ayushtkn commented on a change in pull request #2043:
URL: https://github.com/apache/hive/pull/2043#discussion_r633723018



##########
File path: common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
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@@ -675,6 +675,16 @@ private static void populateLlapDaemonVarsSet(Set<String> 
llapDaemonVarsSetLocal
         + " table or partition level. If hive.exec.parallel \n"
         + "is set to true then max worker threads created for copy can be 
hive.exec.parallel.thread.number(determines \n"
         + "number of copy tasks in parallel) * hive.repl.parallel.copy.tasks 
"),
+    
REPL_SNAPSHOT_DIFF_FOR_EXTERNAL_TABLE_COPY("hive.repl.externaltable.snapshotdiff.copy",
+        false,"Use snapshot diff for copying data from source to "
+        + "destination cluster for external table in distcp. If true it uses 
snapshot based distcp for all the paths "
+        + "configured as part of hive.repl.external.warehouse.single.copy.task 
along with the external warehouse "
+        + "default location."),
+    
REPL_SNAPSHOT_OVERWRITE_TARGET_FOR_EXTERNAL_TABLE_COPY("hive.repl.externaltable.snapshot.overwrite.target",

Review comment:
       It is being handled as part of the new config,
   ```
   
REPL_EXTERNAL_WAREHOUSE_SINGLE_COPY_TASK_PATHS("hive.repl.external.warehouse.single.copy.task.paths",
   ```




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