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<  RabbitMQ mailing list  ~  Making backups of RabbitMQ state?
Guest
Posted: Tue Nov 03, 2009 9:48 am Reply with quote
Guest
Hi,

I am having a little bit of trouble figuring out what the proper backup procedure for the RabbitMQ state would be.

For the configuration (vhosts, users, exchanges, queues, etc.) I can use the normal Mnesia backup and restore. That I understand.

But for the persistant messages I am not so sure. How is the rabbit_persister.LOG managed? Can I just take a backup copy of it whenever, or may I only take one of the rabbit_persister.LOG.previous? Where would I look to find out how often it is rolled? Can I trigger a manual roll?

Any pointers are highly appreciated.

Thanks,
Robby


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Guest
Posted: Thu Nov 05, 2009 9:13 am Reply with quote
Guest
Robert,

Robert Raschke wrote:
> But for the persistant messages I am not so sure. How is the
> rabbit_persister.LOG managed? Can I just take a backup copy of it
> whenever, or may I only take one of the rabbit_persister.LOG.previous?

I'd back up both files. It should be possible to restore the
rabbit_persister.LOG from a backup even when that backup was taken in
the middle of an append - I haven't tested that though. The .previous
log is needed in case the backup takes place while the log is being rolled.

> Where would I look to find out how often it is rolled?

The logic for deciding when to roll the log is rather complex.

> Can I trigger a manual roll?

rabbit_persister:force_snapshot() in the Erlang shell does the trick.


Regards,

Matthias.

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