sunchao commented on a change in pull request #1869: HADOOP-16898. Batch 
listing of multiple directories to be an unstable interface
URL: https://github.com/apache/hadoop/pull/1869#discussion_r388002819
 
 

 ##########
 File path: 
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonPathCapabilities.java
 ##########
 @@ -123,4 +125,10 @@ private CommonPathCapabilities() {
    */
   public static final String FS_XATTRS = "fs.capability.paths.xattrs";
 
+  /**
+   * Experimental support for {@link BatchListingOperations}.
+   */
+  @InterfaceStability.Unstable
+  public static final String FS_EXPERIMENTAL_BATCH_LISTING =
+      "fs.capability.experimental.batch.listing";
 
 Review comment:
   If you are OK, I'm inclined towards the final name - have seen enough 
clients in the past that use string value as opposed to the variable name in 
various places and a switch may just make things silently stop working.

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