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https://issues.apache.org/jira/browse/CASSANDRA-19451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bret McGuire updated CASSANDRA-19451:
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Resolution: Won't Fix
Status: Resolved (was: Triage Needed)
> 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
> Priority: High
> Time Spent: 40m
> Remaining Estimate: 0h
>
> 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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