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https://issues.apache.org/jira/browse/CASSANDRA-1485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908223#action_12908223
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Jeremy Hanna commented on CASSANDRA-1485:
-----------------------------------------

We'll probably just stick with a simple weighted round robin for an initial 
weighted scheduler.  It will assume that all requests are equal and give 
weights to users' request based on configuration settings.

As more is learned, we can implement more sophisticated schedulers that might 
take into account call type (read vs write, types of reads) as far as how long 
we assume the operation to take.  We could just have defined values for each 
type of call and do a deficit calculation based on that for each queue.

> Add a weighted request scheduler
> --------------------------------
>
>                 Key: CASSANDRA-1485
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1485
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jeremy Hanna
>            Assignee: Jeremy Hanna
>            Priority: Minor
>
> Now that CASSANDRA-1035 has given Cassandra a request scheduler interface, it 
> would be nice to have a weighted request scheduler.

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