[ https://issues.apache.org/jira/browse/CASSANDRA-7252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14100092#comment-14100092 ]
Aleksey Yeschenko commented on CASSANDRA-7252: ---------------------------------------------- bq. Do you want me to create another ticket for the address option? If you feel like it and still need it - go for it. (This doesn't mean I'm for it - I haven't looked into the need for it, myself). > RingCache cannot be configured to use local DC only > --------------------------------------------------- > > Key: CASSANDRA-7252 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7252 > Project: Cassandra > Issue Type: Bug > Components: Hadoop > Reporter: Robbie Strickland > Assignee: Robbie Strickland > Labels: patch > Fix For: 2.0.10, 2.1.1 > > Attachments: cassandra-2.0.7-7252-2.txt, cassandra-2.0.7-7252.txt > > > RingCache always calls describe_ring, returning the entire cluster. > Considering it's used in the context of writing from Hadoop (which is > typically in a multi-DC configuration), this is often not desirable behavior. > In some cases there may be high-latency connections between the analytics DC > and other DCs. > I am attaching a patch that adds an optional config value to tell RingCache > to use local nodes only, in which case it calls describe_local_ring instead. > It also adds helpful failed host information to IOExceptions thrown in > AbstractColumnFamilyOutputFormat.createAuthenticatedClient, CqlRecordWriter, > and ColumnFamilyRecordWriter. This allows a user to more easily solve > related connectivity issues. -- This message was sent by Atlassian JIRA (v6.2#6252)