No problem. I didn't use mirrored slogs myself, but that's certainly a step up for reliability.
It's pretty easy to create a boot script to re-create the ramdisk and re-attach it to the pool too. So long as you use the same device name for the ramdisk you can add it each time with a simple "zpool replace pool ramdisk" On Thu, Oct 23, 2008 at 1:56 PM, Constantin Gonzalez <[EMAIL PROTECTED]> wrote: > Hi, > > yes, using slogs is the best solution. > > Meanwhile, using mirrored slogs from other servers' RAM-Disks running on > UPSs > seem like an interesting idea, if the reliability of UPS-backed RAM is > deemed > reliable enough for the purposes of the NFS server. > > Thanks for siggesting this! > > Cheers, > Constantin > > Ross wrote: >> >> Well, it might be even more of a bodge than disabling the ZIL, but how >> about: >> >> - Create a 512MB ramdisk, use that for the ZIL >> - Buy a Micro Memory nvram PCI card for £100 or so. >> - Wait 3-6 months, hopefully buy a fully supported PCI-e SSD to replace >> the Micro Memory card. >> >> The ramdisk isn't an ideal solution, but provided you don't export the >> pool with it offline, it does work. We used it as a stop gap solution for a >> couple of weeks while waiting for a Micro Memory nvram card. >> >> Our reasoning was that our server's on a UPS and we figured if something >> crashed badly enough to take out something like the UPS, the motherboard, >> etc, we'd be loosing data anyway. We just made sure we had good backups in >> case the pool got corrupted and crossed our fingers. >> >> The reason I say wait 3-6 months is that there's a huge amount of activity >> with SSD's at the moment. Sun said that they were planning to have flash >> storage launched by Christmas, so I figure there's a fair chance that we'll >> see some supported PCIe cards by next Spring. >> -- >> This message posted from opensolaris.org >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > -- > Constantin Gonzalez Sun Microsystems GmbH, > Germany > Principal Field Technologist > http://blogs.sun.com/constantin > Tel.: +49 89/4 60 08-25 91 > http://google.com/search?q=constantin+gonzalez > > Sitz d. Ges.: Sun Microsystems GmbH, Sonnenallee 1, 85551 > Kirchheim-Heimstetten > Amtsgericht Muenchen: HRB 161028 > Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Dr. Roland Boemer > Vorsitzender des Aufsichtsrates: Martin Haering > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
