> > We are currently recommending separate (ZFS) file systems for redo logs. > Did you try that? Or did you go straight to a separate UFS file system for > redo logs? > > I'd answered this directly in email originally. > > The answer was that yes, I tested using zfs for logpools among a number of > disk layouts and performance times were terrible on every one - no better > than using a main zpool and carving off /log slices. Performance times went > down (good) and disk %busy stayed low on all the ufs/directio setups. >
This is surprising. ZFS should do good with redo logs on a different pool. What are your iorates (iops/MB/s) for the log devices? Do you have a iostat for when you tried that? thanks, -neel _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
