[jira] [Commented] (HBASE-14479) Apply the Leader/Followers pattern to RpcServer's Reader

["Hiroshi Ikeda (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14992886#comment-14992886 ] 

Hiroshi Ikeda commented on HBASE-14479:
---------------------------------------

I didn't realize that a wrapped data by SASL might create a several tasks. When we do a task within a received thread, we would make followers process the rest of the tasks.

> Apply the Leader/Followers pattern to RpcServer's Reader
> --------------------------------------------------------
>
>                 Key: HBASE-14479
>                 URL: https://issues.apache.org/jira/browse/HBASE-14479
>             Project: HBase
>          Issue Type: Improvement
>          Components: IPC/RPC, Performance
>            Reporter: Hiroshi Ikeda
>            Assignee: Hiroshi Ikeda
>            Priority: Minor
>         Attachments: HBASE-14479-V2 (1).patch, HBASE-14479-V2.patch, HBASE-14479-V2.patch, HBASE-14479.patch, flamegraph-19152.svg, flamegraph-32667.svg, gc.png, gets.png, io.png, median.png
>
>
> {{RpcServer}} uses multiple selectors to read data for load distribution, but the distribution is just done by round-robin. It is uncertain, especially for long run, whether load is equally divided and resources are used without being wasted.
> Moreover, multiple selectors may cause excessive context switches which give priority to low latency (while we just add the requests to queues), and it is possible to reduce throughput of the whole server.



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