From 09451252fae90a3ec192b8d7f0c49508df65e8c5 Mon Sep 17 00:00:00 2001 From: Andrew Wang Date: Tue, 29 Nov 2016 00:12:35 -0800 Subject: [PATCH] HDFS-5517. Lower the default maximum number of blocks per file. Contributed by Aaron T. Myers. --- .../src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java | 2 +- .../hadoop-hdfs/src/main/resources/hdfs-default.xml | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java index d7d3c9dd6ba..df218579aa1 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java +++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java @@ -399,7 +399,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys { public static final String DFS_NAMENODE_MIN_BLOCK_SIZE_KEY = "dfs.namenode.fs-limits.min-block-size"; public static final long DFS_NAMENODE_MIN_BLOCK_SIZE_DEFAULT = 1024*1024; public static final String DFS_NAMENODE_MAX_BLOCKS_PER_FILE_KEY = "dfs.namenode.fs-limits.max-blocks-per-file"; - public static final long DFS_NAMENODE_MAX_BLOCKS_PER_FILE_DEFAULT = 1024*1024; + public static final long DFS_NAMENODE_MAX_BLOCKS_PER_FILE_DEFAULT = 10*1000; public static final String DFS_NAMENODE_MAX_XATTRS_PER_INODE_KEY = "dfs.namenode.fs-limits.max-xattrs-per-inode"; public static final int DFS_NAMENODE_MAX_XATTRS_PER_INODE_DEFAULT = 32; public static final String DFS_NAMENODE_MAX_XATTR_SIZE_KEY = "dfs.namenode.fs-limits.max-xattr-size"; diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml index c9d74bb9cfc..9fce84f7107 100644 --- a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml +++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml @@ -372,7 +372,7 @@ dfs.namenode.fs-limits.max-blocks-per-file - 1048576 + 10000 Maximum number of blocks per file, enforced by the Namenode on write. This prevents the creation of extremely large files which can degrade performance.