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From "Chao Shi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8801) Region level read/write degradation
Date Tue, 09 Jul 2013 04:09:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13702873#comment-13702873

Chao Shi commented on HBASE-8801:

Hi Bing,

Thanks for sharing your thoughts on this. Throttling TPS/throughput is another interesting
area to work on. Agree with you that META should be too heavy to save our little blacklist.
Maybe ZK would be a nice choice. I'm also working on a pluggable RpcScheduler (HBASE-8884),
hopefully we can simply implement a customized scheduler, which loads configruation from ZK
and perform banning and throttling.
> Region level read/write degradation
> -----------------------------------
>                 Key: HBASE-8801
>                 URL: https://issues.apache.org/jira/browse/HBASE-8801
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Chao Shi
> We would like to propose a tool for HBase administrators to disable read and/or write
for single region temporarily.
> Our HBase table at weibo.com is accessed by many clients. We have experienced the following
outage: due to bugs of user code, a small number of regions are reading at very high rate.
Requests to other regions at the same RSs are affected. In such scenario, the admin would
like to temporarily set the region to write-only (only forbids reads so writes can still being

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