http://en.wikipedia.org/wiki/DRBD

2009/11/20 Christian Völker <chrischan AT knebb DOT de>:
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> Hi,
>
>> I've been actually wondering what's the best way to keep a clone of the
>> pool directory, because I want to do an off-site copy now and then.
> Welcome. This is one of the most discussed topics in this list...
>
>> What do you suggest as a physical storage architecture with an off-site
>> weekly clone?
> Of course this depends on the # of files you have in your pool and it's
> current size. As smaller both numbers are as better your chances for a
> proper solution.
>
> Re the physical I'd strongly recommend to put it on a redundant RAID
> array (RAID5 or better RAID1- if you want additional performance RAID50
> or RAID10). Just wondering why you have a backup if s single disk fail
> destroys it all...
>
> Then I'd automatically clone the pool (best with dd, but again depends
> on pool size) to one external USB drive. Then bring the USB drive to an
> external location and connect the second USB to BackupPC to get the
> image backup of the upcoming week. And so far. So you'll always have an
> offsite backupc - even if the current copy breaks it all.
>
> Re rsync tool, I'd not recommend to use. It sounds good, but due to the
> nature of the pool it might take days (!) to sync properly 'coz of all
> the hardlinks.
>
> Greetings
>
> Christian
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