let path be binary
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Key: ZOOKEEPER-1024
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1024
Project: ZooKeeper
Issue Type: New Feature
Components: server
Reporter: jiangwen wei
let path be binary, not string. there are overhead to hold string.
the overhead is obvious when there are millions of nodes.
some time ZK can be used as a highly available meta database.
some data are binary, if converting to string, there is also obvious overhead.
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