Hello Bob, Wednesday, July 30, 2008, 3:07:05 AM, you wrote:
BF> On Wed, 30 Jul 2008, Robert Milkowski wrote: >> >> Both cases are basically the same. >> Please notice I'm not talking about disabling ZIL, I'm talking about >> disabling cache flushes in ZFS. ZFS will still wait for the array to >> confirm that it did receive data (nvram). BF> So it seems that in your opinion, the periodic "burp" in system call BF> completion time is due to ZFS's periodic cache flush. That is BF> certainly quite possible. Could be. Additionally he will end-up with up-to 35 IOs queued per each LUN and if he doesn't effectively have a nvram cache there the latency can dramaticly increase during these periods. -- Best regards, Robert Milkowski mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss