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. Matthieu
