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From Matthieu Morel <>
Subject Re: run s4 application in 4 machines' cluster
Date Wed, 29 May 2013 14:32:48 GMT

On May 29, 2013, at 03:50 , baojian Zhou wrote:

> hi all, i want to run the benchmark in 4 physical machines in a cluster. These 4 physical
machines had installed zookeeper. But i have a problem that confuse me a lot. As we all know,
before we run the s4 application we have to start the zk Server first. this is my confuse:
> Do i need to start all zk Server in these 4 machines,or just to start a zk Server in
one of them ? just like this:
> ./s4 zkServer -clean -clusters=c=testCluster1:flp=12000:nbTasks=$NB_INJECTORS,c=testCluster2:flp=13000:nbTasks=$NB_NODES

ZooKeeper is used to configure/coordinate S4 nodes, in particular it is used for the assignment
of partitions. Therefore you have to share a ZooKeeper ensemble (or a single instance for
testing) across nodes, by referring to the ZooKeeper server(s) when starting S4 nodes.


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