What kind of testing did you do on the Samsung SSD?
I've used FusionIO cards to get upwards of 500MB/s writes and OCZ Deneva
SSD (SATA) drives to get 200-250MB/s writes. In many cases the trick is to
make sure you have a sufficient amount of threads doing writes in order to
get optimal performance.
Or it could just be that the Samsung drive you tested has something
seriously wrong with it.
-Moazam
On Nov 26, 2010 8:40pm, Edward Ned Harvey <sh...@nedharvey.com> wrote:
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Karel Gardas
>
> Thank you Christopher and Edward for all the detailed information
provided.
> Indeed DDRDrive looks like a right tool for fast ZIL, but for my
development
> workstation I'm rather searching for l2arc cache where as you note
ReviDrive
> might do the nice job.
Be sure to test the performance of the device when/if you get it. A lot of
SSD's out there don't perform any better than spindle drives.
In fact, I recently got one of these Samsung drives...
http://tinyurl.com/38s3ac3
The spec sheet says sequential read 220MB/s, sequential write 120MB/s...
Which is 2-4 times faster than the best SATA disk out there... And of
course, negligible seek time and latency ...
But in practice, I find that drive is no faster than my cheap 500G sata
disk. Or maybe just barely faster. Not much.
You can't go wrong by adding more RAM. Until you hit the price barrier.
Before you start building l2arc.
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