Re: [Bacula-users] Copy Job performance issues
2010-12-07 07:22:32
2010/12/7 Christoph Litauer <litauer AT uni-koblenz DOT de>
I can see no bottleneck at all ... but "status storage" still reports 40MB/s write performance.
AFAIK, when bacula-sd run a copy job it perform this by single thread, synchronous. So, bacula-sd read a block from source volume, then write it into destination volume, repeats until end of source volume.
This leads to about a half of expected throughput.
There was a thread on bacula-devel list about it: "slow copying from tape to tape." At this thread Kern confirmed a possible improvement:
Yes, I am working on this now (a very low priority project for the moment) but
it will probably only be in the Enterprise version and not in the community
version.
bye
-- Radosław Korzeniewski radoslaw AT korzeniewski DOT net
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