From 0da49642fc1eb71997b1aa268583c1ba09a16687 Mon Sep 17 00:00:00 2001
From: Yiqun Lin <yqlin@apache.org>
Date: Mon, 10 Sep 2018 13:57:36 +0800
Subject: [PATCH] HDFS-13884. Improve the description of the setting
 dfs.image.compress. Contributed by Ryan Wu.

---
 .../hadoop-hdfs/src/main/resources/hdfs-default.xml         | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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 5f115ec081f..1573582c91a 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
@@ -1284,7 +1284,11 @@
 <property>
   <name>dfs.image.compress</name>
   <value>false</value>
-  <description>Should the dfs image be compressed?
+  <description>When this value is true, the dfs image will be compressed.
+    Enabling this will be very helpful if dfs image is large since it can
+    avoid consuming a lot of network bandwidth when SBN uploads a new dfs
+    image to ANN. The compressed codec is specified by the setting
+    dfs.image.compression.codec.
   </description>
 </property>