Subject: Re: High interrupt CPU usage with amanda backup on a SPARCclassic
To: Francis Devereux <>
From: Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
List: port-sparc
Date: 02/08/2003 19:22:05
At 21:55 Uhr +0000 6.2.2003, Francis Devereux wrote:
>I have a SPARCclassic that I am using as an amanda backup server.  It has an
>external 1GB SCSI disk and HP C1537A DDS-3 tape drive.  It is running NetBSD

What is the nominal throughput of that DDS-3 streamer?

Do you run it with HW compression enabled or not (you should not)?

>When the amanda is backing up over the network the CPU usage is very high
>(see top output below), mainly interrupt and system,

Did you set up Amanda with client-side or server-side compression?

>and the tape keeps stopping and starting. Is this normal, or is there any
>way I can make the backup go faster?

Do you use a holding disk in your setup (you should)? What size?


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