Adam N. Copeland wrote: > Thanks for the replies. > > It appears the problem is that we are I/O bound. We have our SAN guy > looking into possibly moving us to faster spindles. In the meantime, I > wanted to implement whatever was possible to give us breathing room. > Turning off atime certainly helped, but we are definitely not completely > out of the drink yet. > > I also found that disabling the ZFS cache flush as per the Evil Tuning > Guide was a huge boon, considering we're on a battery-backed (non-Sun) SAN. >
Really? Which OS version are you on? This should have been fixed in Solaris 10 5/08 (it is a fix in the [s]sd driver). Caveat: there may be some devices which do not properly negotiate the SYNC_NV bit. In my tests, using Solaris 10 5/08, disabling the cache flush made zero difference. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
