> He already said he has SSD's for dedicated log. This > means the best > solution is to disable WriteBack and just use > WriteThrough. Not only is it > more reliable than WriteBack, it's faster. > > And I know I've said this many times before, but I > don't mind repeating: If > you have slog devices, then surprisingly, it actually > hurts performance to > enable the WriteBack on the HBA.
The HBA who gives us problem is a LSI 9200-16e which has no cache whatsoever. We do get great performances with a Dell H800 that has cache. We'll use H800s if we have to, but i really would like to find a way to make the LSI's work. Thanks! -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
