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Merge HDFS-3091. Update the usage limitations of ReplaceDatanodeOnFailure policy in the config description for the smaller clusters. Contributed by Nicholas. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1302633 13f79535-47bb-0310-9956-ffa450edef68
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Uma Maheswara Rao G 2012-03-19 20:12:32 +00:00
parent 84738bcd39
commit 5c7e5fbf91
2 changed files with 9 additions and 0 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -145,6 +145,9 @@ Release 0.23.3 - UNRELEASED
HDFS-3111. Missing license headers in trunk. (umamahesh) HDFS-3111. Missing license headers in trunk. (umamahesh)
HDFS-3091. Update the usage limitations of ReplaceDatanodeOnFailure policy in
the config description for the smaller clusters. (szetszwo via umamahesh)
OPTIMIZATIONS OPTIMIZATIONS
HDFS-2477. Optimize computing the diff between a block report and the HDFS-2477. Optimize computing the diff between a block report and the
namenode state. (Tomasz Nykiel via hairong) namenode state. (Tomasz Nykiel via hairong)

6
hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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@ -371,6 +371,12 @@
This is a site-wide property to enable/disable the feature. This is a site-wide property to enable/disable the feature.
When the cluster size is extremely small, e.g. 3 nodes or less, cluster
administrators may want to set the policy to NEVER in the default
configuration file or disable this feature. Otherwise, users may
experience an unusually high rate of pipeline failures since it is
impossible to find new datanodes for replacement.
See also dfs.client.block.write.replace-datanode-on-failure.policy See also dfs.client.block.write.replace-datanode-on-failure.policy
</description> </description>
</property> </property>