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Re: Backup from huge Maildirs

From: Michelle Konzack <linux4michelle(at)freenet.de>
Date: Thu Sep 13 2007 - 11:27:25 EDT

Am 2007-09-04 07:26:26, schrieb Maarten Vink:
> For this setup, rsync might not be the best solution. As someone mentioned
> earlier, splitting the rsync so that it runs separately for each user will
> probably speed things up.

I do this already... and since I use Courier, I process each Mailfolder seperatly, which mean, rsync is looking for nor more then ~20.000 messages at once. running rsync on ~/Maildir and hiting MY own Maildir will eat the WHOLE memory and CPU-Resources of this FileServer.

> Looking forward, you might want to try this if you have some free,
> unpartitioned diskspace (or a spare server):
> - Set up DRBD on two servers
> - Use LVM on top of the DRBD device
> - Use the LVM tools to create periodic snapshots of your mail partition
>
> This way any changes are synchronised to the second server as they happen
> (via DRBD), and you can recover old data almost instantly (by mounting one
> of your snapshots).

But this mean, my Backup-Server must have the same Diskspace as the FileServer. but since I use my Backup-Server for more then one Machine (exactly 126 currently) DRBD is no real solution...

Even if I use 1TByte Drives (where the performance is ok, because it will be only used as storage meduim for backups), I need too much drives.

Thanks, Greetings and nice Day

    Michelle Konzack
    Systemadministrator
    Tamay Dogan Network
    Debian GNU/Linux Consultant

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Received on Thu Sep 13 11:31:53 2007

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