Jane He created CASSANDRA-19451:
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Summary: An Option of Latency Sensitive Load Balancing Policy
Key: CASSANDRA-19451
URL: https://issues.apache.org/jira/browse/CASSANDRA-19451
Project: Cassandra
Issue Type: Improvement
Components: Client/java-driver
Reporter: Jane He
Assignee: Jane He
We have received concerns from the community about the 4.x java driver default
load balancing policy's performance in terms of busy node avoidance. In some
circumstances, when some nodes are busy, the 3.x java driver's
`LatencyAwarenessLoadBalancingPolicy` almost does not send requests to the busy
nodes, while the 4.x default one will still send a lot of requests to them.
This is because the 4.x default one uses in-flight count and responses in the
past 200ms to determine a node's health instead of latency.
Therefore, we want to create another class called
`LatencySensitiveLoadBalancingPolicy` in the 4.x java driver, which will
combine the in-flight count and the latency. A user can use it by specifying it
in `application.conf`.
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