On Mon, Dec 22, 2008 at 1:29 PM, J-P <jphml AT videotron DOT ca> wrote:
> Hi everybody,
>
> I'm having speed/jamming issue when writing to my Dell PV124T which *seems*
> to be related to Bacula. Basically, speed is really inconsistent, as in:
>
>  Elapsed time:           10 secs
>  SD Bytes Written:       920,245,603 (920.2 MB)
>  Rate:                   92024.6 KB/s
>
>  Elapsed time:           40 mins 53 secs
>  SD Bytes Written:       72,574,315,017 (72.57 GB)
>  Rate:                   29585.9 KB/s
>
>  Elapsed time:           33 mins 40 secs
>  SD Bytes Written:       2,402,398,034 (2.402 GB)
>  Rate:                   1189.3 KB/s
>
>  Elapsed time:           1 hour 10 secs
>  SD Bytes Written:       18,271 (18.27 KB)
>  Rate:                   0.0 KB/s
>
> As you can see, the fastest is around 89 MB/s, but that is one of twenty
> something migration. Now, that said, I've been testing multiple runs using
> "dd if=/dev/zero of=/dev/nst0" and results are pretty consistent (between
> 120 - 143 MB/s).
>

Are these all full backups. Anything other than fulls will not get
good performance because the client OS will spend most of its time
searching for the files to backup.

John

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