leesf commented on code in PR #4441:
URL: https://github.com/apache/hudi/pull/4441#discussion_r856885202


##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/BulkInsertPartitioner.java:
##########
@@ -38,4 +44,25 @@
    * @return {@code true} if the records within a partition are sorted; {@code 
false} otherwise.
    */
   boolean arePartitionRecordsSorted();
+
+  /**
+   * Return file group id prefix for the given data partition.
+   * By defauult, return a new file group id prefix, so that incoming records 
will route to a fresh new file group
+   * @param partitionId data partition
+   * @return
+   */
+  default String getFileIdPfx(int partitionId) {
+    return FSUtils.createNewFileIdPfx();
+  }
+
+  /**
+   * Return write handle factory for the given partition.
+   * By default, return CreateHandleFactory which will always write to a new 
file group

Review Comment:
   The description is not correct since it returns empty?



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