Details

    • Type: Wish
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:

      Description

      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.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                dorserg Sergey Doroshenko
                Reporter:
                henryr Henry Robinson
              • Votes:
                0 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated: