Backup Central

Greetings!

Now that I have discovered and resolved the many problems I was experiancing with my backuppc installation, I'm happy to report that things are working well.

Now I have a couple of questions.

1. What is the behavior of Backuppc when it is killed and restarted? For example, I have a VERY LARGE backup on my backuppc: 250 Gigs as a full backup. At this moment, the backup is complete, but it is currentling doing the backuppc_link stage. What happens if I want to reboot the box in order to apply a new kernel while this is happening? Will Backuppc pick up where it left off, or will it have to start from scratch? What about if it's performing a full or incramental backup and we had to kill the proccess?

2. Is there an official Wiki for Backuppc?

Thanks again,

--Matt




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Matthew Ross writes:

Now I have a couple of questions.

1. What is the behavior of Backuppc when it is killed and restarted?
For example, I have a VERY LARGE backup on my backuppc: 250 Gigs
as a full backup. At this moment, the backup is complete, but it
is currentling doing the backuppc_link stage. What happens if I
want to reboot the box in order to apply a new kernel while this
is happening? Will Backuppc pick up where it left off, or will it
have to start from scratch? What about if it's performing a full
or incramental backup and we had to kill the proccess?

Existing backups will be canceled - a SIGINT is sent and each
backup will stop. In 2.1.0 that will result in a partial backup
being saved if a full backup was interrupted.

BackupPC_link is a bit more problematic. It will restart its
work, and since potentially many links will already be in the
pool (from its previous partial run), it will need to do a
full file compare to verify each link it makes. So it will
run slower after restart. It should still complete correctly.
(The behavior here could be improved in a future version.)

So, overall, interrupting BackupPC should be ok, but it is
not well tested in this area, so it is discouraged.

2. Is there an official Wiki for Backuppc?

No. But I have finally made a start on the FAQ at

http://backuppc.sourceforge.net/faq

I guess a Wiki might be a good idea, but I want to keep a
high signal-to-noise ratio.

Craig


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