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From Inder Pall <inder.p...@gmail.com>
Subject Re: Use cases for ZooKeeper
Date Thu, 05 Jan 2012 05:15:19 GMT

i am trying to use the lock recipe for leader election and can share my
findings/sample code in sometime.
Regarding your query of orphaned locks  - these are sequential ephemeral
znodes which are automatically removed from ZK
once the session breaks i believe.

On Thu, Jan 5, 2012 at 9:39 AM, Josh Stone <pacesysjosh@gmail.com> wrote:

> I have a few use cases that I'm wondering if ZooKeeper would be suitable
> for and would appreciate some feedback.
> First use case: Distributing work to a cluster of nodes using consistent
> hashing to ensure that messages of some type are consistently handled by
> the same node. I haven't been able to find any info about ZooKeeper +
> consistent hashing. Is anyone using it for this? A concern here would be
> how to redistribute work as nodes come and go from the cluster.
> Second use case: Distributed locking. I noticed that there's a recipe for
> this on the ZooKeeper wiki. Is anyone doing this? Any issues? One concern
> would be how to handle orphaned locks if a node that obtained a lock goes
> down.
> Third use case: Fault tolerance. If we utilized ZooKeeper to distribute
> messages to workers, can it be made to handle a node going down by
> re-distributing the work to another node (perhaps messages that are not
> ack'ed within a timeout are resent)?
> Cheers,
> Josh

- Inder
  Tech Platforms @Inmobi
  Linkedin - http://goo.gl/eR4Ub

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