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Ryan McGuire edited comment on CASSANDRA-6731 at 2/19/14 11:48 PM: ------------------------------------------------------------------- [~thobbs] yep, setting speculative_retry='NONE' dropped the connections to other nodes entirely. FWIW, I haven't seen the performance problem that [~arisp] originally saw (he [reported 50% slowdown here|http://stackoverflow.com/questions/21807422/cassandra-reads-slow-with-multiple-nodes].) SR does seem to usually decrease best-case performance a bit, but drastically increase performance in the worst-case, so I'm happy as it stands. was (Author: enigmacurry): [~thobbs] yep, setting speculative_retry='NONE' dropped the connections to other nodes entirely. FWIW, I haven't seen the performance problem that [~arisp] originally saw. SR does seem to usually decrease best-case performance a bit, but drastically increase performance in the worst-case, so I'm happy as it stands. > Requests unnecessarily redirected with CL=ONE > --------------------------------------------- > > Key: CASSANDRA-6731 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6731 > Project: Cassandra > Issue Type: Bug > Components: Core > Environment: Linux > Reporter: Aris Prassinos > Assignee: Tyler Hobbs > Priority: Minor > Fix For: 2.0.6 > > Attachments: 6731.traces.txt, ticket_6731.py > > > Three-node cluster with RF=3. All data currently in sync. > Network topology strategy. Each node defined to be on a different rack. > endpoint_snitch: PropertyFileSnitch > dynamic_snitch_update_interval_in_ms: 100 > dynamic_snitch_reset_interval_in_ms: 600000 > dynamic_snitch_badness_threshold: 0 > All tables defined with read_repair_chance=0 > From cqlsh when querying with Consistency=ONE tracing shows that requests get > frequently redirected to other nodes even though the local node has the data. > There is no other activity on the cluster besides my test queries. -- This message was sent by Atlassian JIRA (v6.1.5#6160)