carlos at fisica.ufpr.br
Tue May 17 11:46:12 MDT 2011
Matt McCutchen (matt at mattmccutchen.net) wrote on 17 May 2011 12:50:
>On Tue, 2011-05-17 at 08:45 -0700, CACook at quantum-sci.com wrote:
>> The connexion is Gb enet end-to-end, and is running at only 40Mb/s.
>> It has far more capacity than that. The only limiting factor I can
>> see is on the backup server one core of the CPU is running 100% rsync.
>> Clearly rsync is not multi-threaded.
>That's probably the delta-transfer algorithm.
Yes. And what's important is not the net flux, it's the transfer rate,
which can be a lot higher if there are few changes.
You might want to check the read rate at the server, it should be
in the hundreds of MB/s. If not rsync got stuck somewhere.
Multi-threading rsync is of little use because the the bottleneck will
be the disk IO.
More information about the rsync