Don, Try setting the zfs_scrub_delay to 1 but increase the zfs_top_maxinflight to something like 64.
Thanks, George On Wed, May 18, 2011 at 5:48 PM, Donald Stahl <d...@blacksun.org> wrote: > Wow- so a bit of an update: > > With the default scrub delay: > echo "zfs_scrub_delay/K" | mdb -kw > zfs_scrub_delay:200000004 > > pool0 14.1T 25.3T 165 499 1.28M 2.88M > pool0 14.1T 25.3T 146 0 1.13M 0 > pool0 14.1T 25.3T 147 0 1.14M 0 > pool0 14.1T 25.3T 145 3 1.14M 31.9K > pool0 14.1T 25.3T 314 0 2.43M 0 > pool0 14.1T 25.3T 177 0 1.37M 3.99K > > The scrub continues on at about 250K/s - 500K/s > > With the delay set to 1: > > echo "zfs_scrub_delay/W1" | mdb -kw > > pool0 14.1T 25.3T 272 3 2.11M 31.9K > pool0 14.1T 25.3T 180 0 1.39M 0 > pool0 14.1T 25.3T 150 0 1.16M 0 > pool0 14.1T 25.3T 248 3 1.93M 31.9K > pool0 14.1T 25.3T 223 0 1.73M 0 > > The pool scrub rate climbs to about 800K/s - 100K/s > > If I set the delay to 0: > > echo "zfs_scrub_delay/W0" | mdb -kw > > pool0 14.1T 25.3T 50.1K 116 392M 434K > pool0 14.1T 25.3T 49.6K 0 389M 0 > pool0 14.1T 25.3T 50.8K 61 399M 633K > pool0 14.1T 25.3T 51.2K 3 402M 31.8K > pool0 14.1T 25.3T 51.6K 0 405M 3.98K > pool0 14.1T 25.3T 52.0K 0 408M 0 > > Now the pool scrub rate climbs to 100MB/s (in the brief time I looked at it). > > Is there a setting somewhere between slow and ludicrous speed? > > -Don > -- George Wilson M: +1.770.853.8523 F: +1.650.494.1676 275 Middlefield Road, Suite 50 Menlo Park, CA 94025 http://www.delphix.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
