private OplogSet getOplogSet(DiskRegionView drv) {
    if (drv.isBackup()) {
      return getPersistentOplogs();
    } else {
      return overflowOplogs;
    }
  }
Initializes the contents of any regions on this DiskStore that have been registered but are not
yet initialized.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java