2014-05-15 09:08:01,803 [myid:5] - WARN [SyncThread:5:FileTxnLog@321] - fsync-ing the write ahead log in SyncThread:5 took 15154ms which will adversely effect operation latency. See the ZooKeeper troubleshooting guide
TODO
-solution A:decrease high io
-solution B:decrease nodes registered to zk so also indirectly decrease edits written to WAL
-C :check GC
-D move zk ensemble to io-light nodes