This is correct, and you can read about it here: http://blogs.sun.com/ahl/entry/fishworks_launch
Adam On Fri, Jan 23, 2009 at 05:03:57PM +0000, Ross Smith wrote: > That's my understanding too. One (STEC?) drive as a write cache, > basically a write optimised SSD. And cheaper, larger, read optimised > SSD's for the read cache. > > I thought it was an odd strategy until I read into SSD's a little more > and realised you really do have to think about your usage cases with > these. SSD's are very definitely not all alike. > > > On Fri, Jan 23, 2009 at 4:33 PM, Greg Mason <gma...@msu.edu> wrote: > > If i'm not mistaken (and somebody please correct me if i'm wrong), the Sun > > 7000 series storage appliances (the Fishworks boxes) use enterprise SSDs, > > with dram caching. One such product is made by STEC. > > > > My understanding is that the Sun appliances use one SSD for the ZIL, and one > > as a read cache. For the 7210 (which is basically a Sun Fire X4540), that > > gives you 46 disks and 2 SSDs. > > > > -Greg > > > > > > Bob Friesenhahn wrote: > >> > >> On Thu, 22 Jan 2009, Ross wrote: > >> > >>> However, now I've written that, Sun use SATA (SAS?) SSD's in their high > >>> end fishworks storage, so I guess it definately works for some use cases. > >> > >> But the "fishworks" (Fishworks is a development team, not a product) write > >> cache device is not based on FLASH. It is based on DRAM. The difference > >> is > >> like night and day. Apparently there can also be a read cache which is > >> based > >> on FLASH. > >> > >> Bob > >> ====================================== > >> Bob Friesenhahn > >> bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ > >> GraphicsMagick Maintainer, http://www.GraphicsMagick.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 -- Adam Leventhal, Fishworks http://blogs.sun.com/ahl _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
