On Tue, 29 Sep 2009, Bernd Nies wrote:
NFS writes from only one host are not the problem. Even with may small files it is almost as fast as a Netapp. Problem arises when doing the same parallel from n hosts. E.g. the same write from 10 hosts lasts 10 times longer. On the Netapp the same from 10 hosts takes only 2-3 times longer. Network bandwith is also not the problem here.
Striping across two large raidz2s is not ideal for multi-user use. You are getting the equivalent of two disks worth of IOPS, which does not go very far. More smaller raidz vdevs or mirror vdevs would be better. Also, make sure that you have plenty of RAM installed.
What disk configuration (number of disks, and RAID topology) is the NetApp using?
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
