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From Ned Wolpert <ned.wolp...@imemories.com>
Subject Question about node failure...
Date Mon, 29 Mar 2010 17:27:45 GMT
Folks-

Can someone point out what happens during a node failure. Here is the
Specific usecase:

  - Cassandra cluster with 4 nodes, replication factor of 3
  - One node fails.
  - At this point, data that existed on the one failed node has copies on 2
live nodes.
  - The failed node never comes back

First question: At what point does Cassandra re-migrate that data that only
exists on 2 nodes to another node to retain the replication factor of 3?

Second question: Given the above case, if a brand new node is added to the
cluster, does anything happen to the data that now only exists on 2 nodes?

Thanks.

-- 
Virtually, Ned Wolpert

"Settle thy studies, Faustus, and begin..."   --Marlowe

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