Rsync - slow performance problem...

Gary Mansell Gary.Mansell at
Tue Oct 4 11:25:46 GMT 2005


I am running rsync (rsync-2.6.3-1) on CentOS 4 (2.6.9-11.EL).

I notice that the performance is pretty slow ranges between 2 and 6

The command that I use from a remote machine to this, the archiving
host, is:

rsync -avz -e ssh ./dir archsrv:/archive/DATA

An investigation with top shows that the system is cpu bound rather than
IO bound and that the sshd process is consuming 75% of the CPU compared
to the rsync process which uses about 25%.

Why is ssh using so much CPU? It seems wrong to me. I would expect rsync
to be using most as it has to do compression.

Any Ideas?

Best Regards

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