From a732acd8730277df4d9b97b97101bc2bc768800f Mon Sep 17 00:00:00 2001 From: Aaron Fabbri Date: Fri, 4 May 2018 16:37:47 -0700 Subject: [PATCH] HDFS-5926 Documentation should clarify dfs.datanode.du.reserved impact from reserved disk capacity (Gabor Bota) --- .../hadoop-hdfs/src/main/resources/hdfs-default.xml | 3 +++ 1 file changed, 3 insertions(+) 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 c64b2f159f..7a437abcfa 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 @@ -349,6 +349,9 @@ For example, reserved space for RAM_DISK storage can be configured using property 'dfs.datanode.du.reserved.ram_disk'. If specific storage type reservation is not configured then dfs.datanode.du.reserved will be used. + Note: In case of using tune2fs to set reserved-blocks-percentage, or other filesystem tools, + then you can possibly run into out of disk errors because hadoop will not check those + external tool configurations.