[storage-discuss] [zfs-discuss] surprisingly poor performance

[Bob Friesenhahn]

On Fri, 3 Jul 2009, James Lever wrote:
>
> I did some tests with a ramdisk slog and the the write IOPS seemed to run 
> about the 4k/s mark vs about 800/s when using the SSD as slog and 200/s 
> without a slog.

It seems like you may have selected the wrong SSD product to use. 
There seems to be a huge variation in performance (and cost) with 
so-called "enterprise" SSDs.  SSDs with capacitor-backed write caches 
seem to be fastest.

Bob
--
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/