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Posted to commits@cassandra.apache.org by "Brandon Williams (JIRA)" <ji...@apache.org> on 2012/08/17 22:40:38 UTC
[jira] [Updated] (CASSANDRA-4383) Binary encoding of vnode tokens
[ https://issues.apache.org/jira/browse/CASSANDRA-4383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Brandon Williams updated CASSANDRA-4383:
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Attachment: 0001-Add-HOST_ID-and-TOKENS-app-states-binary-serialization.txt
Patch to promote hostId and tokens to their own app states. I decided to suppress tokens in the gossipinfo output, and likewise left hostIds as strings, since the savings from encoding those in binary is not much and maintaining a list of things we do need to convert back to a human readable format will get tedious. Having a huge list of tokens in gossipinfo is actually a bit counterproductive for troubleshooting gossip issues anyway, and the information is available elsewhere.
What's left now is about a zillion tests to rewrite (again) to support the new states.
> Binary encoding of vnode tokens
> -------------------------------
>
> Key: CASSANDRA-4383
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4383
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: Brandon Williams
> Assignee: Brandon Williams
> Fix For: 1.2.0
>
> Attachments: 0001-Add-HOST_ID-and-TOKENS-app-states-binary-serialization.txt, 4383-v1.txt
>
>
> Since after CASSANDRA-4317 we can know which version a remote node is using (that is, whether it is vnode-aware or not) this a good opportunity to change the token encoding to binary, since with a default of 256 tokens per node even a fixed-length 16 byte encoding per token provides a great deal of savings in gossip traffic over a text representation.
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