Win 2k3 co-located server and Linux Samba Mirrors

[Matt Graham]

From: Alex Dean <alex at crackpot.org>
> On Apr 9, 2012, at 11:42 PM, Stephen wrote:
>> ok here is something i haven't considered in this way.
>> Openfiler with drbd
> drbd is great if both cluster nodes are in the same data center.
> Over the internet… not so much. The latency will kill your
> performance. Check it out for your scenario, though. If you have
> the right pre-requisites, drbd is pretty great.

However, DRBD is basically "replicate one block device to one other block
device".  There's not much support for 3-node setups.  (Stacked resources
allow you to do this, but it looks like a total pain.)  Also, DRBD's
dual-primary mode will only work right if multicast is enabled on your network
and you're using OCFS2 or GFS2 on the device and running the distributed lock
manager.  OCFS2/GFS2 are slower than ext3 because of locking/replication/the
paranoia of making sure everything's always consistent on both nodes.

I'd say that a solution would probably involve regular rsyncs instead of DRBD,
given that the original post mentioned multiple sites.

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Matt G / Dances With Crows
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