Christian Völker wrote at about 22:13:24 +0100 on Tuesday, January 13, 2009:
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 > Yohoo!
 > 
 > I'm having an issue with my BackupPC.
 > 
 > One of the machines to be backed up is a remote box. Unfortunately the
 > BackupPC box only has very limited external download bandwith (384kb/s).
 > 
 > Usually (and thanks to rsync!) this isn't an issue.
 > 
 > But now there is a 4GB file on the remote box- and the broadband
 > connection is dropped every 24h hours (f!ck Telekom), so any running
 > backup process will fail.
 > 
 > This means unless there is really no traffic on the connection a backup
 > will never succeed- am I right? Looks like, because I'm watchingthis now
 > for a couple of days.
 > 
 > Whatever, because I have this file locally as well (same file, md5sum
 > and times are the same!) can I "insert" tthis file somehow into my
 > backupPC under /var/lib so it recognizes it as "already there"and does
 > not try to backup all the time?
 > 
 > Thanks for further ideas.
 > 
The following "kludge" should work.

1. Create a new temporary backuppc host that points to your local
   machine. Set up the corresponding 'share' so it only backs up the
   4GB file you have locally. This will give you a valid (c)pool
   backup of that file.

2. Then run backuppc on your remote machine and it will create a
   hard-link to the now already existing pool file.

3. Delete the temporary host config and the corresponding tree under
   TopDir.

Alternatively, you could cobble together a routine for directly
injecting a file into the pool or cpool (by calculating the md5sum
name and compressing as appropriate). Be sure to either add an extra
temporary link to it or keep BackupPC_nightly from running until you
do a real backup of the remote machine or otherwise the pool entry
will be dropped.


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