BackupPC-users

Re: [BackupPC-users] Backup of VM images

2011-06-07 12:48:02
Subject: Re: [BackupPC-users] Backup of VM images
From: Andrew Schulman <andrex AT alumni.utexas DOT net>
To: backuppc-users AT lists.sourceforge DOT net
Date: Tue, 07 Jun 2011 12:45:54 -0400
> If the file name & path is unchanged then BackupPC/rsync knows to
> compare it with the existing pooled file. The file has to be read and
> checksum'd on both ends (and possibly decompressed on the server side
> if using the cpool) and if there are *any* changes then a new version is
> constructed and written to the pool based on the delta and the
> existing pooled version. However, only the deltas and not the entire
> file is transferred across the slow WAN link -- which is the point of
> this thread.

OK, I think you're right.  I think I was thinking of a different case, of
backing up the backup file system to a remote site.  Thanks.


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