On Fri, 2007-05-11 at 09:00 -0700, lonny wrote: > I've noticed a similar behavior in my writes. ZFS seems to write in bursts of > around 5 seconds. I assume it's just something to do with caching?
Yep - the ZFS equivalent of fsflush. Runs more often so the pipes don't get as clogged. We've had lots of rain here recently, so I'm sort of sensitive to stories of clogged pipes. > Is this behavior ok? seems it would be better to have the disks writing > the whole time instead of in bursts. Perhaps - although not in all cases (probably not in most cases). Wouldn't it be cool to actually do some nice sequential writes to the sweet spot of the disk bandwidth curve, but not depend on it so much that a single random I/O here and there throws you for a loop ? Human analogy - it's often more wise to work smarter than harder :-) Directly to your question - are you seeing any anomalies in file system read or write performance (bandwidth or latency) ? Bob _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
