Hi Jon, 
  We do not have any limit on the number of znodes in Zookeeper. Its mainly
limited by memory, since it keeps the whole namespace in memory.

Also the lock mechanism is a good use case for zookeeper.
It is listed as one of the recipes for zookeeper.



On 12/29/08 5:54 PM, "Jon Stefansson" <jonstef1...@gmail.com> wrote:

> I am considering using ZooKeeper as a Lock mechanism in an application that
> eventually could produce several hundred thousand znodes per day. The znodes
> will contain little or no data. There will just be a lot of them.
> I don't see anything in the ZooKeeper documentation regarding znode size
> constraints. Is this a good use case for ZooKeeper?

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