Incidentally, this is part of how QFS gets its performance for streaming I/O. We use an "allocate forward" policy, allow very large allocation blocks, and separate the metadata from data. This allows us to write (or read) data in fairly large I/O requests, without unnecessary disk head motion.
I believe ZFS allocate forward both data and metadata but I don't think this causes unnecessary disk head motion. -r _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
