[ https://issues.apache.org/jira/browse/CASSANDRA-4886?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-4886: -------------------------------------- Affects Version/s: (was: 1.1.6) Fix Version/s: (was: 1.1.6) 2.0 > Remote ColumnFamilyInputFormat > ------------------------------ > > Key: CASSANDRA-4886 > URL: https://issues.apache.org/jira/browse/CASSANDRA-4886 > Project: Cassandra > Issue Type: Improvement > Components: Hadoop > Reporter: Scott Fines > Fix For: 2.0 > > Attachments: CASSANDRA-4886.patch > > > As written, the ColumnFamilyInputFormat does not have a great deal of fault > tolerance. > It only attempts to perform a read from a single replica, with an infinite > timeout. If that replica is not available, then the Task fails, and must be > retried on a different node. > This is fine if the TaskTrackers are colocated with Cassandra nodes, but is > very fragile when this is not possible. When the Tasktrackers are remote to > cassandra, the same rules about clients should apply--there should be a > strict (configurable) timeout, and the ability to retry requests on a > different replica if at single request fails. > It seems obvious that we'd want to support both types of architecture; to do > that, we should probably have a configuration which allows the user to > specify his architecture choices explicitely. -- 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