In an ideal world, if we could obtain details on how to reset/format blocks of a SSD, we could do it automatically running behind the ZIL. As a log its going in one direction, a background task could clean up behind it, making the performance lowing over time a non-issue for the ZIL. A first start may be calling unmap/trim on those blocks (which I was surprised to find in the source is already coded up in the SATA driver, just not used yet) but really a reset would be better.
But as you say a tool to say if its need doing would be a good start. They certainly exist in closed source form... Deano -----Original Message----- From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Ray Van Dolson Sent: 23 December 2010 15:46 To: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Looking for 3.5" SSD for ZIL On Thu, Dec 23, 2010 at 07:35:29AM -0800, Deano wrote: > If anybody does know of any source to the secure erase/reformatters, > I’ll happily volunteer to do the port and then maintain it. > > I’m currently in talks with several SSD and driver chip hardware > peeps with regard getting datasheets for some SSD products etc. for > the purpose of better support under the OI/Solaris driver model but > these things can take a while to obtain, so if anybody knows of > existing open source versions I’ll jump on it. > > Thanks, > Deano A tool to help the end user know *when* they should run the reformatter tool would be helpful too. I know we can just wait until performance "degrades", but it would be nice to see what % of blocks are in use, etc. Ray _______________________________________________ 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
