private void cmnBeginPartialDestroyRegion(DiskRegionView dr) {
    // count the begin as both live and total
    ifLiveRecordCount++;
    ifTotalRecordCount++;

    dr.markBeginDestroyDataStorage();
  }
Maximum number of bytes used to encode a DiskRegion id.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskInitFile.java