@Override
  protected AdminResponse createResponse(DistributionManager dm) {
    flushToDiskFactory.createFlushToDisk(dm.getCache()).run();
    return flushToDiskFactory.createResponse(getSender());
  }
A request to from an admin VM to all non admin members to start a backup. In the prepare phase of
the backup, the members will suspend bucket destroys to make sure buckets aren't missed during
the backup.
geode-core/src/main/java/org/apache/geode/internal/cache/backup/FlushToDiskRequest.java