That's a great deck, Chris. -marc
Sent from my iPhone On 2010-11-27, at 10:34 AM, Christopher George <cgeo...@ddrdrive.com> wrote: >> I haven't had a chance to test a Vertex 2 PRO against my 2 EX, and I'd >> be interested if anyone else has. > > I recently presented at the OpenStorage Summit 2010 and compared > exactly the three devices you mention in your post (Vertex 2 EX, > Vertex 2 Pro, and the DDRdrive X1) as ZIL Accelerators. > > Jump to slide 37 for the write IOPS benchmarks: > > http://www.ddrdrive.com/zil_accelerator.pdf > >> and you *really* want to make sure you get the 4k alignment right > > Excellent point, starting on slide 66 the performance impact of partition > misalignment is illustrated. Considering the results, longevity might be > an even greater concern than decreased IOPS performance as ZIL > acceleration is a worst case scenario for a Flash based SSD. > >> The DDRdrive is still the way to go for the ultimate ZIL accelleration, >> but it's pricey as hell. > > In addition to product cost, I believe IOPS/$ is a relevant point of > comparison. > > Google products gives the price range for the OCZ 50GB SSDs: > Vertex 2 EX (OCZSSD2-2VTXEX50G: $870 - $1,011 USD) > Vertex 2 Pro (OCZSSD2-2VTXP50G: $399 - $525 USD) > > 4KB Sustained and Aligned Mixed Write IOPS results (See pdf above): > Vertex 2 EX (6325 IOPS) > Vertex 2 Pro (3252 IOPS) > DDRdrive X1 (38701 IOPS) > > Using the lowest online price for both the Vertex 2 EX and Vertex 2 Pro, > and the full list price (SRP) of the DDRdrive X1. > > IOPS/Dollar($): > Vertex 2 EX (6325 IOPS / $870) = 7.27 > Vertex 2 Pro (3252 IOPS / $399) = 8.15 > DDRdrive X1 (38701 IOPS / $1,995) = 19.40 > > Best regards, > > Christopher George > Founder/CTO > www.ddrdrive.com > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
