Re: [rdiff-backup-users] Ways to speed rdiff-backup?

[Stelios K. Kyriacou]

Thanks for the answer. It made me understand that it is not
rdiff-backup's problem but something else.

I think the problem was that I was using NFS rather than an ssh call and
there seems to be problems with NFS at least with my system here. I saw
for example that rdiff-backup was spending a lot of time in a "D" STATE
(uninterruptible sleep) -- i found that using top.
I changed my script to use ssh (using "::") and now the time
was only 50 minutes rather than 9 hours. Still about 8 times
slower than plain rsync but much better than before. Problem solved.

My best wishes to all for the new year.
Stelios


On Tue, 31 Dec 2002, Ben Escoto wrote:

> On Mon, Dec 30, 2002 at 03:56:12PM -0500, Stelios K. Kyriacou wrote:
> > I would like to ask for some more intelligent people to explain to me
> > why rdiff-backup seems to take from 6 hours up to 16 hours (avegage maybe
> > 7 hours) for backing a 50GB filesystem in
> > which only 150 files (just an example) have changed?
> >
> > compare with: In contrast the rsync-based mirror finishes in 10 minutes I
> > do know that i am comparing differnt beasts :-) but wanted to mention it
> > anyway
>
> I'm not sure what the problem is.  Is rdiff-backup CPU limited (on
> either computer is rdiff-backup consistently using up a lot of CPU)?
> About rsync vs rdiff-backup I just performed some tests which I will
> report on in the next email.  But it is definitely taking more time
> than it should for you.  Could you post one of your session_statistics
> files?
>
>
> --
> Ben Escoto
>