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https://issues.apache.org/jira/browse/HADOOP-3022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595672#action_12595672
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Cagdas Gerede commented on HADOOP-3022:
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How do you measure only processing time? Did you have to change the source code
to add logging lines for these measurements or did you use the code as it is?
The datanode records the time in log after it prepares and finishes sending the
block report and the namenode reports after it leaves the safemode. I am trying
to get similar benchmarks. Could you please clarify how you were able to only
measure the processing time?
> Fast Cluster Restart
> --------------------
>
> Key: HADOOP-3022
> URL: https://issues.apache.org/jira/browse/HADOOP-3022
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Robert Chansler
> Assignee: Konstantin Shvachko
> Fix For: 0.18.0
>
>
> This item introduces a discussion of how to reduce the time necessary to
> start a large cluster from tens of minutes to a handful of minutes.
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