hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14479) Apply the Leader/Followers pattern to RpcServer's Reader
Date Tue, 20 Oct 2015 23:03:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965933#comment-14965933
] 

stack commented on HBASE-14479:
-------------------------------

bq.  In this jira issue, the benefit is not from this main advantage because we just add the
requests to queues.

Yeah, in a new issue, should we pull out the queue... Or, rather, I suppose in a follow-on
I could experiment with removing queues to see if it buys us throughput. If it does, then
we could look into redoing scheduling so it was like the 'Bound handle/thread association'
from the paper.

Thanks for looking at the WAL [~ikeda] I have a sense that this pattern might help with the
multiple-syncing threads... but let me try.

> 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, 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message