Vijay created CASSANDRA-4705: -------------------------------- Summary: Speculative execution for CL_ONE Key: CASSANDRA-4705 URL: https://issues.apache.org/jira/browse/CASSANDRA-4705 Project: Cassandra Issue Type: Bug Affects Versions: 1.2.0 Reporter: Vijay Assignee: Vijay Priority: Minor
When read_repair is not 1.0, we send the request to one node for some of the requests. When a node goes down or when a node is too busy the client has to wait for the timeout before it can retry. It would be nice to watch for latency and execute an additional request to a different node, if the response is not received within average/99% of the response times recorded in the past. CASSANDRA-2540 might be able to solve the variance when read_repair is set to 1.0 1) May be we need to use metrics-core to record various Percentiles 2) Modify ReadCallback.get to execute additional request speculatively. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira