I'll give this a script a shot a little bit later today. For ZIL sizing, I'm using either 1 or 2 32G Intel X25-E SSDs in my tests, which, according to what I've read, is 2-4 times larger than the maximum that ZFS can possibly use. We've got 32G of system memory in these Thors, and (if I'm not mistaken) the maximum amount of in-play data can be 16G, 1/2 the system memory.
Also, because I know people will be asking, has anybody ever tried to recover from something like a system crash with a ZFS pool that has the ZIL disabled? What kind of nightmares would I be facing in such a situation? Would I simply just risk losing that in-play data, or could more serious things happen? I know disabling the ZIL is an Extremely Bad Idea, but I need to tell people exactly why... -Greg Jim Mauro wrote: > You have SSD's for the ZIL (logzilla) enabled, and ZIL IO > is what is hurting your performance...Hmmm.... > > I'll ask the stupid question (just to get it out of the way) - is > it possible that the logzilla is undersized? > > Did you gather data using Richard Elling's zilstat (included below)? > > Thanks, > /jim <snip> _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
