While exploring the Solace's MQ product, I came across the term SAN:
"When receiving applications are disconnected or can’t keep up with the flow of messages, their backlog is pushed to a SAN".
From: http://solacesystems.com/products/mq-messaging
I assume it's somehow relates to memory storage, but I would be happy to get a full explanation about it.
It isn't "Storage Area Network"? ( http://en.wikipedia.org/wiki/Storage_area_network )