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https://issues.apache.org/jira/browse/CASSANDRA-7839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432984#comment-16432984
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Joseph Lynch commented on CASSANDRA-7839:
-----------------------------------------

Ah, nice catch. The two dtest failures don't look related and the unit tests 
pass, so lg2m.

> Support standard EC2 naming conventions in Ec2Snitch
> ----------------------------------------------------
>
>                 Key: CASSANDRA-7839
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7839
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Gregory Ramsperger
>            Assignee: Jason Brown
>            Priority: Major
>              Labels: docs-impacting
>         Attachments: CASSANDRA-7839-aws-naming-conventions.patch
>
>
> The EC2 snitches use datacenter and rack naming conventions inconsistent with 
> those presented in Amazon EC2 APIs as region and availability zone. A 
> discussion of this is found in CASSANDRA-4026. This has not been changed for 
> valid backwards compatibility reasons. Using SnitchProperties, it is possible 
> to switch between the legacy naming and the full, AWS-style naming. 
> Proposal:
> * introduce a property (ec2_naming_scheme) to switch naming schemes.
> * default to current/legacy naming scheme
> * add support for a new scheme ("standard") which is consistent AWS 
> conventions
> ** data centers will be the region name, including the number
> ** racks will be the availability zone name, including the region name
> Examples:
> * * legacy* : datacenter is the part of the availability zone name preceding 
> the last "\-" when the zone ends in \-1 and includes the number if not \-1. 
> Rack is the portion of the availability zone name following  the last "\-".
> ** us-west-1a => dc: us-west, rack: 1a
> ** us-west-2b => dc: us-west-2, rack: 2b; 
> * *standard* : datacenter is the part of the availability zone name preceding 
> zone letter. rack is the entire availability zone name.
> ** us-west-1a => dc: us-west-1, rack: us-west-1a
> ** us-west-2b => dc: us-west-2, rack: us-west-2b; 



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