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From "Ari Rabkin (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3585) Hardware Failure Monitoring in large clusters running Hadoop/HDFS
Date Wed, 09 Jul 2008 15:37:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612153#action_12612153
] 

Ari Rabkin commented on HADOOP-3585:
------------------------------------

Rick:    Chukwa opted to go for the separate-process design for reasons along the lines you
lay out.  I haven't studied the failmon code very closely, but it looks like most of what
it does could be done pretty easily from a separate process. 

Runping:  My sense is that having the failmon data collection code wrapped in a Chukwa adaptor
is more convenient, since it avoids the complications of failmon log rotation, and the like.
Also, failmon was written with a fairly similar programming model, so the work involved in
merging the two efforts should be quite modest.

> Hardware Failure Monitoring in large clusters running Hadoop/HDFS
> -----------------------------------------------------------------
>
>                 Key: HADOOP-3585
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3585
>             Project: Hadoop Core
>          Issue Type: New Feature
>         Environment: Linux
>            Reporter: Ioannis Koltsidas
>            Priority: Minor
>         Attachments: FailMon-standalone.zip, failmon.pdf, FailMon_Package_descrip.html,
HADOOP-3585.patch
>
>   Original Estimate: 480h
>  Remaining Estimate: 480h
>
> At IBM we're interested in identifying hardware failures on large clusters running Hadoop/HDFS.
We are working on a framework that will enable nodes to identify failures on their hardware
using the Hadoop log, the system log and various OS hardware diagnosing utilities. The implementation
details are not very clear, but you can see a draft of our design in the attached document.
We are pretty interested in Hadoop and system logs from failed machines, so if you are in
possession of such, you are very welcome to contribute them; they would be of great value
for hardware failure diagnosing.
> Some details about our design can be found in the attached document failmon.doc. More
details will follow in a later post.

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