[CentOS] Deduplication data for CentOS?

Tue Aug 28 19:04:13 UTC 2012
John R Pierce <pierce at hogranch.com>

On 08/28/12 11:41 AM, Les Mikesell wrote:
> On Tue, Aug 28, 2012 at 3:03 AM, Rainer Traut<tr.ml at gmx.de>  wrote:
>>> >>
>> >Rsync is of no use for us. We have mainly big Domino .nsf files which
>> >only change slightly. So rsync  would not be able to make many hardlinks. :)
> Rdiff-backup might work for this since it stores deltas.   Are you
> doing something to snapshot the filesystem during the copy or are
> these just growing logs where consistency doesn't matter?

NSF files are a proprietary database format used by Lotus Notes and 
Domino, very complex, there's a pile of versions, and they are totally 
opaque.  Pretty sure that if they are being accessed or updated while 
being copied the copy is invalid, so yes, some form of snapshotting is 
required.

commercial backup software uses Domino/Notes APIs to do incremental 
backups, for example 
http://www.symantec.com/business/support/index?page=content&id=TECH46513



-- 
john r pierce                            N 37, W 122
santa cruz ca                         mid-left coast