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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "GangliaMetrics" by BrianBockelman
Date Sat, 04 Oct 2008 18:29:31 GMT
Dear Wiki user,

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The following page has been changed by BrianBockelman:

- Create a file called hadoop-metrics.properties, and stick it in your hadoop config directory.
+ Edit the file hadoop-metrics.properties, if it is not already present in your config directory.
- The file should look like this:
+ The file should contain at least the following lines:
- dfs.servers=@GMETAD@:8650
+ dfs.servers=@GANGLIA@:8649
- mapred.servers=@GMETAD@:8650
+ mapred.servers=@GANGLIA@:8649
+ jvm.class=org.apache.hadoop.metrics.ganglia.GangliaContext
+ jvm.period=10
+ jvm.servers=@GANGLIA@:8649
- I made hadoop talk directly to gmetad.  I found that if I have hadoop talk to gmond at localhost,
then hadoop metrics get reported from, rather than from the more useful host name
used to communicate with gmetad.
+ Replace @GANGLIA@ with the hostname or IP of the ganglia endpoint.  Depending on your Ganglia
configuration, the host or IP you use might be:
+   * The value in the udp_send_channel you use in your /etc/gmond.conf (look for the line
which says mcast_join=<IP ADDRESS>).
+   * The gmetad server
+   * Localhost
+ Be aware that versions 0.18.1 and prior need to be patched in order to get Ganglia working;
refer to [https://issues.apache.org/jira/browse/HADOOP-3422 JIRA issue 3422].

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