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https://issues.apache.org/jira/browse/HADOOP-3022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594390#action_12594390
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Cagdas Gerede commented on HADOOP-3022:
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What is the replica count in this benchmark?
I am guessing it is 3 (6 million / 500 nodes =12,000 objects / per node. 36000
/ 12000 = 3 replicas).
Could you clarify?
What does "process block reports" include? Does it include the time for
generation of block reports in datanode and the time for namenode to receive
the block reports? Or is it only the time to process all block reports not
including receiving time?
I was wondering how the numbers would be affected if you had the same number of
objects but 1000 datanodes instead of 500 datanodes and 250 datanodes instead
of 500 datanodes.
Do you have any guess?
> 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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