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Posted to commits@cassandra.apache.org by "Marcus Olsson (JIRA)" <ji...@apache.org> on 2015/12/01 16:54:11 UTC
[jira] [Updated] (CASSANDRA-9474) Validate dc information on
startup
[ https://issues.apache.org/jira/browse/CASSANDRA-9474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marcus Olsson updated CASSANDRA-9474:
-------------------------------------
Attachment: CASSANDRA-9474-3.0-1.patch
CASSANDRA-9474-2.2-1.patch
[~pauloricardomg] Attaching patches for 2.2 and 3+, the 3.0 patch should apply cleanly upwards. :)
> Validate dc information on startup
> ----------------------------------
>
> Key: CASSANDRA-9474
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9474
> Project: Cassandra
> Issue Type: Improvement
> Environment: Cassandra 2.1.5
> Reporter: Marcus Olsson
> Assignee: Marcus Olsson
> Fix For: 3.1, 3.2, 2.1.x, 2.2.x, 3.0.x
>
> Attachments: CASSANDRA-9474-2.2-1.patch, CASSANDRA-9474-2.2.patch, CASSANDRA-9474-3.0-1.patch, CASSANDRA-9474-dtest.patch, CASSANDRA-9474-trunk.patch, cassandra-2.1-9474.patch, cassandra-2.1-dc_rack_healthcheck.patch
>
>
> When using GossipingPropertyFileSnitch it is possible to change the data center and rack of a live node by changing the cassandra-rackdc.properties file. Should this really be possible? In the documentation at http://docs.datastax.com/en/cassandra/2.1/cassandra/initialize/initializeMultipleDS.html it's stated that you should ??Choose the name carefully; renaming a data center is not possible??, but with this functionality it doesn't seem impossible(maybe a bit hard with changing replication etc.).
> This functionality was introduced by CASSANDRA-5897 so I'm guessing there is some use case for this?
> Personally I would want the DC/rack settings to be as restricted as the cluster name, otherwise if a node could just join another data center without removing it's local information couldn't it mess up the token ranges? And suddenly the old data center/rack would loose 1 replica of all the data that the node contains.
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