[Aide] AIDE performance problems

[Paul Hessels]

I have a rather large dataset that I am running AIDE against. I am running
AIDE on my backup server that has a bunch of systems backups on it.  The
server in question has about 5TB of data and about 200 million files.

Currently its taking about 27 hours to run.  The system is 15 drives in
raid0 with XFS.

Oddly, the bottle neck doesn't seem to be disk.  iostat lists it as only
25% util.  Simple dd tests suggest that percentage is right for both
throughput and iops.

The CPU doesn't seem to be the bottleneck.  Its about 65% idle most of the
time.  The process seems to be sitting in the 'D' state most of the time.

The number of interrupts seems reasonable...

I don't know what to do next.  I need this to run in 20 hours or less.
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