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https://issues.apache.org/jira/browse/CASSANDRA-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862427#action_12862427
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Jonathan Ellis commented on CASSANDRA-1035:
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so you would have some fairly large number of SP instances, say 1000, and app X
would get 800, and app Y and Z would get 100 each, to tune QOS? That seems
reasonable.
> Implement User/Keyspace throughput Scheduler
> --------------------------------------------
>
> Key: CASSANDRA-1035
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1035
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Stu Hood
>
> To support multiple applications on top of a single Cassandra cluster (and to
> protect against badly behaving clients) having a very simple scheduler for
> MUTATION-STAGE and READ-STAGE would be very beneficial.
> Since all tasks are short lived, a sufficient scheduler would probably only
> need to manage the queue of incoming requests, and weight them based on an
> assigned ID. The ID could be dynamically determined by using ip, userid or
> keyspace for instance, and then each Runnable would be assigned an ID.
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