cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Apache Wiki <wikidi...@apache.org>
Subject [Cassandra Wiki] Update of "FAQ" by JonHermes
Date Fri, 17 Sep 2010 00:00:12 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "FAQ" page has been changed by JonHermes.
http://wiki.apache.org/cassandra/FAQ?action=diff&rev1=83&rev2=84

--------------------------------------------------

  Yes, but it will require restarting and running repair manually to change the replica count
of existing data.
  
   * Alter the ReplicationFactor for the desired keyspace(s) in the storage configuration
on each node in the cluster.
-  * Restart cassandra on each node in the cluster
+  * Restart cassandra on each node in the cluster.
  
  If you're reducing the ReplicationFactor:
  
-  * Run "nodetool cleanup" on the cluster to remove surplus replicated data.
+  * Run "nodetool cleanup" on the cluster to remove surplus replicated data. Cleanup runs
on a per-node basis.
  
  If you're increasing the ReplicationFactor:
  
-  * Run "nodetool repair" to run an anti-entropy repair on the cluster. This is an intensive
process so may result in adverse cluster performance.
+  * Run "nodetool repair" to run an anti-entropy repair on the cluster. Repair runs on a
per-node basis. This is an intensive process that will result in adverse cluster performance.
It's highly recommended to do rolling repairs, as an attempt to repair the entire cluster
at once will most likely swamp it and may even kill it.
  
  <<Anchor(large_file_and_blob_storage)>>
  

Mime
View raw message