code: public void populate() throws Exception {
          for (int i = 0, cnt = _partition.getIdCount(); i < cnt; i++) {
              int memberId = _partition.getIdStart() + i;
              _partition.set(memberId, createDataForMember(memberId), System.nanoTime());
          }
          _partition.sync();
      }
docs: Populates the underlying data partition.
  
  @throws Exception