Changing CFS replication factor

(4 posts) (2 voices)

• Started 2 years ago by matt
• Latest reply from tjake
• This topic is resolved

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1. 

   matt
   Member

   I noticed in the code for CassandraFileSystemStore.java that it tries to read cfs.replication from the system properties. What is the correct way to set this in a settings file? Should this go into $BRISK_HOME/resources/hadoop/conf/core-site.xml? Or is there a cassandra config file where this should get set. I'd like to boot up the cluster with CFS replication set to 3.

   Posted 2 years ago #
2. 

   tjake
   Moderator

   Hi Matt,

   The beta1 packages don't include this hook yet (we will add to initial startup config in beta2) but for now you can change this using the cassandra-cli

   update keyspace cfs with strategy_options=[{replication_factor:3}];

   Posted 2 years ago #
3. 

   matt
   Member

   If I set this as a system property (ie: -Dcfs.replication=3 at JVM invocation) in one of the startup scripts then it should get picked up right?

   Thus far, I haven't started the task-trackers on my cluster, so the CFS keyspace hasn't been created yet.

   Posted 2 years ago #
4. 

   tjake
   Moderator

   Ah ok, then you can start it manually like so:

   brisk cassandra -t -Dcfs.replication=3

   Posted 2 years ago #

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