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From "Matteo Bertozzi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12977) normalize handlerCount to keep handlers distributed evenly among callQueues
Date Thu, 05 Feb 2015 11:30:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14307077#comment-14307077
] 

Matteo Bertozzi commented on HBASE-12977:
-----------------------------------------

{quote}let's say handlerCount =10 ,handler factor=0.4 which produce numCallQueues to 4, so
we distribute 10 handlers to 4 callQueues.
with this patch we'll normalize handlerCount to 12.{quote}
that's not what the patch is doing

handlerCount = 10
callQueuesHandlersFactor = 0.4
numCallQueues = handlerCount * callQueuesHandlersFactor
handlerPerQueue = 1 / callQueuesHandlersFactor
handlerCount = numCallQueues * handlerPerQueue
handlerCount is 10 and not 12

> normalize  handlerCount to keep handlers distributed evenly among callQueues
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-12977
>                 URL: https://issues.apache.org/jira/browse/HBASE-12977
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: hongyu bi
>            Assignee: hongyu bi
>            Priority: Minor
>         Attachments: HBASE-12977-v0.patch
>
>
> If enable multi callQueues , handlers may not be distributed evenly among multi queues,
which mean the queue's capacity is not the same. Should we make handler's distribution even?




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