You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Heng Chen (JIRA)" <ji...@apache.org> on 2016/08/03 07:56:20 UTC
[jira] [Commented] (HBASE-16025) Cache table state to reduce load
on META
[ https://issues.apache.org/jira/browse/HBASE-16025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405529#comment-15405529 ]
Heng Chen commented on HBASE-16025:
-----------------------------------
Yeah, it is a problem. For one request, i think we could cache the state after get the state firstly from meta during retry. wdyt?
> Cache table state to reduce load on META
> ----------------------------------------
>
> Key: HBASE-16025
> URL: https://issues.apache.org/jira/browse/HBASE-16025
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Reporter: Gary Helmling
> Assignee: Gary Helmling
> Priority: Critical
> Fix For: 2.0.0
>
>
> HBASE-12035 moved keeping table enabled/disabled state from ZooKeeper into hbase:meta. When we retry operations on the client, we check table state in order to return a specific message if the table is disabled. This means that in master we will be going back to meta for every retry, even if a region's location has not changed. This is going to cause performance issues when a cluster is already loaded, ie. in cases where regionservers may be returning CallQueueTooBigException.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)