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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "FAQ" by JonathanEllis
Date Tue, 02 Feb 2010 22:42:33 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 JonathanEllis.
The comment on this change is: add "ports".


  = Frequently asked questions =
   * [[#cant_listen_on_ip_any|Why can't I make Cassandra listen on (all my addresses)?]]
+  * [[#ports|What ports does Cassandra use?]]
   * [[#slows_down_after_lotso_inserts|Why does Cassandra slow down after doing a lot of inserts?]]
   * [[#existing_data_when_adding_new_nodes|What happens to existing data in my cluster when
I add new nodes?]]
   * [[#modify_cf_config|Can I add/remove/rename Column Families on a working cluster?]]
@@ -21, +22 @@

  If you don't want to manually specify an IP to !ListenAddress for each node in your cluster
(understandable!), leave it blank and Cassandra will use !InetAddress.getLocalHost() to pick
an address.  Then it's up to you or your ops team to make things resolve correctly (/etc/hosts/,
dns, etc).
  See [[|CASSANDRA-256]] and [[|CASSANDRA-43]]
for more gory details.
+ <<Anchor(ports)>>
+ == What ports does Cassandra use? ==
+ By default, Cassandra uses 7000 and 7001 for cluster communication, 9160 for clients (Thrift),
8888 for java remote debugging, and 8080 for JMX.
  == Why does Cassandra slow down after doing a lot of inserts? ==

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