hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "huaxiang sun (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-17215) Separate small/large file delete threads in HFileCleaner to accelerate hfile cleanup speed
Date Tue, 28 Mar 2017 20:26:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15945887#comment-15945887
] 

huaxiang sun edited comment on HBASE-17215 at 3/28/17 8:25 PM:
---------------------------------------------------------------

Hi [~carp84], we are seeing a case that cleaner is not fast enough to free up the disk space.
Thought this jira can help in speeding up disk space clean. Do you mind post the patch? Thanks!


was (Author: huaxiang):
Hi [~carp84], we are seeing a case that cleaner is fast enough to free up the disk space.
Thought this jira can help in speeding up disk space clean. Do you mind post the patch? Thanks!

> Separate small/large file delete threads in HFileCleaner to accelerate hfile cleanup
speed
> ------------------------------------------------------------------------------------------
>
>                 Key: HBASE-17215
>                 URL: https://issues.apache.org/jira/browse/HBASE-17215
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Yu Li
>            Assignee: Yu Li
>
> When using PCIe-SSD the flush speed will be really quick, and although we have per CF
flush, we still have the {{hbase.regionserver.optionalcacheflushinterval}} setting and some
other mechanism to avoid data kept in memory for too long to flush small hfiles. In our online
environment we found the single thread cleaner kept cleaning earlier flushed small files while
large files got no chance, which caused disk full then many other problems.
> Deleting hfiles in parallel with too many threads will also increase the workload of
namenode, so here we propose to separate large/small hfile cleaner threads just like we do
for compaction, and it turned out to work well in our cluster.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message