[ https://issues.apache.org/jira/browse/CASSANDRA-13988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
C. Scott Andreas updated CASSANDRA-13988: ----------------------------------------- Component/s: CQL > Add a timeout field to EXECUTE / QUERY / BATCH messages > ------------------------------------------------------- > > Key: CASSANDRA-13988 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13988 > Project: Cassandra > Issue Type: Improvement > Components: CQL > Reporter: Michaël Figuière > Priority: Minor > > The request timeout at the coordinator level is currently statically > configured through the {{request_timeout_in_ms}} and > {{xxx_request_timeout_in_ms}} parameters in cassandra.yaml. There would be > some benefits in making it possible for the client to dynamically define it > through the CQL Protocol: > * In practice, there's often a misalignment between the timeout configured in > Cassandra and in the client leading non-optimal query execution flow, where > the coordinator continues to work while the client is not waiting anymore, or > where the client waits for too long for a potential response. The 99th > percentile latency can be significantly impacted by such issues. > * While the read timeout is typically statically configured on the Drivers, > on the Java Driver 3.x the developer is free to set a custom timeout using > {{ResultSetFuture#get(long, TimeUnit)}} which can lead to an extra > misalignment of timeouts with the coordinator. The Java Driver 4.x will make > the timeout configurable per query through its new {{DriverConfigProfile}} > abstraction. > * It makes it possible for applications to shift to a "remaining time budget" > approach rather than the often inappropriate static timeout one. Also, the > Java Driver 4.x plans to change its definition of {{readTimeout}} from a per > execution attempt time to an overall query execution time. So the Driver > itself would also be able to work on a "remaining time budget" for each of > its execution attempts. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org