Yulian Oifa created ZOOKEEPER-4463:
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Summary: Improve the data protocol
Key: ZOOKEEPER-4463
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4463
Project: ZooKeeper
Issue Type: Improvement
Components: java client, jute, server
Affects Versions: 3.6.4
Reporter: Yulian Oifa
There are many operations that require multiple requests being sent to
server.Not only it decreases perfomance , but also it may cause race condition,
when data is being changed between several operations.
For example : when user wants to store the data it should first either check if
item exists and based on the result set and create the record ( another option
is to try either set or create first and if it fails try to second command )
Even more problematic op is delete. In case the node has many children, the
application should remotely collect those nodes and then delete them. Same for
getting children data.
Therefore , in order to improve the perfomance following operations may be very
valuable
1) createOrSet - in some case the goal is to store the value , and its prior
state is not important
2) recursiveDelete - this operation actually exists in CLI but does not exists
for remote commands
3) getChildrenData - return all nodes children together with their data.
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