Comment by inhumantsar

In 2013 I was working for a mobile game company that dropped a metric shitload of cash in Big Blue's lap for an enormous "RAM SAN".

IIRC it was a 1 or 2U unit with a few small lithium ion batteries inside. Phenomenal unit. It could have been configured as a block device but we used it for hot data in an auto-tiering setup with SSDs and rust in the other tiers.

Loved it to bits. No matter what we threw at it, the network was always our bottleneck.