[KUDU-1286] Set default replication to 3

• Type: Task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Target Version/s: 0.7.0
• Code Review: http://gerrit.cloudera.org:8080/#/c/1959/
• Assignee: Jean-Daniel Cryans
• Reporter: Casey Ching
• Created: 04/Jan/16 22:15
• Updated: 30/Jan/16 02:21
• Resolved: 30/Jan/16 02:21

Description

This is for tracking purposes. There is already a TODO in the code about changing the default replication factor to 3. The default is 1 and isn't recommended for production use.

DEFINE_int32(default_num_replicas, 1, // TODO switch to 3 and fix SelectReplicas()
             "Default number of replicas for tables that do have the num_replicas set.");

https://github.com/cloudera/kudu/blob/master/src/kudu/master/catalog_manager.cc#L105

   * Sets the number of replicas that each tablet will have. If not specified, it defaults to 1
   * replica which isn't safe for production usage.

https://github.com/cloudera/kudu/blob/master/java/kudu-client/src/main/java/org/kududb/client/CreateTableOptions.java#L112

There may be other places that need updates.