From e66ecc564a747b03b77442516045c2ae0d5a60b3 Mon Sep 17 00:00:00 2001
From: Shashikant Banerjee <shashikant@apache.org>
Date: Thu, 16 May 2019 18:38:52 +0530
Subject: [PATCH] HDDS-1531. Disable the sync flag by default during chunk
 writes in Datanode (#820). Contributed by Shashikant Banerjee.

---
 .../src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java  | 2 +-
 hadoop-hdds/common/src/main/resources/ozone-default.xml         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java b/hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java
index adcd090af6..1463c43e83 100644
--- a/hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java
+++ b/hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java
@@ -56,7 +56,7 @@ public final class OzoneConfigKeys {
 
   public static final String DFS_CONTAINER_CHUNK_WRITE_SYNC_KEY =
       "dfs.container.chunk.write.sync";
-  public static final boolean DFS_CONTAINER_CHUNK_WRITE_SYNC_DEFAULT = true;
+  public static final boolean DFS_CONTAINER_CHUNK_WRITE_SYNC_DEFAULT = false;
   /**
    * Ratis Port where containers listen to.
    */
diff --git a/hadoop-hdds/common/src/main/resources/ozone-default.xml b/hadoop-hdds/common/src/main/resources/ozone-default.xml
index d43020e69a..c8a566a794 100644
--- a/hadoop-hdds/common/src/main/resources/ozone-default.xml
+++ b/hadoop-hdds/common/src/main/resources/ozone-default.xml
@@ -54,7 +54,7 @@
   </property>
   <property>
     <name>dfs.container.chunk.write.sync</name>
-    <value>true</value>
+    <value>false</value>
     <tag>OZONE, CONTAINER, MANAGEMENT</tag>
     <description>Determines whether the chunk writes in the container happen as
       sync I/0 or buffered I/O operation.