BackupPC-users

Re: [BackupPC-users] Using rsync for blockdevice-level synchronisation of BackupPC pools

2009-09-09 06:16:56
Subject: Re: [BackupPC-users] Using rsync for blockdevice-level synchronisation of BackupPC pools
From: Christian Völker <chrischan AT knebb DOT de>
To: "General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>
Date: Wed, 09 Sep 2009 12:12:46 +0200
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Hi,

> I'd say: Replace that USB 2.0 disk by something else like something
> connected via Firewire or eSATA. USB 2.0 is very, very slow, especially
> for random access.
I know, but that's not the point here. Speed doesn't concern me- the
copy should later go over a slow link anyways. And for this link USB2.0
is fast enough.


> Do you want to try DRBD and see how that works? Might be a more complex
> setup though..
I had this in mind- but as it should go over a small line I preferred to
figure out the amount of data first.

>> Looks like on my pool BackupPC changes approx two third of the whole
>> pool daily. So if I would transfer to a remote site I'd need to transfer
>> 300GB daily!
> That sounds far too much for a 540 GB pool. Did you try again the next
> day?
It matches my experience with the dump utility. I created the second one
with a size of 300GB after a day. And the next day again. And so on...

Any possible ways to verify why this is so many data? I moutned the pool
with "noatime,data=ordered" for ext3.

> But there is currently no out-of-the-box or best practice to transfer a
> BackupPC pool to a remote location.
I know. For this I wanted to share my experience here.

Greetings


Christian
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