Re: [vserver] Poll: High (ish) availability - how are you doing it?

From: Remigiusz Modrzejewski <lrem_at_sphere.pl>
Date: Tue 27 Jul 2010 - 16:29:52 BST
Message-Id: <70CA00EB-6E0B-49EB-970B-4DBD75A2ADB9@sphere.pl>

On Jul 27, 2010, at 16:32 , Gordan Bobic wrote:
>
>> I would be interested in any systems
>> people have experienced that do an async replication between two
>> machines, eg some process which uses inotify/dazuko/redirfs to watch for
>> changes and then an async queue to merge changes to the second machine -
>> the goal being to have a near realtime replica, but without the
>> performance penalty associated with cluster filesystems?
>
> It sounds like you are looking for lsyncd.
>
> [...]
>> A more satisfactory solution seems to be active-active clustering. This
>> is now irrelevant to linux-vserver, but does anyone here have any
>> experience of running active-active clusters of mailservers, webservers,
>> etc?

Well, an excerpt from the front page of lsyncd reads:

#v+
When not to use:

File with active file handles (e.g. database files) Directories where many changes occur (like mail or news servers)

In these cases e.g. DRBD (see http://www.drbd.org) might be better for you.
#v-

So if the OP is planning to use it for mail servers, lsyncd may not be a good idea. Anyhow thanks
for pointing it :)

Kind regards,
Remigiusz Modrzejewski
Received on Tue Jul 27 16:30:05 2010

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