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From "Eran Chinthaka Withana (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4791) When a node bootstrap in a multi-datacenter environment it should try to get data only from local nodes
Date Wed, 10 Oct 2012 23:27:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473691#comment-13473691
] 

Eran Chinthaka Withana commented on CASSANDRA-4791:
---------------------------------------------------

[~jbellis], from my experience I have seen the bootstrapping node reading from the nodes from
a different data centers which are about 80ms away. And I don't think those nodes should be
considered "closest". The snitch, which I believe comes from cassandra-topology.properties
contains correct information about the topology of the cluster. 

I looked at CASSANDRA-2434 also and it says "even if you don't care about the consistency
issues, I don't think there is currently a way to bootstrap from local nodes only." but not
sure whether this got implemented in Cassandra 1.0.x versions. 
                
> When a node bootstrap in a multi-datacenter environment it should try to get data only
from local nodes
> -------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4791
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4791
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Eran Chinthaka Withana
>
> When a node bootstraps, in a multi-datacenter environment, currently it is streaming
data from any node available. But, to cut down the intra datacenter traffic, it should first
try to stream data within the same datacenter or there should be a flag to explicitly limit
it to stream data from its own data center.

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