[ https://issues.apache.org/jira/browse/CASSANDRA-1337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-1337: -------------------------------------- Fix Version/s: (was: 1.2.1) 2.0 > 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: 2.0 > > Attachments: 1137-bugfix.patch, 1337.patch, 1337-v4.patch, > ASF.LICENSE.NOT.GRANTED--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 For more information on JIRA, see: http://www.atlassian.com/software/jira