Tim, one other thing you might want to be aware of: http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin.html#sc_supervision
Patrick On Thu, Oct 28, 2010 at 9:11 AM, Patrick Hunt <ph...@apache.org> wrote: > On Thu, Oct 28, 2010 at 2:52 AM, Tim Robertson > <timrobertson...@gmail.com> wrote: >> We are setting up a small Hadoop 13 node cluster running 1 HDFS >> master, 9 region severs for HBase and 3 map reduce nodes, and are just >> installing zookeeper to perform the HBase coordination and to manage a >> few simple process locks for other tasks we run. >> >> Could someone please advise what kind on heap we should give to our >> single ZK node and also (ahem) how does one actually set this? It's >> not immediately obvious in the docs or config. > > The amount of heap necessary will be dependent on the application(s) > using ZK, also configuration of the heap is dependent on what > packaging you are using to start ZK. > > Are you using zkServer.sh from our distribution? If so then you > probably want to set JVMFLAGS env variable. We pass this through to > the jvm, see -Xmx in the man page > (http://www.manpagez.com/man/1/java/) > > Given this is Hbase (which I'm reasonably familiar with) the default > heap should be fine. However you might want to check with the Hbase > team on that. > > I'd also encourage you to enter a JIRA on the (lack of) doc issue you > highlighted: https://issues.apache.org/jira/browse/ZOOKEEPER > > Regards, > > Patrick >
