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Re: [rdiff-backup-users] back up to existing mirror acting strangely


From: Josh Nisly
Subject: Re: [rdiff-backup-users] back up to existing mirror acting strangely
Date: Mon, 04 May 2009 12:21:48 -0500
User-agent: Thunderbird 2.0.0.21 (X11/20090318)

rdiff-backup stores the modified time of files, and on subsequent runs compares modified time. However, on the first run rdiff-backup doesn't trust these times.

JoshN

John covici wrote:
OK, but on a normal backup (not the first time) it does not do this,
what makes it do it the first time and not other times?

on Monday 05/04/2009 Josh Nisly(address@hidden) wrote
> This is typical. rdiff-backup is checksumming each file's contents to > make sure that the file in the mirror is the same as the source file. > Since the data set is large, this will take a while. There really is no > way to tell rdiff-backup to skip files whose size matches, and I think > if you think it through, you'll agree that this is good. What if a log > file would change, but stay the same size? > > The only suggestion I have is to reduce the verbosity level, in case > rdiff-backup is spending a lot of expensive round-trips sending log > messages from the server to the client. > > JoshN > > John covici wrote:
 > > Hi.  I am using rdiff-backup 1.2.5 which is what is on Leni to backup
 > > to r remote site which contains an existing mirror of my local site
 > > except for a small number of files, but the mirror is quite large.
 > > What I am getting is  things like this in the log file:
 > > Getting signature of
 > > 
var/www/vhosts/wlym.com/web_users/australia/images/20081020_BostonUniversity.zip
 > > with blocksize 5440
 > >
 > > Sometimes it says getting delta and sometimes it says processing
 > > changed file and then copying attributes, but its never copying the
 > > files -- as it shouldn't, but whatever it thinks its doing, its taking
 > > a very long time and I wonder what it is trying to do and if there is
 > > any way to get it to skip all but files whose size, etc. is actually
 > > different?
 > >
 > > Thanks in advance for any ideas on this.
 > >
> >





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