What is the recommended number of zookeeper server on 11 nodes cluster

[byambajargal]

Hello everybody

I have run  a cluster with 11 nodes hbase CDH3u0 and i have 2 zookeeper 
server in my cluster
It seems very slowly when i run the rowcounter example
my question is what is the recommended number of zookeeper server should 
i run for 11 nodes cluster

cheers


Byambajargal