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From "Stu Hood (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1035) Implement User/Keyspace throughput Scheduler
Date Thu, 01 Jul 2010 18:17:50 GMT


Stu Hood updated CASSANDRA-1035:

    Attachment:     (was: 0005-Minimize-queue-creation-and-remove-redundant-schedul.patch)

> Implement User/Keyspace throughput Scheduler
> --------------------------------------------
>                 Key: CASSANDRA-1035
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Stu Hood
>            Assignee: Nirmal Ranganathan
>             Fix For: 0.7
>         Attachments: 0001-Adding-the-RequestScheduler-abstraction-and-a-simple.patch,
0002-Thrift-related-changes-for-RequestScheduler-added-a-.patch, 0003-Avro-related-changes-for-RequestScheduler.patch,
0004-Test-case-for-RoundRobinScheduler.patch, 0005-Add-options-for-throttling.patch
> To support multiple applications on top of a single Cassandra cluster (and to protect
against badly behaving clients) having a very simple scheduler for client operations 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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