Nicholas Lee wrote:
On Tue, Apr 14, 2009 at 5:57 AM, Will Murnane <will.murn...@gmail.com
<mailto:will.murn...@gmail.com>> wrote:
> Has anyone done any specific testing with SSD devices and
solaris other than
> the FISHWORKS stuff? Which is better for what - SLC and MLC?
My impression is that the flash controllers make a much bigger
difference than the type of flash inside. You should take a look at
AnandTech's review of the new OCZ Vertex drives [1], which has a
fairly comprehensive set of benchmarks. I don't think any of the
products they review are really optimal choices, though; the Intel
X25-E drives look good until you see the price tag, and even they only
do 30-odd MB/s random writes.
Couple excellent articles about SSD from adandtech last month:
http://www.anandtech.com/showdoc.aspx?i=3532 - SSD versus Enterprise
SAS and SATA disks (20/3/09)
http://www.anandtech.com/storage/showdoc.aspx?i=3531 - The SSD
Anthology: Understanding SSDs and New Drives from OCZ (18/3/09)
And it looks like the Intel fragmentation issue is fixed as
well: http://techreport.com/discussions.x/16739
FYI, Intel recently had a new firmware release. IMHO, odds are that
this will be as common as HDD firmware releases, at least for the
next few years.
http://news.cnet.com/8301-13924_3-10218245-64.html?tag=mncol
It's a shame the Sun Writezilla devices are almost 10k USD - seems
there are the only units "on the market" that (apart from cost) work
"well all around" as slog devices - form factor, interface/drivers and
performance.
Sun OEMs all disks, including SSDs.
How much of an issue does the random write bandwidth limit have on a
slog device? What about latency? I would have thought the write
traffic pattern for slog io was more sequential and bursty.
Bandwidth? Almost none. It is a latency play and pretty much any modern
system has enough bandwidth. As the old saying goes, money can buy
bandwidth, latency requires bribing god.
-- richard
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