|the Problem with
Write IOPS in flash SSDs |
|the "play it again Sam"
Flash SSD "random write IOPS" are now similar
to "read IOPS" in many of the
why are they such a poor predictor of application performance?
why are users still buying
RAM SSDs which cost an
order of magnitude more than SLC? (let alone
MLC) - even
when the IOPS specs look similar.
||This article tells you
why the specs got faster - but the applications didn't. And why competing SSDs
with apparently identical benchmark results can perform completely
talks to SSD leaders... |
CEO - re MLC in banks.
Over 80% of the SSDs that
Fusion-io has sold in the last couple of years have been MLC rather than SLC -
and David Flynn
thinks that they probably have a bigger base of enterprise MLC SSDs which has
been operating longer in customer sites (upto 3 years) than any other company.
- re Oracle acceleration market. |
I asked about how Violin's
business was doing - and in particular were they seeing any drop-off in RAM
Basile said - on the contrary that their RAM based appliance business
was growing - and overall their SSD business was growing faster than anything he
had seen in previous companies. In the enterprise SSD acceleration market they
said they thought the next few years would see a lot of winners. ...read the article
Nimbus's CEO -
re the design of its NAS SSDs.
The 1st question I asked was about the
storage blades. I had already guessed (and he confirmed) the interface was SAS.
But the surprise came when I asked whose SSDs was he using? Thomas Isakovich
said Nimbus makes its own SSDs ... ...read the article
Texas Memory Systems
- re MLC and RAM SSDs.
said current consumer grade MLC nand flash has endurance on the order of 3,000
write cycles. ... And the company's burn-in process (done for QA as part of
manufacturing) would use up 10% of the endurance life before the SSD even
reached the customer!
In many bank applications RAM SSDs are actually
cheaper than flash - because of the small size of the data. ...read the article