On Fri, 13 Jun 2008, Richard L. Hamilton wrote: > Hmm...my SB2K, 2GB RAM, 2x 1050MHz UltraSPARC III Cu CPU, seems > to freeze momentarily for a couple of seconds every now and then in > a zfs root setup on snv_90, which it never did with mostly ufs on snv_81; > that despite having much faster disks now (LSI SAS 3800X and a pair of > Seagate 1TB SAS drives (mirrored), vs the 2x internal 73GB FC drives; > the SAS drives, at a mere 7200 RPM can sustain a sequential transfer > rate about 2.5x that of the 10KRPM FC drives!).
Did you enable compression in the filesystem? Do the freezes occur while writing files at high rates? I have tested zfs compression here on a Solaris 10U4 system and notice that when data is written at a high rate, the user interface tends to become quite jerky. It seems that compression is best reserved for read-mostly filesystems and not for working data. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], 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
