Annie Li writes: > Can anyone help explain what does "out-of-order issue" mean in the > following segment? > > ZFS has a pipelined I/O engine, similar in concept to CPU pipelines. The > pipeline operates on I/O dependency graphs and provides scoreboarding, > priority, deadline scheduling, out-of-order issue and I/O aggregation. > I/O loads that bring other filesystems to their knees > <http://blogs.sun.com/roller/page/bill?entry=zfs_vs_the_benchmark> are > handled with ease by the ZFS I/O pipeline. > > > Thanks, > Annie > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
As an example, it says that, even if a read was issued by an application 'after' ZFS had started to work on a group of write I/Os, the read could actually issue ahead of some of the writes. -r _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
