Added new nodes to cluster but no streams

[Batranut Bogdan]

Hello,
I have added new nodes to the existing cluster. In Opscenter I do not see any 
streams... I presume that the new nodes get the data from the rest of the 
cluster via streams. The existing cluster has TB magnitude, and space used in 
the new nodes is ~90 GB. I must admit that I have restarted the new nodes 
several times after adding them . Does this affect boostrap? AFAIK the new 
nodes should start loading a part of all the data in the existing cluster.
Is this normal?