[CentOS] Rsync and differential Backups

Tue Nov 10 08:18:21 UTC 2015
John Logsdon <j.logsdon at quantex-research.com>


I have been using rsnapshot for years now. The only problem I've found is
that it is possible to run out of inodes. So my heads-up is that when you
create the file system, ensure you have more than the default inodes - I
usually multiply the default by 10. Otherwise you can find your 1Tb USB
drive failing after 259Mb and you can't then recover the files. Rather

> On Mon, Nov 9, 2015 at 9:31 PM, Alessandro Baggi
> <alessandro.baggi at gmail.com> wrote:
>> Hi list,
>> how to perform a differential backup using rsync?
>> On web there is a great confusion about diff backup concept when
>> searched
>> with rsync.
>> Users says diff because it copy only differences. For me differential is
>> backup from last full backup.
> You can use "newer" options of the find command and pass the file list
> to rsync or scp to "backup" only those files that have changed since
> the last run.  You can keep a file like .lastbackup and timestamp it
> (touch) at the start of the backup process.  Next backup you compare
> the current timestamp with the timestamp on this file.
> HTH,
> -- Arun Khan
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Best wishes


John Logsdon
Quantex Research Ltd
+44 161 445 4951/+44 7717758675