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https://issues.apache.org/jira/browse/HADOOP-3694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12611411#action_12611411
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Bill de hOra commented on HADOOP-3694:
--------------------------------------
Looks like these calls in the MiniDFS ctor
{code}
235 UnixUserGroupInformation information = UnixUserGroupInformation.login( conf
);
262 NameNode.format(conf);
272 nameNode = NameNode.createNameNode(args, conf);
{code}
2008-07-08 00:29:40,034 INFO fs.FSNamesystem
(FSNamesystem.java:initialize(286)) - Finished loading FSImage in 12461 msecs
suggests maybe FSNamesystem is where to start optimising?
> if MiniDFS startup time could be improved, testing time would be reduced
> ------------------------------------------------------------------------
>
> Key: HADOOP-3694
> URL: https://issues.apache.org/jira/browse/HADOOP-3694
> Project: Hadoop Core
> Issue Type: Improvement
> Components: test
> Affects Versions: 0.19.0
> Reporter: Steve Loughran
>
> Its taking me 140 minutes to run a test build; looking into the test results
> its the 20s startup delay of every MiniDFS cluster that is slowing things
> down. If we could find out why it is taking so long and cut it down, every
> test case that relied on a cluster would be speeded up.
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