[jira] [Commented] (CASSANDRA-9766) Faster Streaming

["T Jake Luciani (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-9766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270910#comment-15270910 ] 

T Jake Luciani commented on CASSANDRA-9766:
-------------------------------------------

I've made those changes, squashed and restarted tests. I'll commit assuming a clean CI.

The final streaming improvement is 25%

> Faster Streaming
> ----------------
>
>                 Key: CASSANDRA-9766
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9766
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Streaming and Messaging
>         Environment: Cassandra 2.1.2. more details in the pdf attached 
>            Reporter: Alexei K
>            Assignee: T Jake Luciani
>              Labels: performance
>             Fix For: 3.x
>
>         Attachments: problem.pdf
>
>
> I have a cluster in Amazon cloud , its described in detail in the attachment. What I've noticed is that we during bootstrap we never go above 12MB/sec transmission speeds and also those speeds flat line almost like we're hitting some sort of a limit ( this remains true for other tests that I've ran) however during the repair we see much higher,variable sending rates. I've provided network charts in the attachment as well . Is there an explanation for this? Is something wrong with my configuration, or is it a possible bug?



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