@Test
  public void testPersistOverflowASyncWithoutBuffer9() {
    try {
      // Create four Dirs for Disk Dirs
      File file1 = new File("testPersistOverflowASyncWithoutBuffer9Dir1");
      file1.mkdir();
      file1.deleteOnExit();
      File file2 = new File("testPersistOverflowASyncWithoutBuffer9Dir2");
      file2.mkdir();
      file2.deleteOnExit();
      File file3 = new File("testPersistOverflowASyncWithoutBuffer9Dir3");
      file3.mkdir();
      file3.deleteOnExit();
      File file4 = new File("testPersistOverflowASyncWithoutBuffer9Dir4");
      file4.mkdir();
      file4.deleteOnExit();
      dirs = new File[4];
      dirs[0] = file1;
      dirs[1] = file2;
      dirs[2] = file3;
      dirs[3] = file4;

      diskProps.setTimeInterval(15000l);
      diskProps.setBytesThreshold(0l);
      diskProps.setOverFlowCapacity(1000);
      region = DiskRegionHelperFactory.getAsyncOverFlowAndPersistRegion(cache, diskProps);
    } catch (Exception e) {
      e.printStackTrace();
      fail("failed in testPersistOverflowASyncWithoutBuffer9");
    }
    // Perf test for 1kb writes
    populateData();
    System.out.println(
        "Persist-OverflowASyncWITHOUTBuffer9(with DiskWriteAttributes Time-out of 1 Second):: Stats for 1 kb writes :"
            + stats);
    // Perf test for 1kb writes. Puting values on the same KEY
    // populateDataPutOnSameKey();
    // System.out.println("Persist-OverflowASyncWITHOUTBuffer9:: Stats for 1 kb
    // writes :"+ stats_ForSameKeyputs);
    // Deleting all the files and logs created during the test...
    deleteFiles();
    // closeDown();

  }
Consolidated Disk Region Perftest. Overflow, Persist, OverflowWithPersist modes are tested for
Sync, AsyncWithBuffer and AsyncWithoutBufer writes.
geode-core/src/performanceTest/java/org/apache/geode/internal/cache/diskPerf/DiskRegionPerfJUnitPerformanceTest.java