If anyone has specific SSD drives they would recommend for ZIL use would you mind a quick response to the list? My understanding is I need to look for:
1) Respect cache flush commands (which is my real question...the answer to this isn't very obvious in most cases) 2) Fast on small writes It seems even the smallest sizes should be sufficient. This is for a home NAS where most write work is for iSCSI volumes hosting backups for OS X Time Machine. There is also some small amount of MySQL (InnoDB) shared via NFS. >From what I can gather workable options would be: - Stec which are in the 7000 series and extremely expensive - Mtron Pro 7500 16GB SLC which seem to respect the cache flush but aren't particularly fast doing it http://opensolaris.org/jive/thread.jspa?messageID=459872&tstart=0 - Intel X-25E with the cache turned off which seems to be like the Mtron - Seagate's marketing page for their new SSD implies it has a capacitor to protect data in cache like I believe the Stec does. But I don't think they are available at retail yet. "Power loss data protection to ensure against data loss upon power failure" http://www.seagate.com/www/en-us/products/servers/pulsar/pulsar/ And what won't work are: - Intel X-25M - Most/all of the consumer drives prices beneath the X-25M all because they use capacitors to get write speed w/o respecting cache flush requests. Is there anything that is safe to use as a ZIL, faster than the Mtron but more appropriate for home than a Stec? Maybe the answer is to wait on Seagate, but I thought maybe someone has other ideas. Thanks, Ware _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
