@Override
      public Thread newThread(Runnable r) {
        final String name = archiverName + "-" + threadNumber.getAndIncrement();
        Thread t = new Thread(r, name);
        t.setDaemon(true);
        return t;
      }
Archive the specified regions in parallel.
@param conf          the configuration to use
@param fs            {@link FileSystem} from which to remove the region
@param rootDir       {@link Path} to the root directory where hbase files are stored (for
                     building the archive path)
@param tableDir      {@link Path} to where the table is being stored (for building the archive
                     path)
@param regionDirList {@link Path} to where regions are being stored (for building the archive
                     path)
@throws IOException if the request cannot be completed
hbase-server/src/main/java/org/apache/hadoop/hbase/backup/HFileArchiver.java