Re: [BackupPC-users] rsync: incremental vs. full backups

On Wed, 20 Jun 2012 11:02:51 -0500, Les Mikesell <lesmikesell AT gmail DOT com>
wrote:
> timestamps and length match.    If you have checksum caching enabled,
> after the 2nd full the server side will not have to read/uncompress
> the data of unchanged files but the target system still has to do the

        If you dont know what is the checksum caching, add this to the
rsync options:

--checksum-seed=32761

> read.  Also, rsync sends the entire directory listing before starting
> which might be a problem if your server does not have much RAM or does
> many backups concurrently.

        depending also the number of disks and their connection
(sata/esata vs usb or network/iscsi) you may have too much 
parallel backups.

        Use the vmstat and iostat to monitor your server and check
where you might have a bottleneck.

good luck
higuita
-- 
Naturally the common people don't want war... but after all it is the
leaders of a country who determine the policy, and it is always a 
simple matter to drag the people along, whether it is a democracy, or
a fascist dictatorship, or a parliament, or a communist dictatorship.
Voice or no voice, the people can always be brought to the bidding of
the leaders. That is easy. All you have to do is tell them they are 
being attacked, and denounce the pacifists for lack of patriotism and
exposing the country to danger.  It works the same in every country.
           -- Hermann Goering, Nazi and war criminal, 1883-1946

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