Talk:Distributed shared memory

how about numa, and the Altix? it does fall in shared memory category doesn't it?!

NUMA is not DSM

NUMA and DSM are distinct. With NUMA a node can access memory elsewhere albeit less quickly than local memory. With DSM a node cannot directly access memory elsewhere. To access another node's memory it must engage the other node's cooperation (e.g., via messages). To ensure that all nodes have a coherent view of memory, now that's where things get interesting ...