Subject RE: [firebird-support] Firebird Replication/Cluster with Fail over
Author Alan McDonald
> Hi All
>
> We currently are running 3 firebird (v1.5 classic) servers, one
> live , one fail-over and one DR site.
>
> The fail over gets a restore from a backup made every 2 hours on the
> live server (via Gbak)
> and the DR site gets a copy manually every thur
>
> This is obviously pretty inadequate, and no where near ideal for our
> company. (and at worse case the data's 2hours out of date if only an
> onsite problem with the main server, alot worse if the whole site is
> un-usable)
>
> we're a 24/7 call centre which needs a replicated fail over DB just
> incase etc (also one at a DR site connected via a rather slow adsl
> connection, but thats another matter possibly..)
>
> So I'm lookin for any help/idea's from you well clued up types :)
>
> FB is all pretty new to me and from what i can tell replicaton on it
> is pretty lousy (prove me wrong please!!)
> I've looked at the various options, and they all seem to run via
> triggers and only really replicate update/delete/insert statements.
> And im wary at the problems of sync'ed data should the wan link go
> down to our DR site.

I've been replicating my clients' databases for ten years now. They've never
had to hot swap in vein, only tests) but if they ever did they'd be a
maximum of 5 minutes behind. That's likely to be 2 minutes.
- triggers and only really replicate update/delete/insert statements -
what else IS replication? The beauty of this method is the disjointing
associated with the separation of file system methods. You get back to FB
client/server comms. With the core methods of replication, it's very easy to
immediately replicate a corruption and by the time you find out, it's too
late.
IBPhoenix.com has the list of available systems.
Alan

>
> Clustering seemed an option, but it seems from previous posts that
> this isnt much of an option due to the shared memory locks?
>
> Anyhow ideas/suggestions much appriecated.
>
>
>
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