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  1. ZooKeeper
  2. ZOOKEEPER-699

GSoC 2010: Optimizations for WAN Deployments

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

      Optimizations for WAN Deployments

      Possible Mentor
      Henry Robinson (henry at apache dot org)

      Requirements
      Java, some networking familiarity

      Description
      ZK 3.3.0 added observers which are non-voting members of a ZK ensemble. One use case for observers is as a proxy to a remote voting ensemble, say in a different data center. Since observers do not need to vote, there are less strict latency requirements on the delivery of messages to them. WAN traffic is also expensive. This project would investigate and implement batching of messages to observers, and potential mechanisms for decreasing the number of messages that need to be sent. For example, a destructive update to a znode twice in a row does not theoretically need to be sent twice - although making this work correctly with ZAB will be a challenge.

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            • Assignee:
              Unassigned
              Reporter:
              henryr Henry Robinson
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              • Created:
                Updated: