siddharthteotia commented on a change in pull request #6926:
URL: https://github.com/apache/incubator-pinot/pull/6926#discussion_r633824307



##########
File path: 
pinot-controller/src/main/java/org/apache/pinot/controller/recommender/realtime/provisioning/MemoryEstimator.java
##########
@@ -127,26 +124,21 @@ public MemoryEstimator(TableConfig tableConfig, File 
sampleCompletedSegment, int
       
_invertedIndexColumns.addAll(_tableConfig.getIndexingConfig().getInvertedIndexColumns());
     }
     _avgMultiValues = getAvgMultiValues();
-
-    _tableDataDir = new File(TMP_DIR, _tableNameWithType);
-    try {
-      FileUtils.deleteDirectory(_tableDataDir);
-    } catch (IOException e) {
-      throw new RuntimeException("Exception in deleting directory " + 
_tableDataDir.getAbsolutePath(), e);
-    }
-    _tableDataDir.mkdir();
+    _workingDir = workingDir;
   }
 
   /**
    * Constructor used for processing the given data characteristics (instead 
of completed segment)
    */
   public MemoryEstimator(TableConfig tableConfig, Schema schema, 
SchemaWithMetaData schemaWithMetadata,
-      int numberOfRows, int ingestionRatePerPartition, long 
maxUsableHostMemory, int tableRetentionHours) {
+      int numberOfRows, int ingestionRatePerPartition, long 
maxUsableHostMemory, int tableRetentionHours,
+      File workingDir) {

Review comment:
       (nit) please add brief javadoc on how this workingDir is used




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