In Multichain does every node keep a copy of blocks of unsubscribed streams?

Question

In MultiChain each node decides which streams to subscribe to, and can ignore the data contained by others. Does it mean that every node doesn't keep a copy of blocks of unsubscribed streams?

Answer 1

Every node keeps a copy of the content of unsubscribed streams, it just doesn't index that content in any way for the same of efficient retrieval.