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HDFS-5346. Avoid unnecessary call to getNumLiveDataNodes() for each block during IBR processing. Contributed by Ravi Prakash. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532915 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Kihwal Lee 2013-10-16 21:14:28 +00:00
parent dea1b2e84a
commit a0fc90ea92
2 changed files with 4 additions and 1 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -3674,6 +3674,9 @@ Release 0.23.10 - UNRELEASED
HDFS-5010. Reduce the frequency of getCurrentUser() calls from namenode
(kihwal)
HDFS-5346. Avoid unnecessary call to getNumLiveDataNodes() for each block
during IBR processing (Ravi Prakash via kihwal)
OPTIMIZATIONS
BUG FIXES

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -4618,7 +4618,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
*/
private boolean needEnter() {
return (threshold != 0 && blockSafe < blockThreshold) ||
(getNumLiveDataNodes() < datanodeThreshold) ||
(datanodeThreshold != 0 && getNumLiveDataNodes() < datanodeThreshold) ||
(!nameNodeHasResourcesAvailable());
}