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Zookeeper >> mail # user >> Zookeeper performance


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Baskar Duraikannu 2013-07-31, 11:16
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Camille Fournier 2013-07-31, 11:49
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Baskar Duraikannu 2013-07-31, 22:51
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Henry Robinson 2013-07-31, 23:05
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Ted Dunning 2013-07-31, 23:14
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Re: Zookeeper performance
On Wed, Jul 31, 2013 at 4:16 AM, Baskar Duraikannu
<[EMAIL PROTECTED]> wrote:
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> We are looking to use zookeeper for optimistic concurrency. Basically when the user saves data on a screen, we need to lock,  read to ensure that no one else has changed the row while user is editing data, persist data and unlock znode.
>

Why not use the built in optimistic locking that ZK provides? See the
"version" parameter here:
http://zookeeper.apache.org/doc/r3.4.5/api/org/apache/zookeeper/ZooKeeper.html#getData(java.lang.String,
boolean, org.apache.zookeeper.AsyncCallback.DataCallback,
java.lang.Object)
http://zookeeper.apache.org/doc/r3.4.5/api/org/apache/zookeeper/ZooKeeper.html#setData(java.lang.String,
byte[], int, org.apache.zookeeper.AsyncCallback.StatCallback,
java.lang.Object)

> If the app/thread does not get a lock, we may set a watch so that polling is avoided.
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> Our application is write intensive certain times of the day. We may get about 100k requests per second.  Can zookeeper handle this volume?

Unlikely you'll see this level of performance:
http://zookeeper.apache.org/doc/r3.4.5/zookeeperOver.html#Performance

Patrick
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Baskar Duraikannu 2013-07-31, 22:48
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Bill de hÓra 2013-07-31, 19:09
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Baskar Duraikannu 2013-07-31, 22:25
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Baskar Duraikannu 2013-07-31, 23:57