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HDFS-4569. Small image transfer related cleanups. Contributed by Andrew Wang. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1454233 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2013-03-08 03:37:21 +00:00
parent 06f27d8731
commit 4909821aa9
4 changed files with 23 additions and 5 deletions
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4
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -25,7 +25,6 @@ Trunk (Unreleased)
HADOOP-8562. Enhancements to support Hadoop on Windows Server and Windows
Azure environments. (See breakdown of tasks below for subtasks and
contributors)
IMPROVEMENTS
@ -341,6 +340,9 @@ Release 2.0.5-beta - UNRELEASED
HDFS-4519. Support overriding jsvc binary and log file locations
when launching secure datanode. (Chris Nauroth via suresh)
HDFS-4569. Small image transfer related cleanups.
(Andrew Wang via suresh)
OPTIMIZATIONS
BUG FIXES

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
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@ -361,7 +361,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
// Image transfer timeout
public static final String DFS_IMAGE_TRANSFER_TIMEOUT_KEY = "dfs.image.transfer.timeout";
public static final int DFS_IMAGE_TRANSFER_TIMEOUT_DEFAULT = 60 * 1000;
public static final int DFS_IMAGE_TRANSFER_TIMEOUT_DEFAULT = 10 * 60 * 1000;
//Keys with no defaults
public static final String DFS_DATANODE_PLUGINS_KEY = "dfs.datanode.plugins";

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/TransferFsImage.java
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@ -229,7 +229,6 @@ public class TransferFsImage {
SecurityUtil.openSecureHttpConnection(url);
if (timeout <= 0) {
// Set the ping interval as timeout
Configuration conf = new HdfsConfiguration();
timeout = conf.getInt(DFSConfigKeys.DFS_IMAGE_TRANSFER_TIMEOUT_KEY,
DFSConfigKeys.DFS_IMAGE_TRANSFER_TIMEOUT_DEFAULT);

21
hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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@ -733,12 +733,29 @@
</description>
</property>
<property>
<name>dfs.image.transfer.timeout</name>
<value>600000</value>
<description>
Timeout for image transfer in milliseconds. This timeout and the related
dfs.image.transfer.bandwidthPerSec parameter should be configured such
that normal image transfer can complete within the timeout.
This timeout prevents client hangs when the sender fails during
image transfer, which is particularly important during checkpointing.
Note that this timeout applies to the entirety of image transfer, and
is not a socket timeout.
</description>
</property>
<property>
<name>dfs.image.transfer.bandwidthPerSec</name>
<value>0</value>
<description>
Specifies the maximum amount of bandwidth that can be utilized for image
transfer in term of the number of bytes per second.
Maximum bandwidth used for image transfer in bytes per second.
This can help keep normal namenode operations responsive during
checkpointing. The maximum bandwidth and timeout in
dfs.image.transfer.timeout should be set such that normal image
transfers can complete successfully.
A default value of 0 indicates that throttling is disabled.
</description>
</property>