kern/142365: [geom] FreeBSD RAID1 (gmirror) is much slower than Linux RAID1!

[delphij at FreeBSD.org]

Synopsis: [geom] FreeBSD RAID1 (gmirror) is much slower than Linux RAID1!

State-Changed-From-To: open->feedback
State-Changed-By: delphij
State-Changed-When: Wed Jan 6 00:01:54 UTC 2010
State-Changed-Why: 
Dear submitter,

There is an important performance improvement available in
a newer -STABLE snapshot.  If you don't want to build a
kernel yourself, you may try the snapshot build which
can be found at:

	http://www.freebsd.org/snapshots/

(The 200912 build for 7.x and 8.x and 9.x included the
enhancement)

Please, let us know if that would help with your configuration.
Note that for existing installation you will need to set the
load balancing algorithm to 'load' on the gmirror device by
doing something like:

	gmirror configure -b load gm0

Before doing another set of benchmark.

Thanks in advance!

http://www.freebsd.org/cgi/query-pr.cgi?pr=142365