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Re: [Bug-tar] high sys-load

From: Jan-Benedict Glaw
Subject: Re: [Bug-tar] high sys-load
Date: Tue, 12 May 2009 17:31:12 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

On Tue, 2009-05-12 16:08:38 +0200, Jan-Florian Hilgenberg [Alfahosting GmbH] 
<address@hidden> wrote:
> we have some trouble with high sys-load, if we are packing a large  
> amount of small files in a tar archiv. the cpu usage is low - but the  
> loadavg is unacceptable high.

This is probably your storage system going nuts. You'd easily check:

# cd /path/to/backup/source
# find . -type f -exec cat {} \; > /dev/null &

This basically reads all files. If you see the same load pattern
(compared to a real backup run), it's your storage system.

What exact OS version / kernel version / filesystem / filesystem mount
options are you using? Maybe there's a lot that can be tuned...


      Jan-Benedict Glaw      address@hidden              +49-172-7608481
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