ACARD 9010 is good enough in this aspect, if you DON'T need extremely high IOPS...
Sorry for the typo. Fred > -----Original Message----- > From: Fred Liu > Sent: 星期四, 十二月 23, 2010 15:30 > To: 'Erik Trimble'; Christopher George > Cc: zfs-discuss@opensolaris.org > Subject: RE: [zfs-discuss] Looking for 3.5" SSD for ZIL > > ACARD 9010 is good enough in this aspect, if you need extremely high > iops... > > Fred > > > -----Original Message----- > > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > > boun...@opensolaris.org] On Behalf Of Erik Trimble > > Sent: 星期四, 十二月 23, 2010 14:36 > > To: Christopher George > > Cc: zfs-discuss@opensolaris.org > > Subject: Re: [zfs-discuss] Looking for 3.5" SSD for ZIL > > > > On 12/22/2010 7:05 AM, Christopher George wrote: > > >> I'm not sure if TRIM will work with ZFS. > > > Neither ZFS nor the ZIL code in particular support TRIM. > > > > > >> I was concerned that with trim support the SSD life and > > >> write throughput will get affected. > > > Your concerns about sustainable write performance (IOPS) > > > for a Flash based SSD are valid, the resulting degradation > > > will vary depending on the controller used. > > > > > > Best regards, > > > > > > Christopher George > > > Founder/CTO > > > www.ddrdrive.com > > > > Christopher is correct, in that SSDs will suffer from (non-trivial) > > performance degredation after they've exhausted their free list, and > > haven't been told to reclaim emptied space. True battery-backed DRAM > > is > > the only permanent solution currently available which never runs into > > this problem. Even TRIM-supported SSDs eventually need > reconditioning. > > > > However, this *can* be overcome by frequently re-formatting the SSD > > (not > > the Solaris format, a low-level format using a vendor-supplied > > utility). It's generally a simple thing, but requires pulling the > SSD > > from the server, connecting it to either a Linux or Windows box, > > running > > the reformatter, then replacing the SSD. Which, is a PITA. > > > > But, still a bit cheaper than buying a DDRdrive. <wink> > > > > > > -- > > Erik Trimble > > Java System Support > > Mailstop: usca22-123 > > Phone: x17195 > > Santa Clara, CA > > Timezone: US/Pacific (GMT-0800) > > > > _______________________________________________ > > 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
