On Wed, 22 Oct 2008, Neil Perrin wrote: > > On 10/22/08 10:26, Constantin Gonzalez wrote: >> 3. Disable ZIL[1]. This is of course evil, but one customer pointed out to me >> that if a tar xvf were writing locally to a ZFS file system, the writes >> wouldn't be synchronous either, so there's no point in forcing NFS users >> to having a better availability experience at the expense of performance.
The conclusion reached here is quite seriously wrong and no Sun employee should suggest it to a customer. If the system writing to a local filesystem reboots then the applications which were running are also lost and will see the new filesystem state when they are restarted. If an NFS server sponteneously reboots, the applications on the many clients are still running and the client systems are using cached data. This means that clients could do very bad things if the filesystem state (as seen by NFS) is suddenly not consistent. One of the joys of NFS is that the client continues unhindered once the server returns. 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
