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From "Brandon Williams (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1654) EC2Snitch
Date Mon, 03 Jan 2011 21:09:47 GMT


Brandon Williams updated CASSANDRA-1654:

    Attachment: 1654-v4.txt

v4 fixes the NPE caused by the node asking the snitch for its own dc/rack info, which of course
is not in gossip.

> EC2Snitch
> ---------
>                 Key: CASSANDRA-1654
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Brandon Williams
>             Fix For: 0.7.1
>         Attachments: 1654-cassandra-0.7-v3.txt, 1654-incomplete.txt, 1654-v2.txt, 1654-v4.txt,
> This will be a snitch extending AbstractNetworkTopologySnitch that pulls DC from instance
metadata placement_availability_zone.
> I don't think we can get rack information so the choice is between picking something
unique-per-machine to be the rack or assigning everything in the DC the same rack.  Second
seems easier, so let's use placement_availability_zone for rack, too.

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