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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-704) Cluster-wide mutex (ZooKeeper integration)
Date Wed, 20 Jan 2010 06:21:58 GMT


Jonathan Ellis commented on CASSANDRA-704:

I would rather see this mutex in contrib, and I don't think CASSANDRA-721 belongs in our repo
at all (CASSANDRA-580 will allow incr in a way that fits Cassandra's design better, as I think
you agree).

> Cluster-wide mutex (ZooKeeper integration)
> ------------------------------------------
>                 Key: CASSANDRA-704
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Jaakko Laine
>            Assignee: Jaakko Laine
>         Attachments: 704-cluster-mutex.patch, zookeeper-3.2.2.jar
> Provide a cluster-wide mutex (zookeeper integration). Not strictly needed at the moment,
but since it's done now, I'll post it here for community to review & decide if it should
be included. This would allow us to have atomic increment/decrement operations before vector
clocks, and might come handy in automatic load balancing and other future tasks.

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