Sorry, ZFS does not do dedup yet either. Ignore me.
brian-
Marek.M.Stopka AT tieto DOT com wrote:
> Yeah it will, but when new full backup is taken, you again copy entire
> operating system copy over network, even though you have already a few copy
> of that operating systém on a target server. So, yeah it will low the
> traffic, but not that much as a smarter solution could. :-) Every time you
> také full backup, all data will be transfared, every time you will do a
> incremental backup you will transfer all files those were changet from last
> backup even though there were only added few bytes to the end of a file, and
> well... Maybe that is good for you, but I would be much more grateful for
> something that would do completely deduplicated replication as you can get
> for example from NetApp :)
>
> Yeah, I agree that your solution is 1000 times simplier, but also it is less
> effective than a deduplicated replication, that I hope can get with lessfs +
> DRBD... And yeah, my idea works only in theory, your is really working. :-)
>
> -----Original Message-----
> From: John Drescher [mailto:drescherjm AT gmail DOT com]
> Sent: Thursday, October 15, 2009 4:08 PM
> To: Stopka m Marek; bacula-users
> Subject: Re: [Bacula-users] Copying backup "On the fly"
>
>
>> This is not a solution at all, because Bacula every time you create new
>> backup will create new virtual tapes, and since rsync "deduplicate" only
>> files, not entire amount of data that is going to be transfared, this do not
>> solve anything for us. Acctually I am not even sure if we would use LVM on
>> botom and rsync those snapshots of a LVM volumes, I guess rsync do not
>> compare hashes of all blocks of transfered but only first block hash with a
>> first block, second with a second,... So again, rsync would not be help even
>> in this case.
>>
>>
>
> I am confused how it does not solve the problem. I am talking about using
> rsync to mirror the volume files that bacula uses to store all of your
> backups. If you limit the size of these to a few GB, rsync will only be
> sending the volumes that have changed but you will still have a complete
> second copy of the bacula volumes offsite.
>
> John
>
>
>
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