server/src/test/java/org/apache/iotdb/db/integration/IoTDBRecoverIT.java - iotdb - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 package org.apache.iotdb.db.integration;

 import org.apache.iotdb.db.utils.EnvironmentUtils;
 import org.apache.iotdb.jdbc.Config;

 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.Locale;

 import static org.apache.iotdb.db.constant.TestConstant.count;
 import static org.apache.iotdb.db.constant.TestConstant.max_value;
 import static org.apache.iotdb.db.constant.TestConstant.min_time;
 import static org.apache.iotdb.db.constant.TestConstant.min_value;
 import static org.junit.Assert.fail;

 public class IoTDBRecoverIT {

   private static final String TIMESTAMP_STR = "Time";
   private static final String TEMPERATURE_STR = "root.ln.wf01.wt01.temperature";
   private static String[] creationSqls =
       new String[] {
         "SET STORAGE GROUP TO root.vehicle.d0",
         "SET STORAGE GROUP TO root.vehicle.d1",
         "CREATE TIMESERIES root.vehicle.d0.s0 WITH DATATYPE=INT32, ENCODING=RLE",
         "CREATE TIMESERIES root.vehicle.d0.s1 WITH DATATYPE=INT64, ENCODING=RLE",
         "CREATE TIMESERIES root.vehicle.d0.s2 WITH DATATYPE=FLOAT, ENCODING=RLE",
         "CREATE TIMESERIES root.vehicle.d0.s3 WITH DATATYPE=TEXT, ENCODING=PLAIN",
         "CREATE TIMESERIES root.vehicle.d0.s4 WITH DATATYPE=BOOLEAN, ENCODING=PLAIN"
       };
   private static String[] dataSet2 =
       new String[] {
         "SET STORAGE GROUP TO root.ln.wf01.wt01",
         "CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
         "CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=PLAIN",
         "CREATE TIMESERIES root.ln.wf01.wt01.hardware WITH DATATYPE=INT32, ENCODING=PLAIN",
         "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
             + "values(1, 1.1, false, 11)",
         "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
             + "values(2, 2.2, true, 22)",
         "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
             + "values(3, 3.3, false, 33 )",
         "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
             + "values(4, 4.4, false, 44)",
         "INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
             + "values(5, 5.5, false, 55)"
       };
   private final String d0s0 = "root.vehicle.d0.s0";
   private final String d0s1 = "root.vehicle.d0.s1";
   private final String d0s2 = "root.vehicle.d0.s2";
   private final String d0s3 = "root.vehicle.d0.s3";
   private String insertTemplate =
       "INSERT INTO root.vehicle.d0(timestamp,s0,s1,s2,s3,s4)" + " VALUES(%d,%d,%d,%f,%s,%s)";

   @Before
   public void setUp() throws Exception {
     EnvironmentUtils.closeStatMonitor();

     EnvironmentUtils.envSetUp();
     Class.forName(Config.JDBC_DRIVER_NAME);
     prepareData();
   }

   @After
   public void tearDown() throws Exception {
     EnvironmentUtils.cleanEnv();
   }

   @Test
   public void mergeTest() {
     String[] retArray = new String[] {"0,2", "0,4", "0,3"};
     try (Connection connection =
             DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {

       boolean hasResultSet =
           statement.execute("select count(temperature) from root.ln.wf01.wt01 where time > 3");

       Assert.assertTrue(hasResultSet);
       int cnt;
       try (ResultSet resultSet = statement.getResultSet()) {
         cnt = 0;
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(count(TEMPERATURE_STR));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(1, cnt);
       }

       hasResultSet =
           statement.execute("select min_time(temperature) from root.ln.wf01.wt01 where time > 3");

       Assert.assertTrue(hasResultSet);
       try (ResultSet resultSet = statement.getResultSet()) {
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(min_time(TEMPERATURE_STR));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(2, cnt);
       }

       hasResultSet =
           statement.execute(
               "select min_time(temperature) from root.ln.wf01.wt01 where temperature > 3");

       Assert.assertTrue(hasResultSet);
       try (ResultSet resultSet = statement.getResultSet()) {
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(min_time(TEMPERATURE_STR));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(3, cnt);
       }

     } catch (Exception e) {
       e.printStackTrace();
       fail(e.getMessage());
     }

     // we want to recover
     EnvironmentUtils.stopDaemon();
     // wait for close
     try {
       Thread.sleep(1000);
     } catch (InterruptedException e) {
       e.printStackTrace();
       Thread.currentThread().interrupt();
     }
     EnvironmentUtils.activeDaemon();

     // count test
     retArray = new String[] {"0,2001,2001,2001,2001", "0,7500,7500,7500,7500"};
     try (Connection connection =
             DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {
       boolean hasResultSet =
           statement.execute(
               "select count(s0),count(s1),count(s2),count(s3) "
                   + "from root.vehicle.d0 where time >= 6000 and time <= 9000");

       Assert.assertTrue(hasResultSet);
       int cnt;
       try (ResultSet resultSet = statement.getResultSet()) {
         cnt = 0;
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(count(d0s0))
                   + ","
                   + resultSet.getString(count(d0s1))
                   + ","
                   + resultSet.getString(count(d0s2))
                   + ","
                   + resultSet.getString(count(d0s3));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(1, cnt);
       }

       hasResultSet =
           statement.execute(
               "select count(s0),count(s1),count(s2),count(s3) " + "from root.vehicle.d0");

       Assert.assertTrue(hasResultSet);
       try (ResultSet resultSet = statement.getResultSet()) {
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(count(d0s0))
                   + ","
                   + resultSet.getString(count(d0s1))
                   + ","
                   + resultSet.getString(count(d0s2))
                   + ","
                   + resultSet.getString(count(d0s3));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(2, cnt);
       }
     } catch (Exception e) {
       e.printStackTrace();
       fail(e.getMessage());
     }

     // we want to recover
     EnvironmentUtils.stopDaemon();
     // wait for close
     try {
       Thread.sleep(1000);
     } catch (InterruptedException e) {
       e.printStackTrace();
       Thread.currentThread().interrupt();
     }

     EnvironmentUtils.activeDaemon();

     // maxminValueTest

     retArray = new String[] {"0,8499,500.0", "0,2499,500.0"};
     try (Connection connection =
             DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {

       boolean hasResultSet =
           statement.execute(
               "select max_value(s0),min_value(s2) "
                   + "from root.vehicle.d0 where time >= 100 and time < 9000");

       Assert.assertTrue(hasResultSet);
       int cnt;
       try (ResultSet resultSet = statement.getResultSet()) {
         cnt = 0;
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(max_value(d0s0))
                   + ","
                   + resultSet.getString(min_value(d0s2));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(1, cnt);
       }

       hasResultSet =
           statement.execute(
               "select max_value(s0),min_value(s2) " + "from root.vehicle.d0 where time < 2500");

       Assert.assertTrue(hasResultSet);
       try (ResultSet resultSet = statement.getResultSet()) {
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(max_value(d0s0))
                   + ","
                   + resultSet.getString(min_value(d0s2));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(2, cnt);
       }
     } catch (Exception e) {
       e.printStackTrace();
       fail(e.getMessage());
     }
   }

   @Test
   public void vmTest() throws SQLException {
     try (Connection connection =
             DriverManager.getConnection(
                 Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {
       // prepare more data to flush
       for (int i = 2000; i < 2500; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
       }
       statement.execute("flush");
     }

     // we want to recover
     EnvironmentUtils.stopDaemon();
     // wait for close
     try {
       Thread.sleep(1000);
     } catch (InterruptedException e) {
       e.printStackTrace();
       Thread.currentThread().interrupt();
     }
     EnvironmentUtils.activeDaemon();

     // count test
     String[] retArray = new String[] {"0,2001,2001,2001,2001", "0,7500,7500,7500,7500"};
     try (Connection connection =
             DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {
       boolean hasResultSet =
           statement.execute(
               "select count(s0),count(s1),count(s2),count(s3) "
                   + "from root.vehicle.d0 where time >= 6000 and time <= 9000");

       Assert.assertTrue(hasResultSet);
       int cnt;
       try (ResultSet resultSet = statement.getResultSet()) {
         cnt = 0;
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(count(d0s0))
                   + ","
                   + resultSet.getString(count(d0s1))
                   + ","
                   + resultSet.getString(count(d0s2))
                   + ","
                   + resultSet.getString(count(d0s3));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(1, cnt);
       }

       hasResultSet =
           statement.execute(
               "select count(s0),count(s1),count(s2),count(s3) " + "from root.vehicle.d0");

       Assert.assertTrue(hasResultSet);
       try (ResultSet resultSet = statement.getResultSet()) {
         while (resultSet.next()) {
           String ans =
               resultSet.getString(TIMESTAMP_STR)
                   + ","
                   + resultSet.getString(count(d0s0))
                   + ","
                   + resultSet.getString(count(d0s1))
                   + ","
                   + resultSet.getString(count(d0s2))
                   + ","
                   + resultSet.getString(count(d0s3));
           Assert.assertEquals(retArray[cnt], ans);
           cnt++;
         }
         Assert.assertEquals(2, cnt);
       }
     } catch (Exception e) {
       e.printStackTrace();
       fail(e.getMessage());
     }
   }

   private void prepareData() {
     try (Connection connection =
             DriverManager.getConnection(
                 Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
         Statement statement = connection.createStatement()) {

       for (String sql : creationSqls) {
         statement.execute(sql);
       }

       for (String sql : dataSet2) {
         statement.execute(sql);
       }

       // prepare BufferWrite file
       for (int i = 5000; i < 7000; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
       }
       statement.execute("flush");
       for (int i = 7500; i < 8500; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
       }
       statement.execute("flush");
       // prepare Unseq-File
       for (int i = 500; i < 1500; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
       }
       statement.execute("flush");
       for (int i = 3000; i < 6500; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
       }
       statement.execute("merge");

       // prepare BufferWrite cache
       for (int i = 9000; i < 10000; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
       }
       // prepare Overflow cache
       for (int i = 2000; i < 2500; i++) {
         statement.execute(
             String.format(
                 Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
       }

     } catch (Exception e) {
       e.printStackTrace();
     }
   }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	package org.apache.iotdb.db.integration;

	import org.apache.iotdb.db.utils.EnvironmentUtils;
	import org.apache.iotdb.jdbc.Config;

	import org.junit.After;
	import org.junit.Assert;
	import org.junit.Before;
	import org.junit.Test;

	import java.sql.Connection;
	import java.sql.DriverManager;
	import java.sql.ResultSet;
	import java.sql.SQLException;
	import java.sql.Statement;
	import java.util.Locale;

	import static org.apache.iotdb.db.constant.TestConstant.count;
	import static org.apache.iotdb.db.constant.TestConstant.max_value;
	import static org.apache.iotdb.db.constant.TestConstant.min_time;
	import static org.apache.iotdb.db.constant.TestConstant.min_value;
	import static org.junit.Assert.fail;

	public class IoTDBRecoverIT {

	private static final String TIMESTAMP_STR = "Time";
	private static final String TEMPERATURE_STR = "root.ln.wf01.wt01.temperature";
	private static String[] creationSqls =
	new String[] {
	"SET STORAGE GROUP TO root.vehicle.d0",
	"SET STORAGE GROUP TO root.vehicle.d1",
	"CREATE TIMESERIES root.vehicle.d0.s0 WITH DATATYPE=INT32, ENCODING=RLE",
	"CREATE TIMESERIES root.vehicle.d0.s1 WITH DATATYPE=INT64, ENCODING=RLE",
	"CREATE TIMESERIES root.vehicle.d0.s2 WITH DATATYPE=FLOAT, ENCODING=RLE",
	"CREATE TIMESERIES root.vehicle.d0.s3 WITH DATATYPE=TEXT, ENCODING=PLAIN",
	"CREATE TIMESERIES root.vehicle.d0.s4 WITH DATATYPE=BOOLEAN, ENCODING=PLAIN"
	};
	private static String[] dataSet2 =
	new String[] {
	"SET STORAGE GROUP TO root.ln.wf01.wt01",
	"CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN",
	"CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=PLAIN",
	"CREATE TIMESERIES root.ln.wf01.wt01.hardware WITH DATATYPE=INT32, ENCODING=PLAIN",
	"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
	+ "values(1, 1.1, false, 11)",
	"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
	+ "values(2, 2.2, true, 22)",
	"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
	+ "values(3, 3.3, false, 33 )",
	"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
	+ "values(4, 4.4, false, 44)",
	"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
	+ "values(5, 5.5, false, 55)"
	};
	private final String d0s0 = "root.vehicle.d0.s0";
	private final String d0s1 = "root.vehicle.d0.s1";
	private final String d0s2 = "root.vehicle.d0.s2";
	private final String d0s3 = "root.vehicle.d0.s3";
	private String insertTemplate =
	"INSERT INTO root.vehicle.d0(timestamp,s0,s1,s2,s3,s4)" + " VALUES(%d,%d,%d,%f,%s,%s)";

	@Before
	public void setUp() throws Exception {
	EnvironmentUtils.closeStatMonitor();

	EnvironmentUtils.envSetUp();
	Class.forName(Config.JDBC_DRIVER_NAME);
	prepareData();
	}

	@After
	public void tearDown() throws Exception {
	EnvironmentUtils.cleanEnv();
	}

	@Test
	public void mergeTest() {
	String[] retArray = new String[] {"0,2", "0,4", "0,3"};
	try (Connection connection =
	DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {

	boolean hasResultSet =
	statement.execute("select count(temperature) from root.ln.wf01.wt01 where time > 3");

	Assert.assertTrue(hasResultSet);
	int cnt;
	try (ResultSet resultSet = statement.getResultSet()) {
	cnt = 0;
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(count(TEMPERATURE_STR));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(1, cnt);
	}

	hasResultSet =
	statement.execute("select min_time(temperature) from root.ln.wf01.wt01 where time > 3");

	Assert.assertTrue(hasResultSet);
	try (ResultSet resultSet = statement.getResultSet()) {
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(min_time(TEMPERATURE_STR));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(2, cnt);
	}

	hasResultSet =
	statement.execute(
	"select min_time(temperature) from root.ln.wf01.wt01 where temperature > 3");

	Assert.assertTrue(hasResultSet);
	try (ResultSet resultSet = statement.getResultSet()) {
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(min_time(TEMPERATURE_STR));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(3, cnt);
	}

	} catch (Exception e) {
	e.printStackTrace();
	fail(e.getMessage());
	}

	// we want to recover
	EnvironmentUtils.stopDaemon();
	// wait for close
	try {
	Thread.sleep(1000);
	} catch (InterruptedException e) {
	e.printStackTrace();
	Thread.currentThread().interrupt();
	}
	EnvironmentUtils.activeDaemon();

	// count test
	retArray = new String[] {"0,2001,2001,2001,2001", "0,7500,7500,7500,7500"};
	try (Connection connection =
	DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {
	boolean hasResultSet =
	statement.execute(
	"select count(s0),count(s1),count(s2),count(s3) "
	+ "from root.vehicle.d0 where time >= 6000 and time <= 9000");

	Assert.assertTrue(hasResultSet);
	int cnt;
	try (ResultSet resultSet = statement.getResultSet()) {
	cnt = 0;
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(count(d0s0))
	+ ","
	+ resultSet.getString(count(d0s1))
	+ ","
	+ resultSet.getString(count(d0s2))
	+ ","
	+ resultSet.getString(count(d0s3));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(1, cnt);
	}

	hasResultSet =
	statement.execute(
	"select count(s0),count(s1),count(s2),count(s3) " + "from root.vehicle.d0");

	Assert.assertTrue(hasResultSet);
	try (ResultSet resultSet = statement.getResultSet()) {
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(count(d0s0))
	+ ","
	+ resultSet.getString(count(d0s1))
	+ ","
	+ resultSet.getString(count(d0s2))
	+ ","
	+ resultSet.getString(count(d0s3));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(2, cnt);
	}
	} catch (Exception e) {
	e.printStackTrace();
	fail(e.getMessage());
	}

	// we want to recover
	EnvironmentUtils.stopDaemon();
	// wait for close
	try {
	Thread.sleep(1000);
	} catch (InterruptedException e) {
	e.printStackTrace();
	Thread.currentThread().interrupt();
	}

	EnvironmentUtils.activeDaemon();

	// maxminValueTest

	retArray = new String[] {"0,8499,500.0", "0,2499,500.0"};
	try (Connection connection =
	DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {

	boolean hasResultSet =
	statement.execute(
	"select max_value(s0),min_value(s2) "
	+ "from root.vehicle.d0 where time >= 100 and time < 9000");

	Assert.assertTrue(hasResultSet);
	int cnt;
	try (ResultSet resultSet = statement.getResultSet()) {
	cnt = 0;
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(max_value(d0s0))
	+ ","
	+ resultSet.getString(min_value(d0s2));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(1, cnt);
	}

	hasResultSet =
	statement.execute(
	"select max_value(s0),min_value(s2) " + "from root.vehicle.d0 where time < 2500");

	Assert.assertTrue(hasResultSet);
	try (ResultSet resultSet = statement.getResultSet()) {
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(max_value(d0s0))
	+ ","
	+ resultSet.getString(min_value(d0s2));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(2, cnt);
	}
	} catch (Exception e) {
	e.printStackTrace();
	fail(e.getMessage());
	}
	}

	@Test
	public void vmTest() throws SQLException {
	try (Connection connection =
	DriverManager.getConnection(
	Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {
	// prepare more data to flush
	for (int i = 2000; i < 2500; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
	}
	statement.execute("flush");
	}

	// we want to recover
	EnvironmentUtils.stopDaemon();
	// wait for close
	try {
	Thread.sleep(1000);
	} catch (InterruptedException e) {
	e.printStackTrace();
	Thread.currentThread().interrupt();
	}
	EnvironmentUtils.activeDaemon();

	// count test
	String[] retArray = new String[] {"0,2001,2001,2001,2001", "0,7500,7500,7500,7500"};
	try (Connection connection =
	DriverManager.getConnection("jdbc:iotdb://127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {
	boolean hasResultSet =
	statement.execute(
	"select count(s0),count(s1),count(s2),count(s3) "
	+ "from root.vehicle.d0 where time >= 6000 and time <= 9000");

	Assert.assertTrue(hasResultSet);
	int cnt;
	try (ResultSet resultSet = statement.getResultSet()) {
	cnt = 0;
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(count(d0s0))
	+ ","
	+ resultSet.getString(count(d0s1))
	+ ","
	+ resultSet.getString(count(d0s2))
	+ ","
	+ resultSet.getString(count(d0s3));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(1, cnt);
	}

	hasResultSet =
	statement.execute(
	"select count(s0),count(s1),count(s2),count(s3) " + "from root.vehicle.d0");

	Assert.assertTrue(hasResultSet);
	try (ResultSet resultSet = statement.getResultSet()) {
	while (resultSet.next()) {
	String ans =
	resultSet.getString(TIMESTAMP_STR)
	+ ","
	+ resultSet.getString(count(d0s0))
	+ ","
	+ resultSet.getString(count(d0s1))
	+ ","
	+ resultSet.getString(count(d0s2))
	+ ","
	+ resultSet.getString(count(d0s3));
	Assert.assertEquals(retArray[cnt], ans);
	cnt++;
	}
	Assert.assertEquals(2, cnt);
	}
	} catch (Exception e) {
	e.printStackTrace();
	fail(e.getMessage());
	}
	}

	private void prepareData() {
	try (Connection connection =
	DriverManager.getConnection(
	Config.IOTDB_URL_PREFIX + "127.0.0.1:6667/", "root", "root");
	Statement statement = connection.createStatement()) {

	for (String sql : creationSqls) {
	statement.execute(sql);
	}

	for (String sql : dataSet2) {
	statement.execute(sql);
	}

	// prepare BufferWrite file
	for (int i = 5000; i < 7000; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
	}
	statement.execute("flush");
	for (int i = 7500; i < 8500; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
	}
	statement.execute("flush");
	// prepare Unseq-File
	for (int i = 500; i < 1500; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
	}
	statement.execute("flush");
	for (int i = 3000; i < 6500; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
	}
	statement.execute("merge");

	// prepare BufferWrite cache
	for (int i = 9000; i < 10000; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "true"));
	}
	// prepare Overflow cache
	for (int i = 2000; i < 2500; i++) {
	statement.execute(
	String.format(
	Locale.ENGLISH, insertTemplate, i, i, i, (double) i, "'" + i + "'", "false"));
	}

	} catch (Exception e) {
	e.printStackTrace();
	}
	}
	}