Example #1
0
 protected void createTable(String tableName) throws Exception {
   HTableDescriptor td = new HTableDescriptor(tableName.getBytes());
   HColumnDescriptor cd = new HColumnDescriptor(TEST_TABLE_CF.getBytes());
   td.addFamily(cd);
   admin.createTable(td);
   LOG.info(tableName + " table is successfully created.");
 }
 /** Test default value handling for memStoreFlushSize */
 @Test
 public void testGetMemStoreFlushSize() {
   HTableDescriptor desc = new HTableDescriptor("table");
   assertEquals(-1, desc.getMemStoreFlushSize());
   desc.setMemStoreFlushSize(1111L);
   assertEquals(1111L, desc.getMemStoreFlushSize());
 }
 @Override
 void perform() throws IOException {
   Admin admin = connection.getAdmin();
   try {
     HTableDescriptor htd = createTableDesc();
     TableName tableName = htd.getTableName();
     if (admin.tableExists(tableName)) {
       return;
     }
     String numRegionKey = String.format(NUM_REGIONS_KEY, this.getClass().getSimpleName());
     numRegions = getConf().getInt(numRegionKey, DEFAULT_NUM_REGIONS);
     byte[] startKey = Bytes.toBytes("row-0000000000");
     byte[] endKey = Bytes.toBytes("row-" + Integer.MAX_VALUE);
     LOG.info("Creating table:" + htd);
     admin.createTable(htd, startKey, endKey, numRegions);
     Assert.assertTrue("Table: " + htd + " was not created", admin.tableExists(tableName));
     HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
     enabledTables.put(tableName, freshTableDesc);
     LOG.info("Created table:" + freshTableDesc);
   } catch (Exception e) {
     LOG.warn("Caught exception in action: " + this.getClass());
     throw e;
   } finally {
     admin.close();
   }
   verifyTables();
 }
  public void createTable(String tableName, List<String> ColumnFamilies) {
    HBaseAdmin admin = null;
    try {
      admin = new HBaseAdmin(conf);
      HTableDescriptor tableDescriptor = new HTableDescriptor(Bytes.toBytes(tableName));

      for (String columnFamily : ColumnFamilies) {
        HColumnDescriptor columnDescriptor = new HColumnDescriptor(columnFamily);
        tableDescriptor.addFamily(columnDescriptor);
      }
      admin.createTable(tableDescriptor);
      admin.close();
    } catch (TableExistsException e) {
      System.out.println("Table already exist:" + tableName);
      try {
        admin.close();
      } catch (IOException e1) {
        System.out.println("Error occurred while cloing the HBaseAdmin conneciton:" + e1);
      }
    } catch (MasterNotRunningException e) {
      throw new RuntimeException("HBase master not running, table creation failed.");
    } catch (ZooKeeperConnectionException e) {
      throw new RuntimeException("Zookeeper not running, table creation failed.");
    } catch (IOException e) {
      throw new RuntimeException("IO error, table creation failed.");
    }
  }
Example #5
0
 public static void CreateTable(HBaseConfiguration conf) throws IOException {
   HBaseAdmin admin = new HBaseAdmin(conf);
   HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("people"));
   tableDescriptor.addFamily(new HColumnDescriptor("personal"));
   tableDescriptor.addFamily(new HColumnDescriptor("contactinfo"));
   tableDescriptor.addFamily(new HColumnDescriptor("creditcard"));
   admin.createTable(tableDescriptor);
 }
 @Override
 public HTableDescriptor createHtd(final String tableName) {
   HTableDescriptor htd = new HTableDescriptor(tableName);
   HColumnDescriptor hcd = new HColumnDescriptor(TEST_FAMILY);
   hcd.setMobEnabled(true);
   hcd.setMobThreshold(0L);
   htd.addFamily(hcd);
   return htd;
 }
 private HTableDescriptor createTableDesc() {
   String tableName =
       "ittable-" + String.format("%010d", RandomUtils.nextInt(Integer.MAX_VALUE));
   String familyName = "cf-" + Math.abs(RandomUtils.nextInt());
   HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(tableName));
   // add random column family
   htd.addFamily(new HColumnDescriptor(familyName));
   return htd;
 }
Example #8
0
 @Test
 public void createTableInDefaultNamespace() throws Exception {
   HTableDescriptor desc = new HTableDescriptor(TableName.valueOf("default_table"));
   HColumnDescriptor colDesc = new HColumnDescriptor("cf1");
   desc.addFamily(colDesc);
   admin.createTable(desc);
   assertTrue(admin.listTables().length == 1);
   admin.disableTable(desc.getTableName());
   admin.deleteTable(desc.getTableName());
 }
 /** Test that we add and remove strings from configuration properly. */
 @Test
 public void testAddGetRemoveConfiguration() throws Exception {
   HTableDescriptor desc = new HTableDescriptor("table");
   String key = "Some";
   String value = "value";
   desc.setConfiguration(key, value);
   assertEquals(value, desc.getConfigurationValue(key));
   desc.removeConfiguration(key);
   assertEquals(null, desc.getConfigurationValue(key));
 }
 @Test
 public void testReadingHTDFromFS() throws IOException {
   final String name = "testReadingHTDFromFS";
   FileSystem fs = FileSystem.get(UTIL.getConfiguration());
   HTableDescriptor htd = new HTableDescriptor(name);
   Path rootdir = UTIL.getDataTestDir(name);
   createHTDInFS(fs, rootdir, htd);
   HTableDescriptor htd2 =
       FSTableDescriptors.getTableDescriptor(fs, rootdir, htd.getNameAsString());
   assertTrue(htd.equals(htd2));
 }
 @Test
 public void testRemoves() throws IOException {
   final String name = "testRemoves";
   FileSystem fs = FileSystem.get(UTIL.getConfiguration());
   // Cleanup old tests if any detrius laying around.
   Path rootdir = new Path(UTIL.getDataTestDir(), name);
   TableDescriptors htds = new FSTableDescriptors(fs, rootdir);
   HTableDescriptor htd = new HTableDescriptor(name);
   htds.add(htd);
   assertNotNull(htds.remove(htd.getNameAsString()));
   assertNull(htds.remove(htd.getNameAsString()));
 }
Example #12
0
 /**
  * Test cps in the table description
  *
  * @throws Exception
  */
 @Test
 public void testGetSetRemoveCP() throws Exception {
   HTableDescriptor desc = new HTableDescriptor("table");
   // simple CP
   String className = BaseRegionObserver.class.getName();
   // add and check that it is present
   desc.addCoprocessor(className);
   assertTrue(desc.hasCoprocessor(className));
   // remove it and check that it is gone
   desc.removeCoprocessor(className);
   assertFalse(desc.hasCoprocessor(className));
 }
Example #13
0
 @Test
 public void createTableInSystemNamespace() throws Exception {
   TableName tableName = TableName.valueOf("hbase:createTableInSystemNamespace");
   HTableDescriptor desc = new HTableDescriptor(tableName);
   HColumnDescriptor colDesc = new HColumnDescriptor("cf1");
   desc.addFamily(colDesc);
   admin.createTable(desc);
   assertEquals(0, admin.listTables().length);
   assertTrue(admin.tableExists(tableName));
   admin.disableTable(desc.getTableName());
   admin.deleteTable(desc.getTableName());
 }
Example #14
0
 @Before
 public void beforeMethod() throws IOException {
   for (HTableDescriptor desc : admin.listTables(prefix + ".*")) {
     admin.disableTable(desc.getTableName());
     admin.deleteTable(desc.getTableName());
   }
   for (NamespaceDescriptor ns : admin.listNamespaceDescriptors()) {
     if (ns.getName().startsWith(prefix)) {
       admin.deleteNamespace(ns.getName());
     }
   }
 }
Example #15
0
 public void createTable(String tableName, List<String> columnFamilies) {
   try {
     Admin admin = connection.getAdmin();
     HTableDescriptor descriptor = new HTableDescriptor(TableName.valueOf(tableName));
     for (String family : columnFamilies) {
       descriptor.addFamily(new HColumnDescriptor(family));
     }
     admin.createTable(descriptor);
   } catch (IOException e) {
     e.printStackTrace();
   }
 }
    @Override
    void perform() throws IOException {
      HTableDescriptor selected = selectTable(disabledTables);
      if (selected == null) {
        return;
      }
      HColumnDescriptor columnDesc = selectFamily(selected);
      if (columnDesc == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      int versions = RandomUtils.nextInt(10) + 3;
      try {
        TableName tableName = selected.getTableName();
        LOG.info(
            "Altering versions of column family: "
                + columnDesc
                + " to: "
                + versions
                + " in table: "
                + tableName);
        columnDesc.setMinVersions(versions);
        columnDesc.setMaxVersions(versions);
        admin.modifyTable(tableName, selected);
        // assertion
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        HColumnDescriptor freshColumnDesc = freshTableDesc.getFamily(columnDesc.getName());
        Assert.assertEquals(
            "Column family: " + columnDesc + " was not altered",
            freshColumnDesc.getMaxVersions(),
            versions);
        Assert.assertEquals(
            "Column family: " + freshColumnDesc + " was not altered",
            freshColumnDesc.getMinVersions(),
            versions);
        LOG.info(
            "Altered versions of column family: "
                + columnDesc
                + " to: "
                + versions
                + " in table: "
                + tableName);
        disabledTables.put(tableName, freshTableDesc);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        throw e;
      } finally {
        admin.close();
      }
      verifyTables();
    }
Example #17
0
 @Test
 public void testPb() throws DeserializationException, IOException {
   HTableDescriptor htd = new HTableDescriptor(HTableDescriptor.META_TABLEDESC);
   final int v = 123;
   htd.setMaxFileSize(v);
   htd.setDurability(Durability.ASYNC_WAL);
   htd.setReadOnly(true);
   byte[] bytes = htd.toByteArray();
   HTableDescriptor deserializedHtd = HTableDescriptor.parseFrom(bytes);
   assertEquals(htd, deserializedHtd);
   assertEquals(v, deserializedHtd.getMaxFileSize());
   assertTrue(deserializedHtd.isReadOnly());
   assertEquals(Durability.ASYNC_WAL, deserializedHtd.getDurability());
 }
 @Test
 public void testHTableDescriptors() throws IOException, InterruptedException {
   final String name = "testHTableDescriptors";
   FileSystem fs = FileSystem.get(UTIL.getConfiguration());
   // Cleanup old tests if any debris laying around.
   Path rootdir = new Path(UTIL.getDataTestDir(), name);
   final int count = 10;
   // Write out table infos.
   for (int i = 0; i < count; i++) {
     HTableDescriptor htd = new HTableDescriptor(name + i);
     createHTDInFS(fs, rootdir, htd);
   }
   FSTableDescriptors htds =
       new FSTableDescriptors(fs, rootdir) {
         @Override
         public HTableDescriptor get(byte[] tablename)
             throws TableExistsException, FileNotFoundException, IOException {
           LOG.info(Bytes.toString(tablename) + ", cachehits=" + this.cachehits);
           return super.get(tablename);
         }
       };
   for (int i = 0; i < count; i++) {
     assertTrue(htds.get(Bytes.toBytes(name + i)) != null);
   }
   for (int i = 0; i < count; i++) {
     assertTrue(htds.get(Bytes.toBytes(name + i)) != null);
   }
   // Update the table infos
   for (int i = 0; i < count; i++) {
     HTableDescriptor htd = new HTableDescriptor(name + i);
     htd.addFamily(new HColumnDescriptor("" + i));
     FSTableDescriptors.updateHTableDescriptor(fs, rootdir, htd);
   }
   // Wait a while so mod time we write is for sure different.
   Thread.sleep(100);
   for (int i = 0; i < count; i++) {
     assertTrue(htds.get(Bytes.toBytes(name + i)) != null);
   }
   for (int i = 0; i < count; i++) {
     assertTrue(htds.get(Bytes.toBytes(name + i)) != null);
   }
   assertEquals(count * 4, htds.invocations);
   assertTrue(
       "expected=" + (count * 2) + ", actual=" + htds.cachehits, htds.cachehits >= (count * 2));
   assertTrue(htds.get(HConstants.ROOT_TABLE_NAME) != null);
   assertEquals(htds.invocations, count * 4 + 1);
   assertTrue(
       "expected=" + ((count * 2) + 1) + ", actual=" + htds.cachehits,
       htds.cachehits >= ((count * 2) + 1));
 }
Example #19
0
  @Test
  public void verifyReservedNS() throws IOException {
    // verify existence of reserved namespaces
    NamespaceDescriptor ns =
        admin.getNamespaceDescriptor(NamespaceDescriptor.DEFAULT_NAMESPACE.getName());
    assertNotNull(ns);
    assertEquals(ns.getName(), NamespaceDescriptor.DEFAULT_NAMESPACE.getName());
    assertNotNull(zkNamespaceManager.get(NamespaceDescriptor.DEFAULT_NAMESPACE_NAME_STR));

    ns = admin.getNamespaceDescriptor(NamespaceDescriptor.SYSTEM_NAMESPACE.getName());
    assertNotNull(ns);
    assertEquals(ns.getName(), NamespaceDescriptor.SYSTEM_NAMESPACE.getName());
    assertNotNull(zkNamespaceManager.get(NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR));

    assertEquals(2, admin.listNamespaceDescriptors().length);

    // verify existence of system tables
    Set<TableName> systemTables =
        Sets.newHashSet(TableName.META_TABLE_NAME, TableName.NAMESPACE_TABLE_NAME);
    HTableDescriptor[] descs =
        admin.listTableDescriptorsByNamespace(NamespaceDescriptor.SYSTEM_NAMESPACE.getName());
    assertEquals(systemTables.size(), descs.length);
    for (HTableDescriptor desc : descs) {
      assertTrue(systemTables.contains(desc.getTableName()));
    }
    // verify system tables aren't listed
    assertEquals(0, admin.listTables().length);

    // Try creating default and system namespaces.
    boolean exceptionCaught = false;
    try {
      admin.createNamespace(NamespaceDescriptor.DEFAULT_NAMESPACE);
    } catch (IOException exp) {
      LOG.warn(exp);
      exceptionCaught = true;
    } finally {
      assertTrue(exceptionCaught);
    }

    exceptionCaught = false;
    try {
      admin.createNamespace(NamespaceDescriptor.SYSTEM_NAMESPACE);
    } catch (IOException exp) {
      LOG.warn(exp);
      exceptionCaught = true;
    } finally {
      assertTrue(exceptionCaught);
    }
  }
    @Override
    void perform() throws IOException {
      HTableDescriptor selected = selectTable(disabledTables);
      if (selected == null) {
        return;
      }
      HColumnDescriptor columnDesc = selectFamily(selected);
      if (columnDesc == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      try {
        TableName tableName = selected.getTableName();
        // possible DataBlockEncoding ids
        int[] possibleIds = {0, 2, 3, 4, 6};
        short id = (short) possibleIds[RandomUtils.nextInt(possibleIds.length)];
        LOG.info(
            "Altering encoding of column family: "
                + columnDesc
                + " to: "
                + id
                + " in table: "
                + tableName);
        columnDesc.setDataBlockEncoding(DataBlockEncoding.getEncodingById(id));
        admin.modifyTable(tableName, selected);
        // assertion
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        HColumnDescriptor freshColumnDesc = freshTableDesc.getFamily(columnDesc.getName());
        Assert.assertEquals(
            "Encoding of column family: " + columnDesc + " was not altered",
            freshColumnDesc.getDataBlockEncoding().getId(),
            id);
        LOG.info(
            "Altered encoding of column family: "
                + freshColumnDesc
                + " to: "
                + id
                + " in table: "
                + tableName);
        disabledTables.put(tableName, freshTableDesc);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        throw e;
      } finally {
        admin.close();
      }
      verifyTables();
    }
Example #21
0
 private void initHRegion(
     byte[] tableName, String callingMethod, Configuration conf, byte[]... families)
     throws IOException {
   HTableDescriptor htd = new HTableDescriptor(tableName);
   for (byte[] family : families) {
     htd.addFamily(new HColumnDescriptor(family));
   }
   HRegionInfo info = new HRegionInfo(htd.getName(), null, null, false);
   Path path = new Path(DIR + callingMethod);
   if (fs.exists(path)) {
     if (!fs.delete(path, true)) {
       throw new IOException("Failed delete of " + path);
     }
   }
   region = HRegion.createHRegion(info, path, conf, htd);
 }
 @Test
 public void testCreateAndUpdate() throws IOException {
   Path testdir = UTIL.getDataTestDir("testCreateAndUpdate");
   HTableDescriptor htd = new HTableDescriptor("testCreate");
   FileSystem fs = FileSystem.get(UTIL.getConfiguration());
   assertTrue(FSTableDescriptors.createTableDescriptor(fs, testdir, htd));
   assertFalse(FSTableDescriptors.createTableDescriptor(fs, testdir, htd));
   FileStatus[] statuses = fs.listStatus(testdir);
   assertTrue("statuses.length=" + statuses.length, statuses.length == 1);
   for (int i = 0; i < 10; i++) {
     FSTableDescriptors.updateHTableDescriptor(fs, testdir, htd);
   }
   statuses = fs.listStatus(testdir);
   assertTrue(statuses.length == 1);
   Path tmpTableDir = new Path(FSUtils.getTablePath(testdir, htd.getName()), ".tmp");
   statuses = fs.listStatus(tmpTableDir);
   assertTrue(statuses.length == 0);
 }
    // populate tables
    @Override
    void perform() throws IOException {
      HTableDescriptor selected = selectTable(enabledTables);
      if (selected == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      TableName tableName = selected.getTableName();
      try (Table table = connection.getTable(tableName)) {
        ArrayList<HRegionInfo> regionInfos =
            new ArrayList<HRegionInfo>(admin.getTableRegions(selected.getTableName()));
        int numRegions = regionInfos.size();
        // average number of rows to be added per action to each region
        int average_rows = 1;
        int numRows = average_rows * numRegions;
        LOG.info("Adding " + numRows + " rows to table: " + selected);
        for (int i = 0; i < numRows; i++) {
          // nextInt(Integer.MAX_VALUE)) to return positive numbers only
          byte[] rowKey =
              Bytes.toBytes(
                  "row-" + String.format("%010d", RandomUtils.nextInt(Integer.MAX_VALUE)));
          HColumnDescriptor cfd = selectFamily(selected);
          if (cfd == null) {
            return;
          }
          byte[] family = cfd.getName();
          byte[] qualifier = Bytes.toBytes("col-" + RandomUtils.nextInt(Integer.MAX_VALUE) % 10);
          byte[] value = Bytes.toBytes("val-" + RandomStringUtils.randomAlphanumeric(10));
          Put put = new Put(rowKey);
          put.addColumn(family, qualifier, value);
          table.put(put);
        }
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        enabledTables.put(tableName, freshTableDesc);
        LOG.info("Added " + numRows + " rows to table: " + selected);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        throw e;
      } finally {
        admin.close();
      }
      verifyTables();
    }
  @BeforeClass
  public static void setUpBeforeClass() throws Exception {
    conf1 = HBaseConfiguration.create();
    conf1.set(HConstants.ZOOKEEPER_ZNODE_PARENT, "/1");
    // smaller block size and capacity to trigger more operations
    // and test them
    conf1.setInt("hbase.regionserver.hlog.blocksize", 1024 * 20);
    conf1.setInt("replication.source.size.capacity", 1024);
    conf1.setLong("replication.source.sleepforretries", 100);
    conf1.setInt("hbase.regionserver.maxlogs", 10);
    conf1.setLong("hbase.master.logcleaner.ttl", 10);
    conf1.setBoolean(HConstants.REPLICATION_ENABLE_KEY, true);
    conf1.setBoolean("dfs.support.append", true);
    conf1.setLong(HConstants.THREAD_WAKE_FREQUENCY, 100);
    conf1.setStrings(
        CoprocessorHost.USER_REGION_COPROCESSOR_CONF_KEY,
        "org.apache.hadoop.hbase.replication.TestMasterReplication$CoprocessorCounter");

    utility1 = new HBaseTestingUtility(conf1);
    utility1.startMiniZKCluster();
    MiniZooKeeperCluster miniZK = utility1.getZkCluster();
    new ZooKeeperWatcher(conf1, "cluster1", null, true);

    conf2 = new Configuration(conf1);
    conf2.set(HConstants.ZOOKEEPER_ZNODE_PARENT, "/2");

    conf3 = new Configuration(conf1);
    conf3.set(HConstants.ZOOKEEPER_ZNODE_PARENT, "/3");

    utility2 = new HBaseTestingUtility(conf2);
    utility2.setZkCluster(miniZK);
    new ZooKeeperWatcher(conf2, "cluster3", null, true);

    utility3 = new HBaseTestingUtility(conf3);
    utility3.setZkCluster(miniZK);
    new ZooKeeperWatcher(conf3, "cluster3", null, true);

    table = new HTableDescriptor(tableName);
    HColumnDescriptor fam = new HColumnDescriptor(famName);
    fam.setScope(HConstants.REPLICATION_SCOPE_GLOBAL);
    table.addFamily(fam);
    fam = new HColumnDescriptor(noRepfamName);
    table.addFamily(fam);
  }
    @Override
    void perform() throws IOException {

      HTableDescriptor selected = selectTable(disabledTables);
      if (selected == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      try {
        TableName tableName = selected.getTableName();
        LOG.info("Enabling table :" + selected);
        admin.enableTable(tableName);
        Assert.assertTrue(
            "Table: " + selected + " was not enabled", admin.isTableEnabled(tableName));
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        enabledTables.put(tableName, freshTableDesc);
        LOG.info("Enabled table :" + freshTableDesc);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        // TODO workaround
        // loose restriction for TableNotDisabledException/TableNotEnabledException thrown in sync
        // operations 1) when enable/disable starts, the table state is changed to
        // ENABLING/DISABLING (ZK node in 1.x), which will be further changed to ENABLED/DISABLED
        // once the operation completes 2) if master failover happens in the middle of the
        // enable/disable operation, the new master will try to recover the tables in
        // ENABLING/DISABLING state, as programmed in
        // AssignmentManager#recoverTableInEnablingState() and
        // AssignmentManager#recoverTableInDisablingState()
        // 3) after the new master initialization completes, the procedure tries to re-do the
        // enable/disable operation, which was already done. Ignore those exceptions before
        // change of behaviors of AssignmentManager in presence of PV2
        if (e instanceof TableNotDisabledException) {
          LOG.warn("Caught TableNotDisabledException in action: " + this.getClass());
          e.printStackTrace();
        } else {
          throw e;
        }
      } finally {
        admin.close();
      }
      verifyTables();
    }
Example #26
0
 @Test
 public void testIllegalHTableNames() {
   for (String tn : illegalTableNames) {
     try {
       HTableDescriptor.isLegalTableName(Bytes.toBytes(tn));
       fail("invalid tablename " + tn + " should have failed");
     } catch (Exception e) {
       // expected
     }
   }
 }
 // ColumnAction has implemented selectFamily() shared by multiple family Actions
 protected HColumnDescriptor selectFamily(HTableDescriptor htd) {
   if (htd == null) {
     return null;
   }
   HColumnDescriptor[] families = htd.getColumnFamilies();
   if (families.length == 0) {
     LOG.info("No column families in table: " + htd);
     return null;
   }
   HColumnDescriptor randomCfd = families[RandomUtils.nextInt(families.length)];
   return randomCfd;
 }
 /** Create the Mob Table. */
 public static void createMobTable(
     final HBaseTestingUtility util,
     final TableName tableName,
     int regionReplication,
     final byte[]... families)
     throws IOException, InterruptedException {
   HTableDescriptor htd = new HTableDescriptor(tableName);
   htd.setRegionReplication(regionReplication);
   for (byte[] family : families) {
     HColumnDescriptor hcd = new HColumnDescriptor(family);
     hcd.setMobEnabled(true);
     hcd.setMobThreshold(0L);
     htd.addFamily(hcd);
   }
   byte[][] splitKeys = SnapshotTestingUtils.getSplitKeys();
   util.getHBaseAdmin().createTable(htd, splitKeys);
   SnapshotTestingUtils.waitForTableToBeOnline(util, tableName);
   assertEquals(
       (splitKeys.length + 1) * regionReplication,
       util.getHBaseAdmin().getTableRegions(tableName).size());
 }
    @Override
    void perform() throws IOException {
      HTableDescriptor selected = selectTable(disabledTables);
      HColumnDescriptor cfd = selectFamily(selected);
      if (selected == null || cfd == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      try {
        if (selected.getColumnFamilies().length < 2) {
          LOG.info("No enough column families to delete in table " + selected.getTableName());
          return;
        }
        TableName tableName = selected.getTableName();
        LOG.info("Deleting column family: " + cfd + " from table: " + tableName);
        admin.deleteColumnFamily(tableName, cfd.getName());
        // assertion
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        Assert.assertFalse(
            "Column family: " + cfd + " was not added", freshTableDesc.hasFamily(cfd.getName()));
        LOG.info("Deleted column family: " + cfd + " from table: " + tableName);
        disabledTables.put(tableName, freshTableDesc);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        throw e;
      } finally {
        admin.close();
      }
      verifyTables();
    }
    @Override
    void perform() throws IOException {
      HTableDescriptor selected = selectTable(disabledTables);
      if (selected == null) {
        return;
      }

      Admin admin = connection.getAdmin();
      try {
        HColumnDescriptor cfd = createFamilyDesc();
        if (selected.hasFamily(cfd.getName())) {
          LOG.info(
              new String(cfd.getName()) + " already exists in table " + selected.getTableName());
          return;
        }
        TableName tableName = selected.getTableName();
        LOG.info("Adding column family: " + cfd + " to table: " + tableName);
        admin.addColumn(tableName, cfd);
        // assertion
        HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
        Assert.assertTrue(
            "Column family: " + cfd + " was not added", freshTableDesc.hasFamily(cfd.getName()));
        LOG.info("Added column family: " + cfd + " to table: " + tableName);
        disabledTables.put(tableName, freshTableDesc);
      } catch (Exception e) {
        LOG.warn("Caught exception in action: " + this.getClass());
        throw e;
      } finally {
        admin.close();
      }
      verifyTables();
    }