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IoTDB JDBC Sample Program Description Run the IoTDB SQL statement in JDBC connection mode. Sample Code The following code snippet is used as an example. For complete code, see the com.huawei.bigdata.iotdb.JDBCExample class. jdbc url includes the IP address, RPC port number, username
IoTDB Flink Sample Program FlinkIoTDBSink Sample Program FlinkIoTDBSource Sample Program Parent topic: Application IoTDB Development
IoTDB Application Development Rules Set a Proper Number of Storage Groups A proper number of storage groups can improve performance. The system processes I/O requests first in the memory cache and then switch to the stored files or folders if no result is found. In this regard, a
IoTDB Application Development Suggestions Use Write APIs with High Performance Based on Service Requirements The write APIs are ranked as follows in descending order of their performance: insertTablets (inserts multiple tablets, from multiple rows of the same column on multiple devices
Backing Up IoTDB Metadata Scenario To ensure IoTDB metadata security and prevent the IoTDB service from being unavailable due to IoTDB metadata file damages, you need to back up IoTDB metadata. The backup data can be used to recover the system if an exception occurs or the operation
Restoring IoTDB Service Data Scenario IoTDB service data needs to be restored in the following scenarios: Data is modified or deleted unexpectedly and needs to be restored. After an administrator performs major operations (such as upgrade and data adjustment) on IoTDB, an exception
ALM-45585 IoTDB Service Unavailable Alarm Description The system checks the IoTDB service status every 300 seconds. This alarm is generated when the IoTDB service is unavailable. This alarm is cleared when the IoTDB service recovers. Alarm Attributes Alarm ID Alarm Severity Auto Cleared
IoTDB UDF Sample Code and Operations Complete UDF Sample Code For details, see IoTDB UDF Sample Code. Procedure Register a UDF. Register a UDF with a full class name com.huawei.bigdata.iotdb.UDTFExample as follows: Package the project into a JAR. If you use Maven to manage your project
Data Types and Encodings Supported by IoTDB IoTDB supports the following data types and encodings. For details, see Table 1. Table 1 Data types and encodings supported by IoTDB Type Description Supported Encoding BOOLEAN Boolean PLAIN, RLE INT32 Integer PLAIN, RLE, TS_2DIFF, GORILLA
Configuring IoTDB Application Security Authentication Using the keytab File for JDBC Authentication Using the Keytab File for Session Authentication Parent topic: IoTDB Environment Preparations
Backing Up IoTDB Service Data Scenario To ensure IoTDB service data security routinely or before a major operation on IoTDB (such as upgrade or migration), you need to back up IoTDB service data. The backup data can be used to recover the system if an exception occurs or the operation
IoTDB Enhanced Open Source Features Visualization Visualized O&M covers installation, uninstallation, one-click start and stop, configurations, clients, monitoring, alarms, health checks, and logs. Visualized permission management does not require background command line operations
Preparing the Configuration Files for Connecting to the IoTDB Cluster Preparing for User Authentication For an MRS cluster with Kerberos authentication enabled, you need to prepare a user who has the operation permission on related components for program authentication. The following
Commissioning the IoTDB Application in the Local Windows Environment Scenario Run applications in a Windows development environment after application code is developed. If the local and cluster service planes can communicate with each other, you can perform the commissioning on the
Preparing the Configuration Files for Connecting to the IoTDB Cluster Preparing the Configuration Files of the Running Environment During the development or a test run of the program, you need to use cluster configuration files to connect to an MRS cluster. The configuration files
IoTDB Development Guide (Normal Mode) Overview IoTDB Environment Preparations Application Development Application Commissioning More Information
IoTDB Development Guide (Security Mode) IoTDB Application Development Overview IoTDB Development Process IoTDB Environment Preparations Application IoTDB Development IoTDB Application Commissioning IoTDB Java API
