On Wed, 29 Jul 2009, Jorgen Lundman wrote:
For example, I know rsync and tar does not use fdsync (but dovecot does) on its close(), but does NFS make it fdsync anyway?
NFS is required to do synchronous writes. This is what allows NFS clients to recover seamlessly if the server spontaneously reboots. If the NFS client supports it, it can send substantial data (multiple writes) to the server, and then commit it all via an NFS commit. Note that this requires more work by the client since the NFS client is required to replay the uncommited writes if the server goes away.
Sorry for the giant email.
No, thank you very much for the interesting measurements and data. 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
