[jira] [Commented] (CASSANDRA-3590) Use multiple connection to share the OutboutTCPConnection

["Vijay (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-3590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13187471#comment-13187471 ] 

Vijay commented on CASSANDRA-3590:
----------------------------------

My Conclusion of the test is, Multiple connections makes sense only while talking over Multiple DC's... Within a AWS Region/DC the latencies/Delays aren't that much and is not noticeable... but it definitely is noticeable in the Multi-DC setup.
                
> Use multiple connection to share the OutboutTCPConnection
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-3590
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3590
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>             Fix For: 1.2
>
>         Attachments: TCPTest.xlsx, TCPTest.zip
>
>
> Currently there is one connection between any given host to another host in the cluster, the problem with this is:
> 1) This can become a bottleneck in some cases where the latencies are higher.
> 2) When a connection is dropped we also drop the queue and recreate a new one and hence the messages can be lost (Currently hints will take care of it and clients also can retry)
> by making it a configurable option to configure the number of connections and also making the queue common to those connections the above 2 issues can be resolved.

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