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https://issues.apache.org/jira/browse/CASSANDRA-8457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965767#comment-15965767
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Jason Brown commented on CASSANDRA-8457:
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bq. you seem to have squashed everything ...

Yes, that's correct, as it makes rebasing a more manageable task with these 
longer-lived projects. However, I always make a backup of a branch before 
squashing and rebasing, and here's the last one: 
[8457_pre-2017Mar16-rebase|https://github.com/jasobrown/cassandra/tree/8457_pre-2017Mar16-rebase].
 It has everything the squashed version does except for the commit to fix ssl 
hostname verification (sha {{5ccdd50624ef166eb46ea559aca3c4b264d8b124}}).

I'll address your other comments ASAP

> nio MessagingService
> --------------------
>
>                 Key: CASSANDRA-8457
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8457
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Jonathan Ellis
>            Assignee: Jason Brown
>            Priority: Minor
>              Labels: netty, performance
>             Fix For: 4.x
>
>
> Thread-per-peer (actually two each incoming and outbound) is a big 
> contributor to context switching, especially for larger clusters.  Let's look 
> at switching to nio, possibly via Netty.



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