Re: [BackupPC-users] Backup software that does deltas

[Les M. <les...@gm...>]

Boniforti Flavio wrote:
> Hello Tyler,
> 
>> ZFS de-duplication won't be of any use to you. However, you 
>> can always use ZFS to extend the filesystem later with more 
>> disks. Otherwise, I'd recommend ext4.
> 
> OK, I'll stick with ext3 or ext4 (don't know if ext4 is supported in
> Debian Lenny).
> Could you simply explain to me (curiosity) why ZFS de-duplication would
> not have any meaning on my setup?

I don't have any real experience with ZFS de-dup but I'd expect it to help if 
(and only if) you back up large files with frequent small changes - and you turn 
  off backuppc's compression, perhaps enabling it in zfs.  Backuppc's pooling 
will already de-dup files that are completely identical, but if even one byte is 
different in a large file you will store a complete new copy each time. 
Block-level de-dup would share space for the identical blocks within the file. 
I think you do need a lot of ram on a 64-bit server to perform well, though. The 
zfs incremental send/receive function might also work to copy the pool.


Has anyone tried installing backuppc on a nexentastor server?


-- 
   Les Mikesell
    les...@gm...