[ https://issues.apache.org/jira/browse/CASSANDRA-4137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Thibaut updated CASSANDRA-4137: ------------------------------- Priority: Major (was: Critical) > QUORUM Multiget RangeSliceQuery causes unnecessary writes to read entries > ------------------------------------------------------------------------- > > Key: CASSANDRA-4137 > URL: https://issues.apache.org/jira/browse/CASSANDRA-4137 > Project: Cassandra > Issue Type: Bug > Components: Core > Affects Versions: 0.8.9 > Reporter: Thibaut > > From the mailing list: > I created a new test keyspace and added 10 000 keys to it. The cluster has 3 > machines, RF=3, read repair disabled (enabling it didn't change anything). > The keyspace doesn't contain any thumbstones. No keys were deleted. > When I fetch a rangeslice through hector and set the consistency level to > quorum, according to cfstats (and also to the output files on the hd), > cassandra seems to execute a write request for each read I execute. The write > count in cfstats is increased when I execute the rangeslice function over the > same range again and again (without saving anything at all). > If I set the consistency level to ONE or ALL, no writes are executed. > I checked the writes on one machine. They increased by 2300 for each > iteration over the 10000 keys. I didn't check, but this probably corresponds > to the number of keys for which the machine is responsible. > Code: > Keyspace ks = getConnection(cluster, > consistencylevel); > RangeSlicesQuery<String, String, V> > rangeSlicesQuery = HFactory.createRangeSlicesQuery(ks, > StringSerializer.get(), StringSerializer.get(), s); > rangeSlicesQuery.setColumnFamily(columnFamily); > rangeSlicesQuery.setColumnNames(column); > rangeSlicesQuery.setKeys(start, end); > rangeSlicesQuery.setRowCount(maxrows); > QueryResult<OrderedRows<String, String, V>> > result = rangeSlicesQuery.execute(); > return result.get(); -- 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