Re: [BackupPC-users] Backup backuppc

[Cesar K. <ka...@gm...>]

I am currently backing up BackupPc using rsync 3.0.6 to a USB2 drive  
with no problems so far.

The total amount of data being backed up is about 300 Gb with 5M files.

The total time to sync all the BackupPc directories to the USB disk is  
about 1 hour.

It's important to notice that the machine BackupPc runs is a Quad Xeon  
2.4 quite new. Before that, it was on an athlon desktop computer and  
it took about 6 hours to fully traverse the whole backuppc directory.



El 30/10/2009, a las 19:14, Jim Wilcoxson escribió:

> On 10/28/09, Chris Owen <chr...@ei...> wrote:
>>
>> Would like some advise on the best way to backup backuppc. I have a
>> 1TB  USB drive that I would like to copy all of our backups to. Has
>> anyone done this? How easy is it to roll back from USB?
>
> Hi Chris - I have a backup program in beta, HashBackup, that I've been
> testing with BackupPC trees, and a few BackupPC users have tried it.
> It runs on Linux, FreeBSD, PCBSD, and OSX (Mac).  One guy backed up
> his 500GB BPC tree with 31M files to a USB drive.  It took about 25
> hours, which isn't great, but it did work and could be restored (the
> restore took 16 hours), whereas rsync would not back it up and
> consumed gobs of memory trying.
>
> The beta site is:  http://sites.google.com/site/hashbackup
>
> In the latest release there is a new option, --linktree, to backup
> trees that are heavily hard-linked, like the BPC tree.  (The backup
> above did not use --linktree)  In experiments on a simulated BPC tree
> with 250K files, --linktree was 9x faster on ext3, 6x faster on xfs,
> 3x faster on jfs, and 30% faster on hfs (Mac).  I don't yet know if
> these speedup factors will hold on a really large BPC tree.
>
> If anyone would like to try HashBackup, the options to backup a BPC  
> tree are:
>
> $ hb backup -c <target dir> --no-compress --no-dupcheck --linktree / 
> var/backuppc
>
> The --linktree option is still new, and I'd appreciate the opportunity
> to work with anyone to optimize it for use on a real BackupPC tree.
> HashBackup only opens your BackupPC files for reading of course.
>
> Jim
>
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