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https://issues.apache.org/jira/browse/ZOOKEEPER-699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henry Robinson updated ZOOKEEPER-699:
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Summary: GSoC 2010: Optimizations for WAN Deployments (was: Optimizations
for WAN Deployments)
> GSoC 2010: Optimizations for WAN Deployments
> --------------------------------------------
>
> Key: ZOOKEEPER-699
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-699
> Project: Zookeeper
> Issue Type: Wish
> Reporter: Henry Robinson
>
> 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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