Rory Campbell-Lange wrote:

> Currently I'm getting a throughput of around 10MB/sec to tape, which
> seems pretty low. iotop is showing reading off disk at around
> 17-20MB/sec and one of the 8 cores on this Xeon E5520 (2267MHz) is
> running at 100%. Hardware compression is disabled on the tape changer.
>
> Are there any obvious ways to improve this? Does the problem look like
> gzip, and if so is pigz (parallel gzip) an option?

Bacula compression is single threaded, so could we be the problem.

Why are you not using the hardware compression? It adds no throughput 
overhead.

Regards,

Richard

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