@After
 public void tearDown() {
   log.info("clean tool and cluster while tearDown!");
   clean_tool(local);
   reset_cluster(csList, dsList);
   batch_uncomment(csList, tair_bin + groupconf, dsList, "#");
 }
 @Before
 public void setUp() {
   log.info("clean tool and cluster while setUp!");
   clean_tool(local);
   reset_cluster(csList, dsList);
   batch_uncomment(csList, tair_bin + groupconf, dsList, "#");
   if (!batch_modify(csList, tair_bin + groupconf, copycount, "2"))
     fail("modify configure file failure");
   if (!batch_modify(dsList, tair_bin + groupconf, copycount, "2"))
     fail("modify configure file failure");
 }