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From "Eric Evans (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-4120) Gossip identifies hosts by UUID
Date Fri, 27 Apr 2012 16:58:59 GMT


Eric Evans commented on CASSANDRA-4120:

bq. Throw them away, I would say, since we've done this before when upgrading majors.

OK, and
should cover that (patch output reflects these changes as well).

bq. No. After the big removetoken rewrite, you couldn't removetoken in a mixed 0.8.2/0.8.3
cluster, so this isn't a big deal, as long as we document it in NEWS.

> Gossip identifies hosts by UUID
> -------------------------------
>                 Key: CASSANDRA-4120
>                 URL:
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Core
>            Reporter: Sam Overton
>            Assignee: Eric Evans
>              Labels: virtualnodes, vnodes
> Since there is no longer a one-to-one mapping of host to token, a UUID should be used
to identify a host. This impacts:
> * Gossip
> * Hinted Hand-off
> * some JMX operations (eg. assassinateEndpointUnsafe)
> _Edit: Identify host by UUID, not IP_
> _Edit: Added table of patch links._
> h3. Patches
> ||Compare||Raw diff||Description||Last updated||
> |[01-4120|]|[01-4120.diff|]|Get/set
host ID (UUID)|2012-04-26|
> |[02-4120|]|[02-4120.diff|]|Gossip
host ID and maintain cluster mapping|2012-04-26|
> |[03-4120|]|[03-4120.diff|]|Store
hints by host ID|2012-04-26|
> |[04-4120|]|[04-4120.diff|]|Refactor
{{SS.removeToken}} to use ID instead of Token|2012-04-26|
> ----
> _Note: These are branches managed with TopGit. If you are applying the patch output manually,
you will either need to filter the TopGit metadata files (i.e. {{wget -O - <url> | filterdiff
-x*.topdeps -x*.topmsg | patch -p1}}), or remove them afterward ({{rm .topmsg .topdeps}})._

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