On Mon, 13 Dec 2010, Stephan Budach wrote:
My current run of bonnie is of course not that satisfactory and I wanted to ask you, if it's safe to turn on at least the drive level options, namely the write cache and the read ahead?
Enabling the write cache is fine as long as it is non-volatile or is flushed to disk when zfs requests it. Zfs will request a transaction-group flush on all disks before proceeding with the next batch of writes. The read ahead might not be all that valuable in practice (and might cause a severe penalty) because it assumes a particular mode and timing of access which might not match how your system is actually used. Most usage scenarios are something other than what bonnie++ does.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
