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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 ]
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
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Key: HADOOP-3486
URL:
https://issues.apache.org/jira/browse/HADOOP-3486Project: 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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