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David Alves commented on CASSANDRA-1337: ---------------------------------------- Any suggestions wrt to unit testing this? > parallelize fetching rows for low-cardinality indexes > ----------------------------------------------------- > > Key: CASSANDRA-1337 > URL: https://issues.apache.org/jira/browse/CASSANDRA-1337 > Project: Cassandra > Issue Type: Improvement > Reporter: Jonathan Ellis > Assignee: David Alves > Priority: Minor > Fix For: 1.2 > > Attachments: > 0001-CASSANDRA-1337-scan-concurrently-depending-on-num-rows.txt, > CASSANDRA-1337.patch > > Original Estimate: 8h > Remaining Estimate: 8h > > currently, we read the indexed rows from the first node (in partitioner > order); if that does not have enough matching rows, we read the rows from the > next, and so forth. > we should use the statistics fom CASSANDRA-1155 to query multiple nodes in > parallel, such that we have a high chance of getting enough rows w/o having > to do another round of queries (but, if our estimate is incorrect, we do need > to loop and do more rounds until we have enough data or we have fetched from > each node). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira