Steve Hoffman created HDFS-3647:
-----------------------------------
Summary: Expose dfs.datanode.max.xcievers as metric
Key: HDFS-3647
URL: https://issues.apache.org/jira/browse/HDFS-3647
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node, performance
Affects Versions: 0.20.2
Reporter: Steve Hoffman
Not sure if this is in a newer version of Hadoop, but in CDH3u3 it isn't there.
There is a lot of mystery surrounding how large to set
dfs.datanode.max.xcievers. Most people say to just up it to 4096, but given
that exceeding this will cause an HBase RegionServer shutdown (see Lars' blog
post here (http://www.larsgeorge.com/2012/03/hadoop-hbase-and-xceivers.html),
it would be nice if we could expose the current count via the built-in metrics
framework (most likely under dfs). In this way we could watch it to see if we
have it set too high, too low, time to bump it up, etc.
Thoughts?
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
