Read-Only Mode -------------- Key: ZOOKEEPER-704 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-704 Project: Zookeeper Issue Type: Wish Reporter: Henry Robinson
Read-only mode Possible Mentor Henry Robinson (henry at apache dot org) Requirements Java and TCP/IP networking Description When a ZooKeeper server loses contact with over half of the other servers in an ensemble ('loses a quorum'), it stops responding to client requests because it cannot guarantee that writes will get processed correctly. For some applications, it would be beneficial if a server still responded to read requests when the quorum is lost, but caused an error condition when a write request was attempted. This project would implement a 'read-only' mode for ZooKeeper servers (maybe only for Observers) that allowed read requests to be served as long as the client can contact a server. This is a great project for getting really hands-on with the internals of ZooKeeper - you must be comfortable with Java and networking otherwise you'll have a hard time coming up to speed. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.