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
