void clearRegion(DiskRegion dr, RegionVersionVector<DiskStoreID> rvv) {
    lock(true);
    try {
      ifTotalRecordCount++;
      if (dr.getClearRVV() == null) {
        ifLiveRecordCount++;
      } else {
        // we now have one record to gc (the previous clear).
      }
      dr.setClearRVV(rvv);
      writeClearRecord(dr, rvv);
    } finally {
      unlock(true);
    }

  }
Clear the region using an RVV.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskInitFile.java