Les Mikesell wrote at about 12:48:51 -0500 on Friday, September 11, 2009:
> Jeremy Mann wrote:
> > After 2 days of testing, if I leave off one server, BackupPC works as
> > advertised and does its job well. I'm currently backing up 28 servers and
> > finally it finishes overnight minus this one server. If enable this
> > server, the backups slow to a crawl and barely completely in 1 day.
> >
> > So this got me thinking, this one server has a directory that is 850GB. It
> > consists of user $HOME directories and program directories, so its a
> > mixture of small and large files.
> >
> > In the configuration I have 1 entry for this directory, which is /export.
> > I'm curious if should redo the configuration file and add a line for each
> > subdirectory. Would this speed it up?
>
> It will probably help, especially if you are using rsync and are short
> on RAM on either the server or the target. You may still have a problem
> with full runs because this does a read and checksum comparison over all
> the files but maybe you can get these started on a weekend cycle.
>
I'm not sure how much it will help, especially if you are using a
recent version of rsync that uses memory more efficiently. The rsync
problem that is usually encountered on this list is when backing up
BackupPC itself due to the unusually large number of hard links. I
would expect HOME directories to have few hard links and that memory
usage would not be limiting.
Of course try it and see... and report back...
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