FAQ
[ https://issues.apache.org/jira/browse/HBASE-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-69 stopped by Jim Kellerman.
[hbase] Make cache flush triggering less simplistic
---------------------------------------------------

Key: HBASE-69
URL: https://issues.apache.org/jira/browse/HBASE-69
Project: Hadoop HBase
Issue Type: Improvement
Components: regionserver
Reporter: stack
Assignee: Jim Kellerman
Fix For: 0.2.0

Attachments: patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt, patch.txt


When flusher runs -- its triggered when the sum of all Stores in a Region > a configurable max size -- we flush all Stores though a Store memcache might have but a few bytes.
I would think Stores should only dump their memcache disk if they have some substance.
The problem becomes more acute, the more families you have in a Region.
Possible behaviors would be to dump the biggest Store only, or only those Stores > 50% of max memcache size. Behavior would vary dependent on the prompt that provoked the flush. Would also log why the flush is running: optional or > max size.
This issue comes out of HADOOP-2621.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

Search Discussions

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
groupdev @
categorieshbase, hadoop
postedFeb 22, '08 at 5:12p
activeFeb 22, '08 at 5:12p
posts1
users1
websitehbase.apache.org

1 user in discussion

Jim Kellerman (JIRA): 1 post

People

Translate

site design / logo © 2022 Grokbase