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https://issues.apache.org/jira/browse/PHOENIX-1674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14350033#comment-14350033
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James Taylor commented on PHOENIX-1674:
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[~lhofhansl] - any questions from your end? I seem to remember you wondering if 
three transaction managers can run (1 active, 2 stand-bys). 

Can these be co-located with RSs (and does that make sense)? Would it be 
possible to communicate to them via an EndPoint coprocessor and even run in the 
same JVM as the RS?

> Snapshot isolation transaction support through Tephra
> -----------------------------------------------------
>
>                 Key: PHOENIX-1674
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1674
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: James Taylor
>
> Tephra (http://tephra.io/ and https://github.com/caskdata/tephra) is one 
> option for getting transaction support in Phoenix. Let's use this JIRA to 
> discuss the way in which this could be integrated along with the pros and 
> cons.



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