Do you have any kernel processes running constantly?  Any taking near 100% of a 
CPU?

--rich

On Sep 20, 2010, at 14:24, Dave Cundiff <syshack...@gmail.com> wrote:

> Hi,
> 
> I have a btrfs backup system that has been running great. Its been
> backing up 6 systems with 500-750 gigs of data using Rsync and
> snapshots. Every night I snapshot the backup and overwrite it.
> Recently it has been unable to complete the backups. Its running soooo
> slow that it can barely finish 1 backup a day. When I first started
> backing up the systems they would all complete in at the most 8 hours.
> I noticed it started happening after I deleted a large number of
> snapshots. This caused the cleaner process to run for a few days.
> After it finished the filesystem has still been to slow to use.
> 
> I'm running kernel 2.6.36-rc4.
> 
> Filesystem was built with -m single -d single and using the compress
> mount option.
> 
> Block device is an Areca RAID5 with 4 Western Digital 2TB drives.
> 
> -- 
> Dave Cundiff
> System Administrator
> A2Hosting, Inc
> http://www.a2hosting.com
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