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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1035) Implement User/Keyspace throughput Scheduler
Date Thu, 29 Apr 2010 21:38:53 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862428#action_12862428
] 

Jonathan Ellis commented on CASSANDRA-1035:
-------------------------------------------

of course that assumes each app is doing the same amount of work per SP call, which is dubious
in the presence of mutliget + batch_mutate.

> 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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