private void snapshotMobRegion(MasterProcedureEnv env) throws IOException {
    if (!MobUtils.hasMobColumns(htd)) {
      return;
    }
    ThreadPoolExecutor exec =
      SnapshotManifest.createExecutor(env.getMasterConfiguration(), "MobRegionSnapshotPool");
    RegionInfo mobRegionInfo = MobUtils.getMobRegionInfo(htd.getTableName());
    try {
      ModifyRegionUtils.editRegions(exec, Collections.singleton(mobRegionInfo),
        new ModifyRegionUtils.RegionEditTask() {
          @Override
          public void editRegion(final RegionInfo region) throws IOException {
            snapshotManifest.addRegion(CommonFSUtils.getTableDir(rootDir, snapshotTable), region);
          }
        });
    } finally {
      exec.shutdown();
    }
    status.setStatus("Completed referencing HFiles for the mob region of table: " + snapshotTable);
  }
A procedure used to take snapshot on tables.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/SnapshotProcedure.java