[Cassandra Wiki] Update of "Operations" by RobertColi

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The "Operations" page has been changed by RobertColi.
http://wiki.apache.org/cassandra/Operations?action=diff&rev1=56&rev2=57

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  == Moving or Removing nodes ==
  === Removing nodes entirely ===
- You can take a node out of the cluster with `nodetool decommission` to a live node, or `nodetool removetoken` (to any other machine) to remove a dead one.  This will assign the ranges the old node was responsible for to other nodes, and replicate the appropriate data there.
+ You can take a node out of the cluster with `nodetool decommission` to a live node, or `nodetool removetoken` (to any other machine) to remove a dead one.  This will assign the ranges the old node was responsible for to other nodes, and replicate the appropriate data there. If `decommission` is used, the data will stream from the decommissioned node. If `removetoken` is used, the data will stream from the remaining replicas.
  
  No data is removed automatically from the node being decommissioned, so if you want to put the node back into service at a different token on the ring, it should be removed manually.