[
https://issues.apache.org/jira/browse/CASSANDRA-8918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis resolved CASSANDRA-8918.
---------------------------------------
Resolution: Later
Fix Version/s: (was: 3.0)
All right. Resolving as Later.
> Optimise compaction performance for unique partition keys
> ---------------------------------------------------------
>
> Key: CASSANDRA-8918
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8918
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
>
> Related to the raft of improvements we're looking at for improving the CPU
> burden of merge, if we can demonstrate that an entire partition key is unique
> to a given file (which is quite easily done) we can avoid materialising any
> of the row, and simply copy the data wholesale, with potentially some small
> modifications to the index file data if it has clustering column index
> entries, and special treatment of tombstones (most simple would be to only
> check there are no tombstones to purge, and abort this approach if so).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
