspects of their flash storage which
mattered to them - rather than simply relying on benchmark indicators which
have been cherry picked by vendors or reviewers
another $24 million funding for ZFS SSD ASAP ISV Nexenta
February 27, 2013 - Nexenta
it has secured $24 million in Series D financing.
SSD ASAP software -
- currently supports SSDs from the following companies:-
STEC - according to
hardware support list (pdf).
Virident betas remote PCIe SSD sharing
February 21, 2013 - Virident
beta availability of a new software suite - called FlashMAX Connect - which
enables low latency shared server-side storage and
when used with the
company's range of PCIe SSDs.
New functionality includes:-
- fast / low-latency synchronous mirroring that replicates writes from one
server to another, providing storage node or server failover without affecting
application and data availability.
- shared storage management in remote PCIe SSDs. This allows customers to
share the storage residing on remote servers and thereby scale PCIe flash
capacity independent of compute. For example - a single PCIe flash card can
service multiple servers.
Editor's comments:- it's long been known
within the SSD industry that these features have been in the pipeline - because
they're based on support at the PCIe switch chip level.
- Easily managed controllability of cache policies within installed PCIe
SSDs:- write-back, write-through and write-around cache so that users can
choose cache modes which provide better fit to their performance and
overview of this architecture enabling chip level support and how it offers
flexibility in servers and SSDs - take a look at this video -
enterprise SSD designs by
Software - a new reason to reconsider Intel's server SSDs
February 13, 2013 - Intel
that in the next 30 days it will ship a Linux version of the SSD caching
software - based on IP from its acquisition of
NEVEX last August. The
products have been rebranded as
CAS (Cache Acceleration Software).
Editor's comments:- I
would categorize Intel's current generation of enterprise SSD solutions
(which includes the same old indifferent SSDs working with the new CAS software)
as being in the medium to fast-enough performance range.
customers might be end users who have never used SSD acceleration before - or
users with apps which don't need the higher speeds offered by competing SSD
bundled drive / module packages from
OCZ - and customers who
don't want to do their caching via dedicated rackmount based products from
the dozens of other vendors listed in the
SSD ASAPs directory.
market segment addressed by these new Intel products is the early
majority of enterprise SSD adopters - who will be reassured by the
perceived safety of buying into the dangerous world of solid state storage
acceleration from a value based brand.
I spoke about the new CAS
software to Intel product manager Andrew Flint
who cofounded NEVEX and I
learned some useful things about the product.
The first question I
asked was - how many PCIe SSDs can the CAS product support in a single server?
And were there any graphs showing how performance drops off or is maintained
when you do that.
The answer was - this info isn't publicly available
right now. Although it may be in the future.
That's when I concluded
that Intel CAS (married to current generation Intel SSDs) isn't a fast
product - and is not in the kind of performance league where a user would
seriously worry about this type of
Intel's ideal end-user customers right now for CAS are
people who have been using no SSD acceleration at all coupled with hard drive
arrays. That performance
silo could change - with faster Intel SSDs in the future - and isn't due
to limiting characteristics in the software.
I asked - Does it support
3rd party SSDs?
I was told - the standard release only supports Intel
SSDs. But there's nothing in principle to prevent it being used with other SSDs
using the open source release of the software.
The product is a read
cache. I was told that it makes very good use of whatever RAM is in the server
to optimize both read and write performance. However, my view is that as Intel
SSDs aren't fast - this is somewhat academic.
I asked about the time
constants which are analyzed by the caching software - and learned that -
depending on the app - the data usage period which is analyzed goes up to days.
(Generally in this type of product longer is better - and when you go up from
milli-seconds and seconds to minutes, hours and days - you have the potential to
get better caching results.)
I learned that Intel CAS isn't written
around the data structure or interface - and is hardware agnostic. Users can
tell the software which apps they want to cache - via a control panel. This is
very useful in environments where a single server is running a mix of apps -
some of which are critical (in performance needs) while others are not.
asked - does the CAS have to have advance knowledge of the app? - Is it
optimized for a preset list of apps?
I was told - No. It will work
just as well for - what I called - dark matter software- which might be a
proprietary app which no one else knew about.
I asked if Intel collects
stats from the general population of installed servers which use the software? -
in order to improve tuning algorithms...
I was told - No. The
optimizations (data eviction probability rates) are done based on what is
learned on the customer's own server and private data - and the factory shipped
software. There isn't a wider intelligence learning or gathering or snooping
I learned that a special feature of this Intel CAS release
is the ability to share cache resources with a remote SSD. The data stays hot
and doesn't have to be recreated when different virtual machines are accessing
this type of resource.
Overall I came away with a good impression of
the CAS software and how well the NEVEX technology idea has been assimilated
into Intel's SSD business.
It will undoubtedly help Intel sell more
SSDs to people who have never used enterprise SSDs before - and maybe also to
people with low end apps who have used SSD acceleration before but whose
first choice of SSDs wouldn't otherwise have been Intel.
aligning database block sizes with SSDs
February 5, 2013 - I was only saying to someone yesterday that I've had
emails from readers who are designing
software for SSDs who
- having researched the subject of
flash etc - then spent
too much time over-worrying about internal SSD hardware details that they
really shouldn't be worrying about - because by the time they learn about it -
that type of hardware issue is ancient history.
By a curious
coincidence today I came across a recent blog by Chas. Dye at Pure Storage
DON'T Fiddle with Your Database Block Size! - which also warns about this
Chas says - "At Pure Storage, we believe that a factor
that should never influence the block size decision is your storage subsystem."
comments:- I'd certainly agree that trying to slavishly make your data
structures look like something you've read about which might be inside an
SSD controller is
probably a waste of time - because unless you know the SSD designer you don't
really know what's going on - and the abstraction you read about in some web
site is only a small part of the picture. If an
SSD is so sensitive to
the data you hit it with - it's not the SSD you should have bought in the
Violin acquires GridIron
Editor:- January 21, 2013 - Violin today
it has acquired GridIron
Editor's comments:- in
October 2012 I
listed GridIron as 1 of the 3 main contenders to
Fusion-io in the
enterprise SSD software
stakes -with the qualifying comment...
"GridIron - probably has
the most sophisticated SSD
ASAP software in the industry. But it's a shame it has been tied (until
recently) to their hardware - an SSD HDD hybrid box."
announcement - which adds to the growing list of
acquisitions in the modern era of the SSD market - will enable Violin to
strengthen its already established authority in the enterprise SSD rack market.
Samsung acquires an SSD software company
December 15, 2012 - Samsung
acquired an SSD
software company - NVELO
which operates in the SSD
ASAPs (caching) market.
Enmotus demos its SSD ASAP technology
November 27, 2012 - Enmotus
is demonstrating its auto-tiering software - which it calls
MicroTiering technology (pdf) - for the first time in public this week at
the Server Design Summit.
OCZ's new VXL software release includes fault tolerant support
for arrays of PCIe SSDs
Editor:- October 23, 2012 - OCZ today
a new version (1.2 ) of its
cache and virtualization software - which provides high availability,
synchonous replication and enhanced VM performance across arrays of the
company's Z-Drive R4 PCIe
The company says this assures that host-based flash is
treated as a continuously available storage resource across virtualized clusters
and yields no data loss and no VM downtime even during complete server
"By combining the power of storage virtualization and
PCIe flash caching, and by working centrally with the hypervisor rather than
with each local VM, we have developed a solution that takes full advantage of
flash without losing any of the benefits associated with virtualization,"
said Dr. Allon Cohen,
VP of Software and Solutions, OCZ. "VXL's ability to transparently
distribute flash resources across virtualized environments provides IT
professionals with a simple to implement solution..."
AMD will rebrand Dataram's RAMDisk software
September 6, 2012 - Dataram
it will develop a version of its RAMDisk software which will be rebranded
by AMD in Q4 under the name of Radeon
RAMDisk and will target Windows market gaming enthusiasts seeking (upto 5x)
faster performance when used with enough memory.
STEC mini-survey suggests that 60% of serious VM users already
Editor:- August 28, 2012 - A
of visitors attending the first day of VMworld - and conducted on behalf of
suggested that over 60% of attendees already had SSDs in their
datacenters but also that less than 50% of their business-critical applications
are currently supported by SSDs.
Violin plugs some software gaps with Symantec
August 13, 2012 - Violin
rackmount SSDs can now support snapshots, cloning, dedupe, replication and
thin provisioning - based on software IP from Symantec.
AutoCache for PCIe SSDs
Editor:- July 23, 2012 -
immediate availability of its first product - a
SSD ASAP - designed
to work with PCIe SSDs - in particular - products from
for cache sizes less than 500GB) reduces bottlenecks in virtualized servers to
increase VM density, efficiency and performance. The company says it can
increase VM density upto 3x with absolutely no impact on IT operations.
Editor's comments:- here are some questions I asked about the
new product - and the answers I got from Rich Pappas,
Proximal's VP of sales and business development.
Editor:- How long
does it take for the algorithms to reach peak efficiency?
Pappas:- It varies by workload, but typically it takes about 15
minutes for the cache to warm to reach peak efficiency.
the caching only on reads, or is it effective on writes too?
AutoCache will only cache reads, but by virtue of relieving the backend
datastore from read traffic, we have actually seen overall write performance
improvements as well. This effect is also dependent on the workload.
Amazon offers explicit SSD performance in the cloud
July 19, 2012 - There are many ways SSDs can be used inside
classic cloud storage
services infrastructure:- to keep things running smoothly (even out
IOPS), reduce running
Web Services recently launched a new high(er) IOPS instance type for
developers who explicitly want to access SSD like performance.
3 to 5 years time all enterprise storage infastucture will be solid state -
but due to economic necessities it will still be segmented into different types
by speed and function - as I described in my
SSD silos article -
even when it's all solid state.
I predict that when that happens -
AWS's marketers may choose to describe its lowest speed storage as "HDD
like" - even when it's SSD - in order to convey to customers what it's
about. It takes a long time for people to let go of old ideas. Remember
Virtual Tape Libraries?
Software is key to SSD innovation - says blog from Virident
June 29, 2012 - Dedupe and fibre-channel are some of the innovations discussed
blog by Jeff Sosa,
Director of Product Management,
who poses the question - is flash storage an incremental or a radical
Sosa's article goes on to say - "The 'radical'
innovation in the host-attached flash storage marketplace today comes from
products that not only access flash through a PCIe connection, but also bypass
storage protocols to drive new levels of performance and enable new
functionality not previously imagined." ...read
Nutanix announces a new NFS for PCIe SSD accelerated CPUs
June 12, 2012 - Nutanix
announced the general availability of NDFS (Nutanix Distributed File
System), a bold new distributed filesystem that has been optimized to leverage
localized low latency PCIe
SSDs such as those from Fusion-io.
shifting the NFS datapath away from the network directly onto the VMware vSphere
host, NDFS bypasses network communications that have historically been fraught
with multiple high-latency hops between top-of-rack and end-of-row switches.
Nutanix accelerates both read and writes for any workload.
availability are achieved by data mirroring across high-speed 10GbE
Editor's comments:- Nutanix is in the
SSD ASAP market -
equivalency architecture integrated in the OS. The company says their
architecture "collapses compute and storage into a single tier." You
can get the general idea from their
STEC releases SSD cache software for any make of SSD
June 6, 2012 - STEC
the general availability of the company's
EnhanceIO SSD Cache
Software for Linux and Windows environments with pricing starting from $295
and $495 (per server) for a 1 year subscription.
STEC says its SSD
cache software can used with any vendor's
In addition, a Linux version of EnhanceIO SSD Cache Software, based on
caching module, will be made available under a general public license
"As one of the original architects of Flashcache, I'm extremely
pleased to see this technology being enhanced and supported by STEC in their
EnhanceIO software," said Mohan Srinivasan, software engineer at
Facebook. "Flashcache has proven to be an invaluable tool for accelerating
application performance at Facebook."
Users can choose from a selection of caching schemes and block sizes
to suit their preference and SSD's capabilities. STEC stores the metadata for
the cache in system DRAM rather than in the SSD. The DRAM required for the
cache is 0.1% of the cache size so a terabyte of SSD cache requires about
1GB of DRAM support. Product support tools include a profiler which can collect
user data and suggest the best policy option parameters for the cache setup.
comments:- irrespective of the technical strengths and weaknesses (and
pricing model) of the this new product compared to other competing
SSD ASAP / caching
offerings - one question which immediately springs to mind is this.
serious is STEC about making this software work as a standalone product? And if
it becomes successful will the company be tempted to bundle it free with its
|STORAGEsearch is published by
| Spellerbyte's software factory |
trust SSD market data?
where are we now
with SSD software?
how fast can your SSD
hidden segments in the enterprise for SSD boxes
evidence to support the idea that both applications performance and data storage
efficiency can be greatly improved if the flash management and apps management
processor are either the same CPU - or if they can talk to each other in a more
effective way. |
|12 key SSD
ideas which made impacts in 2014|
|It sounds simple enough...
New Dynasty is a software environment and architecture which is planned at the
outset to operate with SSDs. But adding SSD software into the mix brings its
own multiplication factors.
What does a server node look like? How is it clustered or scaled? Is
the server node part of the storage? Is the server node a building block for
all the storage? Where should the storage live? How should it be tiered?
hidden segments in the enterprise for rackmount SSDs|
|"why are so many
companies piling into the SSD market - when even the leading enterprise
companies haven't demonstrated sustainable business models yet?"|
|hostage to the
fortunes of SSD|
| what shoes does the
Princess need now?|
|Editor:- July 29, 2013 - One of the
latency reducing tricks in a world where every SSD vendor has access to the same
flash memory and
interface chips and choice
is the applications magnifying power of
SSD software. |
the way that new SSD software gets things done faster is to avoid doing
some things at all - by carefully discriminating between - what needs to be
done - compared to what would normally get done in blind obedience to
One of the ironies of legacy systems software running in
flash systems is the way that the data weaves through layers of fossilized
unreality where emulation is stacked on emulation - and hardwired into
the software and data flow logic are the remembered
once-deemed-to-be-efficient solutions to data flow control problems whose
origins are now almost forgotten.
So the SSD emulates a hard drive.
And the hard drive emulates memory.
And it gets worse.
The fetching and prefetching and polite but useless flurries of activity which
happen behind the scenes makes it appear more like a bunch of courtiers in a
fairy tale palace reacting to this simple request.
The Princess needs
What shoes? What color? What style? What for?
hasn't said yet - just get as many shoes as you can carry and be quick about it!
Yet despite all this background mayhem the application - somehow -
still runs faster on SSDs than on the old hardware. (And the Princess has never
been seen in public without wearing appropriate footwear.)
way to save time (improve latency) is to say - what if instead of just
speeding up all the tangled processes of emulating a hard drive emulating
memory and worrying about all the old fossilized limits of packet sizes and
flow control in drives and interface cards which no longer exist except in
museums but which have been preserved in legacy software - we instead
make an effort to write some new software which knows it's operating in a flash
world and doesn't have to recite old HDD spells to charm the data?
what-if the Princess knows where the shoe room is - and rather than wait -
she's going to get the shoes for herself?
The implications of these
what-if? results (for SSD software) are easy to anticipate and we've seen what
happens when these ideas have
found their way
into SSD benchmarks but
it still takes time for these new ideas to work their way into standard software
And if the Princess changes her mind between the time she
sets off to the shoe room and when she gets there - she's still going to get the
shoes she wants quicker than
if she asked her maid.
All of which is a preamble to say that Fusion-io last week
that its Atomic Writes API contributed for standardization to the T10 SCSI
Storage Interfaces Technical Committee is now in use in mainstream MySQL
databases MariaDB 5.5.31 and Percona Server 5.5.31.
Princesses prefer not to be kept waiting.
|"SSD is going down! -
We're going down!"|
If you've ever watched the movie - Black Hawk
Down - there's a memorable scene in which...
sudden power loss|
|If you've seen or read -
The Hobbit - then you'll be familiar with the concept of the riddle game.
Something similar is playing out now in the enterprise flash array
The setting? I forgot to mention this.
The hero - a mythical hobbit-like creature called "User" is
trapped in a high gravity well / force-field - just outside the entrance to a
cave in which are stored great treasures.
| playing the SSD box
inside the box|
|Editor:- May 29, 2013 - If you're an enterprise
user who is already sold on the idea of using more SSDs - what could be
better than a great new SSD drive?|
If you're an SSD
vendor looking for the magic formula to open up vast new untapped markets
for SSDs - what kind of solution do you need to offer to attract enterprises
who aren't at the sharp end of the performance pain curve, are content with the
speed they get from HDDs and who aren't even looking at SSDs for their network
These problems have been preoccupying the SSD industry's
smartest thinkers for years.
And their answer to both questions is
the same. (Although details vary).
It's a new type of SSD box.
A new generation of enterprise SSD rackmounts is breaking all the
rules which previously constrained price, performance and reliability. The
sum impact of cleverly designed SSD arrays is systems which are many times
more competitive than you would imagine from any tear-down analysis of the
g about rackmount SSDs is explored in the new home page
blog on StorageSearch.com
thinking inside the box.
|EMC's flash educational
|Editor:- April 15, 2013 - I've been saying for
years that any simple analysis - like my
enterprise silos model
- makes it clear why no single flash product (or supplier) can economically
satisfy all requirements.|
first idea is graphically encapsulated in a video
by EMC which they call "FLASH in a flash" which - because I'm
not a fan of SSD videos
- I only saw for the first time today.
This video also introduces a
smart and almost apologetic way of positioning
hard drive based
storage - as being for applications which can "tolerate multi
That's clever - because they know most
of you already have these HDD systems, and EMC is best known for these slower
rotating storage systems. That's how they get you to lower your guard by
introducing the familiar.
The 2nd half of the video - which is not so
good as a general flash video - suggests that EMC is the best supplier to look
at because it's got 25 years experience in storage.
In my view that
argument doesn't logically follow.
Experience in something that's
different is irrelevant. It's like suggesting that breeding horses would
have made Ford
better at designing engines.
Nice try by EMC marketing at subtle SSD
sales sophistry by linking irrelevant concepts though.
impact from RAID rebuilds becomes compounded with long rebuild times incurred by
mutli-terabyte drives. Since traditional RAID rebuilds entirely into a new spare
drive, there is a massive bottleneck of the write speed of that single drive
combined with the read bottleneck of the few other drives in the RAID set."|
CEO - SolidFire
- in his recent
blog - Say
farewell to RAID storage (March 14, 2013).|
RAID & SSD
|the Modern Era of SSDs |
|Editor:- January 2, 2013 - My recent home page
Transitions in SSD - mentions some of the key changes in the SSD market
which took hold in recent quarters - but as we're starting another new
calendar year in SSD - I want to say more about the context here.|
in a market which appears to be so fast moving as the SSD market - where hot new
SSD companies can enter the
top SSD companies list
(ranked by search) within weeks of exiting stealth mode, and some new
SSD companies are
acquired within a few quarters of launching their first product - it can
still take years before new technologies which excite technologists,
investors are adopted by more than 10% of SSD users.
strategic multi-year big changes and transitions which are sometimes hard to
pin down to a single year. For example the transition in the enterprise SSD
market from RAM
to 98% flash - which took 8 years.
Although it's easy to
recognize the start of new technology changes - it's harder to be so precise
about big market shifts - because those - by their very nature - occur only
when enough people get hold of a new way of doing things and change their buying
at the SSD market - 2013 now clearly marks the 10th anniversary of a
distinct market period which I now think of as - the Modern Era of SSDs.
What do I mean by the Modern Era of SSDs?
It's when SSDs
changed from being a niche tactical technology which satisfied the needs of
some markets (ruggedized military / industrial storage and next generation
server acceleration at any cost) to a time when the market advance of SSDs as a
significant well known core market within the computer industry became a
historical inevitability - and when the only serious technology which could
displace an SSD from its market role was another SSD.
products which we would recognize as enterprise SSDs were shipping for several
years before 2003 - it was in that year, 2003 - when there was enough confidence
in the minds of enough people in the SSD market that the future of SSDs could be
much bigger (100x bigger) and different to what had happened before.
wasn't simply my publication of
an article at the time
which explained why this could happen - nor simply the immediately post
publication discussions I had with SSD industry leaders at the time - nor indeed
in later years when founders and managers of new SSD companies kindly
told me that some of their thinking about the possibilities for the SSD
market had been influenced by those earlier articles on StorageSearch.com
It's just as much the case that the alternative futures which could have knocked
the SSD market off-course (such as faster CPU clock rates,
hard drives or faster
optical storage) didn't
The year after year "no-shows" by SSD's past
phantom demons were just as important as the new SSD technologies which did put
in an appearance.
Today it's clear to anyone looking seriously at
the data economy - the SSD market is here to stay and has its sights set on
being at the center of your future hardware and infrastructure decision making.
to big upcoming changes in SSD market thinking?
Can I say anything
at all useful at this stage about what the 2nd decade of the modern era of SSDs
will be like?
I think it will be the time when a critical mass of SSD
users become more sophisticated in their understanding and use of different
types of SSDs - and when each part of the SSD market becomes less generalized
and more focused.
It's not just about the
SSD software, and
iit's not just about the
SSD chip technologies.
These simply outline possibilities. What's important - and what will become even
clearer - is the dividing lines and colors of application specific SSDs.
specific enterprise SSDs - is a technology trend which started
shipping more than 3 years ago. But - as I said above - markets happen when
enough people have decided to make them happen - and not simply because
pioneering products are available.
|"In some ways, blocks
lost due to media corruption present a problem similar to recovering deleted
files. If it is detected quickly enough, user analysis can be done on the
cyclical journal file, and this might help determine the previous state of the
file system metadata. Information about the previous state can then be used to
create a replacement for that block, effectively restoring a file."|
CRCs are important - blog by Thom Denholm Datalight (January
|In October 2002 - StorageSearch.com's
editor talked about the role of software versus human-ware in enterprise hot
"Until the storage management software
you run in your orgazination is intelligent enough to learn by itself what kinds
of applications you're running, and optimize the characteristics of your
different types of storage devices, your ability to make the best use out of new
storage technologies such as SSDs will be limited by your own technical skills
and the amount of work and effort you are prepared to put into solving your own
performance and resource utilization problems."
|Ancient storage software
management inhibits roadmap to $5 billion enterprise SSD market -
StorageSearch.com's news page blog (October 2002)|
|In November 2002
- Bill Gates, talking about Tablet PC's said:- "There are also a
lot of peripherals that need to improve here. ...Eventually even the so-called
disks will come along and not only will we have the mechanical disks going
down to 1.8 inch but some
kind of SSD... will be part of different Tablet PCs."|
|"In May 2003 -Imperial
Technology launched the world's first SSD tuning software tool called -
WhatsHot SSD - which analyzed real-time file usage on the SAN to identify
hot-files to place in SSD."|
|"In May 2004 - the
SPARC Product Directory published an article -
Why Sun Should
Acquire an SSD Company - which argued that integrating SSDs into Sun's
Solaris OS and servers would result in the fastest database servers and more
than make up for speed deficiencies in its SPARC processors."|
|In November 2006
- Microsoft announced business availability of its new Vista operating
system - loudly heralded as being the first PC market OS to include SSD-aware
support and native SSD cache management.
Vista (whether for SSDs or HDDs) proved to be so good that for
years after its launch millions of professional pc users upgraded back to XP.
|"In August 2007 -
EasyCo launched its "Managed Flash Technology" software to
enable enterprise grade RAID-5 arrays built from consumer grade flash
SSDs. MFT boosted SSD writes while also improving endurance..."|
SSD history - 2007
|"In September 2009
- Dataram launched the XcelaSAN - a fast 2U rackmount
SSD ASAP (auto
accelerating appliance) which automatically identified hotspots to relocate
critical data. The company said the XcelaSAN would automatically learn and self
optimize during the 1st few hours of operation..."|
SSD history - 2009
|In November 2009 -
Google opened its doors to developers who wanted to work with
Chrome OS - a new operating
system for tablets.|
In the opening video of the
OS blog we learned that the architects of the new OS were "obsessed
with speed". And the new netbook OS was designed from the ground up to
support only flash
SSDs as the default mass storage.
Google said - there is no room
in this OS for outmoded 50 year old
hard disk technology.
|how fast can your
SSD run backwards?|
|SSDs are complex devices and there's a
lot of mysterious behavior which isn't fully revealed by benchmarks, datasheets
and whitepapers. |
Underlying all the important aspects of SSD behavior
which arise from the intrinsic technologies and architecture inside the SSD.
Software - by Zsolt Kerekes,
|The most common type of "storage
software" is that which does
backup or replication.
But there are a lot more different types of storage software than that.|
for making the hardware work with the OS are a good example. But since they
nearly always come from the same
IHV - there's no point
in listing such products here.
analyzing storage can
range from simple storage bus analyzers which help developers debug driver code,
and freeware which looks at bottlenecks in your database upto SAN wide
heavyweight packages which help you understand and manage an enterprise storage
network. And while on the subject of SANS - a few brave companies like
Wasabi have developed
what are in effect NAS
As WAN storage networks have become more common the
concept of accelerating or deduping the communications payload has also received
a lot of developer attention. A leading pioneer in the IP acceleration software
market is NetEx, whereas
the list of storage
ISVs mentioned on these pages already runs into double digits.
Security is a big subject
- which has had its own pages for many years. And the
market which started out as a software solutions market has expanded into
hardware - because it takes too long to erase hundreds or thousands of
discarded hard drives (or tapes) using software on a single PC.
companies offer software downloads to help you with simper recovery tasks. But
when your hard drives have been charred to smoky plastic or immersed in the
sludge waters of a flood - a UPS or Fedex upload is a more realistic solution.
all of that sounds too complicated then there are plenty of independent
companies to help you do it yourself or (if you've got enough money)
companies who will take the problem of managing it all off your hands.
like to talk about "lifecycles" - because it makes it sound like
they've actually thought about what will happen to their teenage hacker
developed code, or your data, for more than 5 minutes.
is another word which has been fashionable in recent years. Although every piece
of software that's not part of a hardware driver or OS kernel already includes
many levels of assumed virtualization.
One part of the lifecycle
which ISVs don't talk about so much - is that part when they are no longer in
business having gone bust
or been acquired. But it doesn't seem to stop new startup ISVs going to
the local storage VC in
the wall machines to request funding.
There are thousands of
storage software related stories in our