Fangmin Lv created ZOOKEEPER-3473:
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Summary: Improving successful TLS handshake throughput with
concurrent control
Key: ZOOKEEPER-3473
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3473
Project: ZooKeeper
Issue Type: Improvement
Components: server
Reporter: Fangmin Lv
Assignee: Fangmin Lv
Fix For: 3.6.0
When there are lots of clients trying to re-establish sessions, there might be
lots of half finished handshake timed out, and those failed ones keep
reconnecting to another server and restarting the handshake from beginning
again, which caused herd effect.
And the number of total ZK sessions could be supported within session timeout
are impacted a lot after enabling TLS.
To improve the throughput, we added the TLS concurrent control to reduce the
herd effect, and from out benchmark this doubled the sessions we could support
within session timeout.
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