Re: rsync

[Matt Oates (Home)]

Hi Guerrier,

On 11 May 2011 23:37, guerrier <guerrier@gmail.com> wrote:
> Hello
> Can one use parallel to speed up rsync -avz dir1 dir2 ?  How would one
> phrase that?

Is parallel a great idea here?

If dir1 and dir2 local to a single file system then parallel will not
speed anything up, if anything it will slow it down causing lots of
context switches waiting on IO, you can just take out the z option too
as that will be gaining you nothing and wasting a fair amount of CPU
time. If it's a remote directory you kind of have the same problem as
your network will be the bottle neck this time, but parallel could
really speed up the compression/decompression step for this at each
end.

Matt.