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Hudson commented on HDFS-8865: ------------------------------ SUCCESS: Integrated in Hadoop-Yarn-trunk-Java8 #322 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/322/]) HDFS-8865. Improve quota initialization performance. Contributed by Kihwal Lee. (kihwal: rev b6ceee9bf42eec15891f60a014bbfa47e03f563c) * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestDiskspaceQuotaUpdate.java * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImageWithSnapshot.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java * hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt * hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/QuotaCounts.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/BackupImage.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java > Improve quota initialization performance > ---------------------------------------- > > Key: HDFS-8865 > URL: https://issues.apache.org/jira/browse/HDFS-8865 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Kihwal Lee > Assignee: Kihwal Lee > Fix For: 3.0.0, 2.8.0 > > Attachments: HDFS-8865.patch, HDFS-8865.v2.checkstyle.patch, > HDFS-8865.v2.patch, HDFS-8865.v3.patch > > > After replaying edits, the whole file system tree is recursively scanned in > order to initialize the quota. For big name space, this can take a very long > time. Since this is done during namenode failover, it also affects failover > latency. > By using the Fork-Join framework, I was able to greatly reduce the > initialization time. The following is the test result using the fsimage from > one of the big name nodes we have. > || threads || seconds|| > | 1 (existing) | 55| > | 1 (fork-join) | 68 | > | 4 | 16 | > | 8 | 8 | > | 12 | 6 | > | 16 | 5 | > | 20 | 4 | -- This message was sent by Atlassian JIRA (v6.3.4#6332)