[rabbitmq-discuss] Some quick configuration questions

Wed Jul 27 16:16:25 BST 2011

Hi Joseph,

On Wed, Jul 27, 2011 at 08:10:58AM -0700, Joseph Marlin wrote:
> I'd like to store persistent messages on a very large ISCSI volume, instead 
> of in /var/lib/rabbitmq/mnesia/. 
> 
> If I changed the environment variable 'RABBITMQ_MNESIA_BASE' to the ISCSI 
> volume, would that accomplish my goal and change the the location of my 
> future stored persistent messages?

Yes.

> What would happen to my currently store persistent messages upon restart 
> after making this change?

Nothing, but rabbit would not load anything from the old store - it
would start from a blank slate, so to speak. You could copy the contents
of /var/lib/rabbitmq/mnesia/ to your new location and then rabbit should
happily load it all up once you've changed RABBITMQ_MNESIA_BASE
appropriately - there's no storage of absolute paths in there at all, so
it should Just Work.

Matthew