On Tue, 2010-07-27 at 17:29 +0200, Remigiusz Modrzejewski wrote:
> 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 :)
You're welcome. :)
You are forgetting, however, is that the OP also mentioned using rsync
for keeping things in sync, and lsyncd is a least a slightly cleaner
solution that rsyncing the whole machine in a cron job.
Gordan
Received on Tue Jul 27 16:34:40 2010