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https://issues.apache.org/jira/browse/HADOOP-3486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602088#action_12602088
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sanjay.radia edited comment on HADOOP-3486 at 6/3/08 3:19 PM:
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I had set the default for common mid sized cluster (100-400 nodes).
Looks like we should really do HADOOP-2444 which automates the backoff
parameter.
I guess the argument is that the person running the one node cluster needs to
right default value and that only one running a larger cluster is smart enough
to configure the
appropriate delay parameter.
Jira description and patch has been updated to set the default to 0.
was (Author: sanjay.radia):
Good case to make it shorter; do you literally mean 0 sec or something
short like 5sec?
I had set the default for common mid sized cluster (100-400 nodes).
Looks like we should really do HADOOP-2444 which automates the backoff
parameter.
I guess the argument is that the person running the one node cluster needs to
right default value and that only one running a larger cluster is smart enough
to configure the
appropriate delay parameter.
> Change default for initial block report to 0 sec and document it in
> hadoop-defaults.xml
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-3486
> URL: https://issues.apache.org/jira/browse/HADOOP-3486
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.18.0
>
> Attachments: hadoopDefaults4Delay.patch, hadoopDefaults4Delay2.patch
>
>
> HADOOP-2326 added a new config parameter for the initial block report that
> gets sent after DataNode registration.
> The default value for this parameter was 60 sec.
> This Jira changes the default to 0 sec - the approriate default for 1 node
> or small clusters (say less than 50 nodes)
> This Jira also documents the config parameter in hadoop-defaults.xml
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