Hi,

On Thursday 22 November 2012 14:54:54 Jimmy Thrasibule wrote:
> On Thu, 2012-11-22 at 13:35 +0000, Paulo Almeida wrote:
> > I don't use Windows myself, but would it be possible to link the backup
> > to the computer shutdown, so that when a user turns off the computer, it
> > first performs the backup and then shuts down?
> I really like this idea. But I don't know neither if this possible.

If the machines concerned are capable of WoL, it should be easy to either have 
/bin/true as ping-command and and something around etherwake/"ssh <host> 
halt"(*) as pre- and post-commands.

(*) Or its windows version.

> > Would it be reasonable to do the backups during lunch, using backuppc's
> > blackout periods?
> It could be and it's already like this. However I noticed that BackupPC
> doesn't take in account blackout periods for the first backup. Is that
> normal?

The first backup is very important. If there is no previous backup or no backup 
recent enough, a backup is scheduled immediately unless you are fast in the 
gui to block backups for that machine for the needed hours.

> > There may be other solutions, outside the scope of backuppc, like
> > traffic shaping and throttling processes.
> I'm also thinking about this. But one other side effect is disk I/O
> usage when making a backup.

The main-problem for the machines being backuped up is not the network-traffic, 
its the disk-io and disk-latency when rsync checks the files and the directory-
structure (the same for smb/tar).

One of our clients just accepted that every four weeks there is a monday-
morning where the machine is a bit slow and the hdd make a bit of noise. They 
had a fatal dataloss in the past, maybe that helps with acceptance of regular 
backups.
The other clients use diskless thin-clients and work on a terminal-server 
where the backup runs at night...

Have fun,

Arnold

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