[GitHub] [incubator-iotdb] qiaojialin opened a new pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

qiaojialin opened a new pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248


   Disable partition by default, then the query performance will not decrease in 0.10. 
   Also, the default concurrent write partition is set to 1.


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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

sonarcloud[bot] commented on pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#issuecomment-633057169


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[GitHub] [incubator-iotdb] HTHou commented on a change in pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

HTHou commented on a change in pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#discussion_r429604483



##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");
       System.exit(-1);
     }
-    if (!(properties.getProperty("tsfile_storage_fs").equals(tsfileFileSystem))) {
-      logger.error("Wrong tsfile file system, please set as: " + properties
-              .getProperty("tsfile_storage_fs") + " !");
+
+    if (!(Long.parseLong(properties.getProperty(PARTITION_INTERVAL_STRING))
+        == partitionInterval)) {
+      logger.error("Wrong " + PARTITION_INTERVAL_STRING + ", please set as: " + properties
+          .getProperty(PARTITION_INTERVAL_STRING) + " !");
       System.exit(-1);
     }
-  }
 
-  private void upgradeMlog() {
-    try {
-      MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
-    } catch (IOException e) {
-      logger.error("Upgrade mlog.txt from {} failed.", SCHEMA_DIR, e);
+    if (!(properties.getProperty(TSFILE_FILE_SYSTEM_STRING).equals(tsfileFileSystem))) {
+      logger.error("Wrong " + TSFILE_FILE_SYSTEM_STRING + ", please set as: " + properties
+          .getProperty(TSFILE_FILE_SYSTEM_STRING) + " !");

Review comment:
       ```suggestion
         logger.error("Wrong {}, please set as: {} !", TSFILE_FILE_SYSTEM_STRING, properties
             .getProperty(TSFILE_FILE_SYSTEM_STRING));
   ```

##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");
       System.exit(-1);
     }
-    if (!(properties.getProperty("tsfile_storage_fs").equals(tsfileFileSystem))) {
-      logger.error("Wrong tsfile file system, please set as: " + properties
-              .getProperty("tsfile_storage_fs") + " !");
+
+    if (!(Long.parseLong(properties.getProperty(PARTITION_INTERVAL_STRING))
+        == partitionInterval)) {

Review comment:
       ```suggestion
       if (Long.parseLong(properties.getProperty(PARTITION_INTERVAL_STRING))
           != partitionInterval) {
   ```

##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");

Review comment:
       ```suggestion
         logger.error("Wrong {}, please set as: {} !", TIMESTAMP_PRECISION_STRING, properties
             .getProperty(TIMESTAMP_PRECISION_STRING));
   ```




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[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

qiaojialin commented on a change in pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#discussion_r429612795



##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");
       System.exit(-1);
     }
-    if (!(properties.getProperty("tsfile_storage_fs").equals(tsfileFileSystem))) {
-      logger.error("Wrong tsfile file system, please set as: " + properties
-              .getProperty("tsfile_storage_fs") + " !");
+
+    if (!(Long.parseLong(properties.getProperty(PARTITION_INTERVAL_STRING))
+        == partitionInterval)) {
+      logger.error("Wrong " + PARTITION_INTERVAL_STRING + ", please set as: " + properties
+          .getProperty(PARTITION_INTERVAL_STRING) + " !");
       System.exit(-1);
     }
-  }
 
-  private void upgradeMlog() {
-    try {
-      MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
-    } catch (IOException e) {
-      logger.error("Upgrade mlog.txt from {} failed.", SCHEMA_DIR, e);
+    if (!(properties.getProperty(TSFILE_FILE_SYSTEM_STRING).equals(tsfileFileSystem))) {
+      logger.error("Wrong " + TSFILE_FILE_SYSTEM_STRING + ", please set as: " + properties
+          .getProperty(TSFILE_FILE_SYSTEM_STRING) + " !");

Review comment:
       fixed

##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");
       System.exit(-1);
     }
-    if (!(properties.getProperty("tsfile_storage_fs").equals(tsfileFileSystem))) {
-      logger.error("Wrong tsfile file system, please set as: " + properties
-              .getProperty("tsfile_storage_fs") + " !");
+
+    if (!(Long.parseLong(properties.getProperty(PARTITION_INTERVAL_STRING))
+        == partitionInterval)) {

Review comment:
       fixed

##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfigCheck.java
##########
@@ -37,182 +40,242 @@
 
 public class IoTDBConfigCheck {
 
+  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
+
   // this file is located in data/system/schema/system.properties
   // If user delete folder "data", system.properties can reset.
-  public static final String PROPERTIES_FILE_NAME = "system.properties";
-  public static final String SCHEMA_DIR =
-          IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
-  public static final String WAL_DIR =
-      IoTDBDescriptor.getInstance().getConfig().getWalFolder();
-  private static final Logger logger = LoggerFactory.getLogger(IoTDBDescriptor.class);
-  // this is a initial parameter.
-  private static String timestampPrecision = "ms";
-  private static long partitionInterval = 86400;
-  private static String tsfileFileSystem = "LOCAL";
-  private static String iotdbVersion = "0.10.0";
+  private static final String PROPERTIES_FILE_NAME = "system.properties";
+  private static final String SCHEMA_DIR = IoTDBDescriptor.getInstance().getConfig().getSchemaDir();
+  private static final String WAL_DIR = IoTDBDescriptor.getInstance().getConfig().getWalFolder();
+
+  File propertiesFile;
+  File tmpPropertiesFile;
+
   private Properties properties = new Properties();
 
+  private Map<String, String> systemProperties = new HashMap<>();
+
+  private static final String SYSTEM_PROPERTIES_STRING = "System properties:";
+
+  private static final String TIMESTAMP_PRECISION_STRING = "timestamp_precision";
+  private static String timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+
+  private static final String PARTITION_INTERVAL_STRING = "partition_interval";
+  private static long partitionInterval = IoTDBDescriptor.getInstance().getConfig().getPartitionInterval();
+
+  private static final String TSFILE_FILE_SYSTEM_STRING = "tsfile_storage_fs";
+  private static String tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
+
+  private static final String ENABLE_PARTITION_STRING = "enable_partition";
+  private static boolean enablePartition = IoTDBDescriptor.getInstance().getConfig().isEnablePartition();
+
+  private static final String IOTDB_VERSION_STRING = "iotdb_version";
+  private static String iotdbVersion = "0.10.0";
+
   public static IoTDBConfigCheck getInstance() {
     return IoTDBConfigCheckHolder.INSTANCE;
   }
 
-  public void checkConfig() {
-    timestampPrecision = IoTDBDescriptor.getInstance().getConfig().getTimestampPrecision();
+  private static class IoTDBConfigCheckHolder {
+    private static final IoTDBConfigCheck INSTANCE = new IoTDBConfigCheck();
+  }
+
+  private IoTDBConfigCheck() {
+    logger.info("Starting IoTDB " + iotdbVersion);
+
+    // check whether SCHEMA_DIR exists, create if not exists
+    File dir = SystemFileFactory.INSTANCE.getFile(SCHEMA_DIR);
+    if (!dir.exists()) {
+      if (!dir.mkdirs()) {
+        logger.error("can not create schema dir: {}", SCHEMA_DIR);
+        System.exit(-1);
+      } else {
+        logger.info(" {} dir has been created.", SCHEMA_DIR);
+      }
+    }
 
     // check time stamp precision
     if (!(timestampPrecision.equals("ms") || timestampPrecision.equals("us")
-            || timestampPrecision.equals("ns"))) {
-      logger.error("Wrong timestamp precision, please set as: ms, us or ns ! Current is: "
-              + timestampPrecision);
+        || timestampPrecision.equals("ns"))) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: ms, us or ns ! Current is: "
+          + timestampPrecision);
       System.exit(-1);
     }
 
-    partitionInterval = IoTDBDescriptor.getInstance().getConfig()
-            .getPartitionInterval();
+    if (!enablePartition) {
+      partitionInterval = Long.MAX_VALUE;
+    }
 
     // check partition interval
     if (partitionInterval <= 0) {
       logger.error("Partition interval must larger than 0!");
       System.exit(-1);
     }
 
-    tsfileFileSystem = IoTDBDescriptor.getInstance().getConfig().getTsFileStorageFs().toString();
-    createDir(SCHEMA_DIR);
-    checkFile(SCHEMA_DIR);
-    logger.info("System configuration is ok.");
-    
+    systemProperties.put(TIMESTAMP_PRECISION_STRING, timestampPrecision);
+    systemProperties.put(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+    systemProperties.put(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+    systemProperties.put(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+    systemProperties.put(IOTDB_VERSION_STRING, iotdbVersion);
   }
 
-  private void createDir(String filepath) {
-    File dir = SystemFileFactory.INSTANCE.getFile(filepath);
-    if (!dir.exists()) {
-      dir.mkdirs();
-      logger.info(" {} dir has been created.", SCHEMA_DIR);
-    }
-  }
 
-  private void checkFile(String filepath) {
-    // create file : read timestamp precision from engine.properties, create system.properties
-    // use output stream to write timestamp precision to file.
-    File file = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    File tmpPropertiesFile = new File(file.getAbsoluteFile() + ".tmp");
-    try {
-      if (!file.exists() && !tmpPropertiesFile.exists()) {
-        file.createNewFile();
-        logger.info(" {} has been created.", file.getAbsolutePath());
-        try (FileOutputStream outputStream = new FileOutputStream(file.toString())) {
-          properties.setProperty("timestamp_precision", timestampPrecision);
-          properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-          properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-          properties.setProperty("iotdb_version", iotdbVersion);
-          properties.store(outputStream, "System properties:");
-        }
-        return;
+  /**
+   * check configuration in system.properties when starting IoTDB
+   *
+   * When init: create system.properties directly
+   *
+   * When upgrading the system.properties:
+   * (1) create system.properties.tmp
+   * (2) delete system.properties
+   * (2) rename system.properties.tmp to system.properties
+   */
+  public void checkConfig() throws IOException {
+    propertiesFile = SystemFileFactory.INSTANCE
+            .getFile(IoTDBConfigCheck.SCHEMA_DIR + File.separator + PROPERTIES_FILE_NAME);
+    tmpPropertiesFile = new File(propertiesFile.getAbsoluteFile() + ".tmp");
+
+    // system init first time, no need to check, write system.properties and return
+    if (!propertiesFile.exists() && !tmpPropertiesFile.exists()) {
+      // create system.properties
+      if (propertiesFile.createNewFile()) {
+        logger.info(" {} has been created.", propertiesFile.getAbsolutePath());
+      } else {
+        logger.error("can not create {}", propertiesFile.getAbsolutePath());
+        System.exit(-1);
       }
-      else if (!file.exists() && tmpPropertiesFile.exists()) {
-        // rename upgraded system.properties.tmp to system.properties
-        FileUtils.moveFile(tmpPropertiesFile, file);
-        logger.info(" {} has been upgraded.", file.getAbsolutePath());
-        checkProperties();
-        return;
+
+      // write properties to system.properties
+      try (FileOutputStream outputStream = new FileOutputStream(propertiesFile)) {
+        systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+        properties.store(outputStream, SYSTEM_PROPERTIES_STRING);
       }
-    } catch (IOException e) {
-      logger.error("Can not create {}.", file.getAbsolutePath(), e);
-    }
-    
-    // get existed properties from system_properties.txt
-    File inputFile = SystemFileFactory.INSTANCE
-            .getFile(filepath + File.separator + PROPERTIES_FILE_NAME);
-    try (FileInputStream inputStream = new FileInputStream(inputFile.toString())) {
+      return;
+    }
+
+    if (!propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // rename tmp file to system.properties, no need to check
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
+      logger.info("rename {} to {}", tmpPropertiesFile, propertiesFile);
+      return;
+    } else if (propertiesFile.exists() && tmpPropertiesFile.exists()) {
+      // both files exist, remove tmp file
+      FileUtils.forceDeleteOnExit(tmpPropertiesFile);
+      logger.info("remove {}", tmpPropertiesFile);
+    }
+
+    // no tmp file, read properties from system.properties
+    try (FileInputStream inputStream = new FileInputStream(propertiesFile)) {
       properties.load(new InputStreamReader(inputStream, TSFileConfig.STRING_CHARSET));
-      // need to upgrade
-      if (!properties.containsKey("iotdb_version")) {
+      // need to upgrade from 0.9 to 0.10
+      if (!properties.containsKey(IOTDB_VERSION_STRING)) {
         checkUnClosedTsFileV1();
-        upgradeMlog();
-      } else {
-        checkProperties();
-        return;
+        MLogWriter.upgradeMLog(SCHEMA_DIR, MetadataConstant.METADATA_LOG);
+        upgradePropertiesFile();
       }
-    } catch (IOException e) {
-      logger.error("Load system.properties from {} failed.", file.getAbsolutePath(), e);
+      checkProperties();
+    }
+  }
+
+  /**
+   * upgrade 0.9 properties to 0.10 properties
+   */
+  private void upgradePropertiesFile()
+      throws IOException {
+    // create an empty tmpPropertiesFile
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
     }
 
-    // if tmpPropertiesFile exists, remove it
-    if (tmpPropertiesFile.exists()) {
-      try {
-        Files.delete(tmpPropertiesFile.toPath());
-      } catch (IOException e) {
-        logger.error("Fail to remove broken file {}", tmpPropertiesFile);
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      properties.setProperty(PARTITION_INTERVAL_STRING, String.valueOf(partitionInterval));
+      properties.setProperty(TSFILE_FILE_SYSTEM_STRING, tsfileFileSystem);
+      properties.setProperty(IOTDB_VERSION_STRING, iotdbVersion);
+      properties.setProperty(ENABLE_PARTITION_STRING, String.valueOf(enablePartition));
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
+
+      // upgrade finished, delete old system.properties file
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
+      // rename system.properties.tmp to system.properties
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
+  }
+
+
+  /**
+   *  repair 0.10 properties
+   */
+  private void upgradePropertiesFileFromBrokenFile()
+      throws IOException {
     // create an empty tmpPropertiesFile
-    try {
-      if (tmpPropertiesFile.createNewFile()) {
-        logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
-      }
-    } catch (IOException e) {
-      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile, e);
-    }
-    // try to add the storage_group_time_range, tsfile_storage_fs 
-    // and iotdb_version property in system.properties.tmp
-    try (FileOutputStream outputStream = new FileOutputStream(tmpPropertiesFile.toString())) {
-      properties.setProperty("storage_group_time_range", String.valueOf(partitionInterval));
-      properties.setProperty("tsfile_storage_fs", tsfileFileSystem);
-      properties.setProperty("iotdb_version", iotdbVersion);
-      properties.store(outputStream, "System properties:");
-      checkProperties();
+    if (tmpPropertiesFile.createNewFile()) {
+      logger.info("Create system.properties.tmp {}.", tmpPropertiesFile);
+    } else {
+      logger.error("Create system.properties.tmp {} failed.", tmpPropertiesFile);
+      System.exit(-1);
+    }
+
+    try (FileOutputStream tmpFOS = new FileOutputStream(tmpPropertiesFile.toString())) {
+      systemProperties.forEach((k, v) -> properties.setProperty(k, v));
+
+      properties.store(tmpFOS, SYSTEM_PROPERTIES_STRING);
       // upgrade finished, delete old system.properties file
-      if (file.exists()) {
-        Files.delete(file.toPath());
+      if (propertiesFile.exists()) {
+        Files.delete(propertiesFile.toPath());
       }
       // rename system.properties.tmp to system.properties
-      FileUtils.moveFile(tmpPropertiesFile, file);
-    }  catch (IOException e) {
-      logger.error("Something went wrong while upgrading teh system.properties. The file is {}.", file.getAbsolutePath(), e);
+      FileUtils.moveFile(tmpPropertiesFile, propertiesFile);
     }
-
   }
 
-  private void checkProperties() {
-    if (!properties.getProperty("timestamp_precision").equals(timestampPrecision)) {
-      logger.error("Wrong timestamp precision, please set as: " + properties
-              .getProperty("timestamp_precision") + " !");
-      System.exit(-1);
+  private void checkProperties() throws IOException {
+    for (Entry<String, String> entry : systemProperties.entrySet()) {
+      if (!properties.contains(entry.getKey())) {
+        upgradePropertiesFileFromBrokenFile();
+        logger.info("repair system.properties, lack {}", entry.getKey());
+      }
     }
-    if (!(Long.parseLong(properties.getProperty("storage_group_time_range"))
-            == partitionInterval)) {
-      logger.error("Wrong storage group time range, please set as: " + properties
-              .getProperty("storage_group_time_range") + " !");
+
+    if (!properties.getProperty(TIMESTAMP_PRECISION_STRING).equals(timestampPrecision)) {
+      logger.error("Wrong " + TIMESTAMP_PRECISION_STRING + ", please set as: " + properties
+          .getProperty(TIMESTAMP_PRECISION_STRING) + " !");

Review comment:
       fixed




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[GitHub] [incubator-iotdb] samperson1997 commented on a change in pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

samperson1997 commented on a change in pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#discussion_r429553263



##########
File path: server/src/assembly/resources/conf/iotdb-engine.properties
##########
@@ -212,7 +216,7 @@ chunk_buffer_pool_enable=false
 # For example, your partitionInterval is 86400 and you want to insert data in 5 different days,
 # you should set this param >= 5
 # default number is 5

Review comment:
       ```suggestion
   # default number is 1
   ```




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[GitHub] [incubator-iotdb] qiaojialin merged pull request #1248: [IOTDB-697] add enablePartition in config

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qiaojialin merged pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248


   


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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1248: [IOTDB-697] add enablePartition in config

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[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

qiaojialin commented on a change in pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#discussion_r429597172



##########
File path: server/src/assembly/resources/conf/iotdb-engine.properties
##########
@@ -212,7 +216,7 @@ chunk_buffer_pool_enable=false
 # For example, your partitionInterval is 86400 and you want to insert data in 5 different days,
 # you should set this param >= 5
 # default number is 5

Review comment:
       fixed




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[GitHub] [incubator-iotdb] qiaojialin commented on pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

qiaojialin commented on pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#issuecomment-633176010


   > The line 519 in `IoTDBConfig.java` is `private int concurrentWritingTimePartition = 10;`.
   > Shouldn't we change the number to 1?
   
   Yes, fixed


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[GitHub] [incubator-iotdb] sonarcloud[bot] commented on pull request #1248: [IOTDB-697] add enablePartition in config

[GitBox <gi...@apache.org>]

sonarcloud[bot] commented on pull request #1248:
URL: https://github.com/apache/incubator-iotdb/pull/1248#issuecomment-633180369


   Kudos, SonarCloud Quality Gate passed!
   
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