Cluster Management Tool

1. IoTDB-OpsKit

The IoTDB OpsKit is an easy-to-use operation and maintenance tool designed for TimechoDB (Enterprise-grade product based on Apache IoTDB). It helps address the operational and maintenance challenges of multi-node distributed IoTDB deployments by providing functionalities such as cluster deployment, start/stop management, elastic scaling, configuration updates, and data export. With one-click command execution, it simplifies the management of complex database clusters and significantly reduces operational complexity.

This document provides guidance on remotely deploying, configuring, starting, and stopping IoTDB cluster instances using the cluster management tool.

1.1 Prerequisites

The IoTDB OpsKit requires GLIBC 2.17 or later, which means the minimum supported operating system version is CentOS 7. The target machines for IoTDB deployment must have the following dependencies installed:

• JDK 8 or later
• lsof
• netstat
• unzip

If any of these dependencies are missing, please install them manually. The last section of this document provides installation commands for reference.

Note: The IoTDB cluster management tool requires root privileges to execute.

1.2 Deployment

Download and Installation

The IoTDB OpsKit is an auxiliary tool for TimechoDB. Please contact Timecho team to obtain the download instructions.

To install:

1. Navigate to the iotdb-opskit directory and execute:

bash install-iotdbctl.sh

This will activate the iotdbctl command in the current shell session. You can verify the installation by checking the deployment prerequisites:

iotdbctl cluster check example

1. Alternatively, if you prefer not to activate iotdbctl, you can execute commands directly using the absolute path:

<iotdbctl absolute path>/sbin/iotdbctl cluster check example

1.3 Cluster Configuration Files

The cluster configuration files are stored in the iotdbctl/config directory as YAML files.

• Each YAML file name corresponds to a cluster name. Multiple YAML files can coexist.
• A sample configuration file (default_cluster.yaml) is provided in the iotdbctl/config directory to assist users in setting up their configurations.

Structure of YAML Configuration

The YAML file consists of the following five sections:

1. global – General settings, such as SSH credentials, installation paths, and JDK configurations.
2. confignode_servers – Configuration settings for ConfigNodes.
3. datanode_servers – Configuration settings for DataNodes.
4. grafana_server – Configuration settings for Grafana monitoring.
5. prometheus_server – Configuration settings for Prometheus monitoring.

A sample YAML file (default_cluster.yaml) is included in the iotdbctl/config directory.

• You can copy and rename it based on your cluster setup.
• All uncommented fields are mandatory.
• Commented fields are optional.

Example: Checking default_cluster.yaml

To validate a cluster configuration, execute:

iotdbctl cluster check default_cluster

For a complete list of available commands, refer to the command reference section below.

Parameter Reference

Parameter	Description	Mandatory
iotdb_zip_dir	IoTDB distribution directory. If empty, the package will be downloaded from iotdb_download_url.	NO
iotdb_download_url	IoTDB download URL. If iotdb_zip_dir is empty, the package will be retrieved from this address.	NO
jdk_tar_dir	Local path to the JDK package for uploading and deployment.	NO
jdk_deploy_dir	Remote deployment directory for the JDK.	NO
jdk_dir_name	JDK decompression directory name. Default: jdk_iotdb.	NO
iotdb_lib_dir	IoTDB library directory (or .zip package for upgrades). Default: commented out.	NO
user	SSH login username for deployment.	YES
password	SSH password (if omitted, key-based authentication will be used).	NO
pkey	SSH private key (used if password is not provided).	NO
ssh_port	SSH port number.	YES
deploy_dir	IoTDB deployment directory.	YES
iotdb_dir_name	IoTDB decompression directory name. Default: iotdb.	NO
datanode-env.sh	Corresponds to iotdb/config/datanode-env.sh. If both global and confignode_servers are configured, confignode_servers takes precedence.	NO
confignode-env.sh	Corresponds to iotdb/config/confignode-env.sh. If both global and datanode_servers are configured, datanode_servers takes precedence.	NO
iotdb-system.properties	Corresponds to <iotdb_path>/config/iotdb-system.properties.	NO
cn_internal_address	The inter-node communication address for ConfigNodes. This parameter defines the address of the surviving ConfigNode, which defaults to confignode_x. If both global and confignode_servers are configured, the value in confignode_servers takes precedence. Corresponds to cn_internal_address in iotdb/config/iotdb-system.properties.	YES
dn_internal_address	The inter-node communication address for DataNodes. This address defaults to confignode_x. If both global and datanode_servers are configured, the value in datanode_servers takes precedence. Corresponds to dn_internal_address in iotdb/config/iotdb-system.properties.	YES

Both datanode-env.sh and confignode-env.sh allow extra parameters to be appended. These parameters can be configured using the extra_opts field. Example from default_cluster.yaml:

datanode-env.sh:   
  extra_opts: |
    IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:+UseG1GC"
    IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:MaxGCPauseMillis=200"

ConfigNode Configuration

ConfigNodes can be configured in confignode_servers. Multiple ConfigNodes can be deployed, with the first started ConfigNode (node1) serving as the Seed ConfigNode by default.

Parameter	Description	Mandatory
name	ConfigNode name.	YES
deploy_dir	ConfigNode deployment directory.	YES
cn_internal_address	Inter-node communication address for ConfigNodes, corresponding to iotdb/config/iotdb-system.properties.	YES
cn_seed_config_node	The cluster configuration address points to the surviving ConfigNode. This address defaults to confignode_x. If both global and confignode_servers are configured, the value in confignode_servers takes precedence, corresponding to cn_internal_address in iotdb/config/iotdb-system.properties	YES
cn_internal_port	Internal communication port, corresponding to cn_internal_port in iotdb/config/iotdb-system.properties.	YES
cn_consensus_port	Consensus communication port, corresponding to cn_consensus_port in iotdb/config/iotdb-system.properties.	NO
cn_data_dir	Data directory for ConfigNodes, corresponding to cn_data_dir in iotdb/config/iotdb-system.properties.	YES
iotdb-system.properties	ConfigNode properties file. If global and confignode_servers are both configured, values from confignode_servers take precedence.	NO

DataNode Configuration

Datanodes can be configured in datanode_servers. Multiple DataNodes can be deployed, each requiring unique configuration.

Parameter	Description	Mandatory
name	DataNode name.	YES
deploy_dir	DataNode deployment directory.	YES
dn_rpc_address	RPC communication address, corresponding to dn_rpc_address in iotdb/config/iotdb-system.properties.	YES
dn_internal_address	Internal communication address, corresponding to dn_internal_address in iotdb/config/iotdb-system.properties.	YES
dn_seed_config_node	Points to the active ConfigNode. Defaults to confignode_x. If global and datanode_servers are both configured, values from datanode_servers take precedence. Corresponds to dn_seed_config_node in iotdb/config/iotdb-system.properties.	YES
dn_rpc_port	RPC port for DataNodes, corresponding to dn_rpc_port in iotdb/config/iotdb-system.properties.	YES
dn_internal_port	Internal communication port, corresponding to dn_internal_port in iotdb/config/iotdb-system.properties.	YES
iotdb-system.properties	DataNode properties file. If global and datanode_servers are both configured, values from datanode_servers take precedence.	NO

Grafana Configuration

Grafana can be configured in grafana_server. Defines the settings for deploying Grafana as a monitoring solution for IoTDB.

Parameter	Description	Mandatory
grafana_dir_name	Name of the Grafana decompression directory. Default: grafana_iotdb.	NO
host	The IP address of the machine hosting Grafana.	YES
grafana_port	The port Grafana listens on. Default: 3000.	NO
deploy_dir	Deployment directory for Grafana.	YES
grafana_tar_dir	Path to the Grafana compressed package.	YES
dashboards	Path to pre-configured Grafana dashboards.	NO

Prometheus Configuration

Grafana can be configured in prometheus_server. Defines the settings for deploying Prometheus as a monitoring solution for IoTDB.

Parameter	Description	Mandatory
prometheus_dir_name	Name of the Prometheus decompression directory. Default: prometheus_iotdb.	NO
host	The IP address of the machine hosting Prometheus.	YES
prometheus_port	The port Prometheus listens on. Default: 9090.	NO
deploy_dir	Deployment directory for Prometheus.	YES
prometheus_tar_dir	Path to the Prometheus compressed package.	YES
storage_tsdb_retention_time	Number of days data is retained. Default: 15 days.	NO
storage_tsdb_retention_size	Maximum data storage size per block. Default: 512M. Units: KB, MB, GB, TB, PB, EB.	NO

If metrics are enabled in iotdb-system.properties (in config/xxx.yaml), the configurations will be automatically applied to Prometheus without manual modification.

Special Configuration Notes

• Handling Special Characters in YAML Keys: If a YAML key value contains special characters (such as :), it is recommended to enclose the entire value in double quotes ("").
• Avoid Spaces in File Paths: Paths containing spaces may cause parsing errors in some configurations.

1.4 Usage Scenarios

Data Cleanup

This operation deletes cluster data directories, including:

• IoTDB data directories,
• ConfigNode directories (cn_system_dir, cn_consensus_dir),
• DataNode directories (dn_data_dirs, dn_consensus_dir, dn_system_dir),
• Log directories and ext directories specified in the YAML configuration.

To clean cluster data, perform the following steps:

# Step 1: Stop the cluster
iotdbctl cluster stop default_cluster

# Step 2: Clean the cluster data
iotdbctl cluster clean default_cluster

Cluster Destruction

The cluster destruction process completely removes the following resources:

• Data directories,
• ConfigNode directories (cn_system_dir, cn_consensus_dir),
• DataNode directories (dn_data_dirs, dn_consensus_dir, dn_system_dir),
• Log and ext directories,
• IoTDB deployment directory,
• Grafana and Prometheus deployment directories.

To destroy a cluster, follow these steps:

# Step 1: Stop the cluster
iotdbctl cluster stop default_cluster

# Step 2: Destroy the cluster
iotdbctl cluster destroy default_cluster

Cluster Upgrade

To upgrade the cluster, follow these steps:

1. In config/xxx.yaml, set iotdb_lib_dir to the path of the JAR files to be uploaded. Example: iotdb/lib
2. If uploading a compressed package, compress the iotdb/lib directory:

zip -r lib.zip apache-iotdb-1.2.0/lib/*

1. Execute the following commands to distribute the library and restart the cluster:

iotdbctl cluster dist-lib default_cluster
iotdbctl cluster restart default_cluster

Hot Deployment

Hot deployment allows real-time configuration updates without restarting the cluster.

Steps:

1. Modify the configuration in config/xxx.yaml.
2. Distribute the updated configuration and reload it:

iotdbctl cluster dist-conf default_cluster
iotdbctl cluster reload default_cluster

Cluster Expansion

To expand the cluster by adding new nodes:

1. Add a new DataNode or ConfigNode in config/xxx.yaml.
2. Execute the cluster expansion command:

iotdbctl cluster scaleout default_cluster

Cluster Shrinking

To remove a node from the cluster:

1. Identify the node name or IP:port in config/xxx.yaml:
   1. ConfigNode port: cn_internal_port
   2. DataNode port: rpc_port
2. Execute the following command:

iotdbctl cluster scalein default_cluster

Managing Existing IoTDB Clusters

To manage an existing IoTDB cluster with the OpsKit tool:

1. Configure SSH credentials:
   1. Set user, password (or pkey), and ssh_port in config/xxx.yaml.
2. Modify IoTDB deployment paths: For example, if IoTDB is deployed at /home/data/apache-iotdb-1.1.1:

deploy_dir: /home/data/
iotdb_dir_name: apache-iotdb-1.1.1

1. Configure JDK paths: If JAVA_HOME is not used, set the JDK deployment path:

jdk_deploy_dir: /home/data/
jdk_dir_name: jdk_1.8.2

1. Set cluster addresses:

• cn_internal_address and dn_internal_address
• In confignode_servers → iotdb-system.properties, configure:
  • cn_internal_address, cn_internal_port, cn_consensus_port, cn_system_dir, cn_consensus_dir
• In datanode_servers → iotdb-system.properties, configure:
  • dn_rpc_address, dn_internal_address, dn_data_dirs, dn_consensus_dir, dn_system_dir

1. Execute the initialization command:

iotdbctl cluster init default_cluster

Deploying IoTDB, Grafana, and Prometheus

To deploy an IoTDB cluster along with Grafana and Prometheus:

1. Enable metrics: In iotdb-system.properties, enable the metrics interface.
2. Configure Grafana:

• If deploying multiple dashboards, separate names with commas.
• Ensure dashboard names are unique to prevent overwriting.

1. Configure Prometheus:

• If the IoTDB cluster has metrics enabled, Prometheus automatically adapts without manual configuration.

1. Start the cluster:

iotdbctl cluster start default_cluster

For detailed parameters, refer to the Cluster Configuration Files section above.

1.5 Command Reference

The basic command structure is:

iotdbctl cluster <key> <cluster name> [params (Optional)]

• key – The specific command to execute.
• cluster_name – The name of the cluster (matches the YAML file name in iotdbctl/config).
• params – Optional parameters for the command.

Example: Deploying the default_cluster cluster

iotdbctl cluster deploy default_cluster

Command Overview

ommand	escription	Parameters
check	Check cluster readiness for deployment.	Cluster name
clean	Clean up cluster data.	Cluster name
deploy/dist-all	Deploy the cluster.	Cluster name, -N module (optional: iotdb, grafana, prometheus), -op force (optional)
list	List cluster status.	None
start	Start the cluster.	Cluster name, -N node name (optional: iotdb, grafana, prometheus)
stop	Stop the cluster.	Cluster name, -N node name (optional), -op force (optional)
restart	Restart the cluster.	Cluster name, -N node name (optional), -op force (optional)
show	View cluster details.	Cluster name, details (optional)
destroy	Destroy the cluster.	Cluster name, -N module (optional: iotdb, grafana, prometheus)
scaleout	Expand the cluster.	Cluster name
scalein	Shrink the cluster.	Cluster name, -N node name or IP:port
reload	Hot reload cluster configuration.	Cluster name
dist-conf	Distribute cluster configuration.	Cluster name
dumplog	Backup cluster logs.	Cluster name, -N node name, -h target IP, -pw target password, -p target port, -path backup path, -startdate, -enddate, -loglevel, -l transfer speed
dumpdata	Backup cluster data	Cluster name, -h target IP, -pw target password, -p target port, -path backup path, -startdate, -enddate, -l transfer speed
dist-lib	Upgrade the IoTDB lib package.	Cluster name
init	Initialize the cluster configuration.	Cluster name
status	View process status.	Cluster name
activate	Activate the cluster.	Cluster name
health_check	Perform a health check.	Cluster name, -N, nodename (optional)
backup	Backup the cluster.	Cluster name,-N nodename (optional)
importschema	Import metadata.	Cluster name,-N nodename -param paramters
exportschema	Export metadata.	Cluster name,-N nodename -param paramters

1.6 Detailed Command Execution Process

The following examples use default_cluster.yaml as a reference. Users can modify the commands according to their specific cluster configuration files.

Check Cluster Deployment Environment

The following command checks whether the cluster environment meets the deployment requirements:

iotdbctl cluster check default_cluster

Execution Steps:

1. Locate the corresponding YAML file (default_cluster.yaml) based on the cluster name.
2. Retrieve configuration information for ConfigNode and DataNode (confignode_servers and datanode_servers).
3. Verify the following conditions on the target node:
   1. SSH connectivity
   2. JDK version (must be 1.8 or above)
   3. Required system tools: unzip, lsof, netstat

Expected Output:

• If successful: Info: example check successfully!
• If failed: Error: example check fail!

Troubleshooting Tips:

• JDK version not satisfied: Specify a valid jdk1.8+ path in the YAML file for deployment.
• Missing system tools: Install unzip, lsof, and netstat on the server.
• Port conflict: Check the error log, e.g., Error: Server (ip:172.20.31.76) iotdb port (10713) is listening.

Deploy Cluster

Deploy the entire cluster using the following command:

iotdbctl cluster deploy default_cluster

Execution Steps:

1. Locate the corresponding YAML file based on the cluster name.
2. Upload the IoTDB and JDK compressed packages (if jdk_tar_dir and jdk_deploy_dir are configured).
3. Generate and upload the iotdb-system.properties file based on the YAML configuration.

Force Deployment: To overwrite existing deployment directories and redeploy:

iotdbctl cluster deploy default_cluster -op force

Deploying Individual Modules:

You can deploy specific components individually:

# Deploy Grafana module
iotdbctl cluster deploy default_cluster -N grafana

# Deploy Prometheus module
iotdbctl cluster deploy default_cluster -N prometheus

# Deploy IoTDB module
iotdbctl cluster deploy default_cluster -N iotdb

Start Cluster

Start the cluster using the following command:

iotdbctl cluster start default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Start ConfigNodes sequentially according to the YAML order.
   1. The first ConfigNode is treated as the Seed ConfigNode.
   2. Verify startup by checking process IDs.
3. Start DataNodes sequentially and verify their process IDs.
4. After process verification, check the cluster's service health via CLI.
   1. If the CLI connection fails, retry every 10 seconds, up to 5 times.

Start a Single Node: Start specific nodes by name or IP:

# By node name
iotdbctl cluster start default_cluster -N datanode_1

# By IP and port (ConfigNode uses `cn_internal_port`, DataNode uses `rpc_port`)
iotdbctl cluster start default_cluster -N 192.168.1.5:6667

# Start Grafana
iotdbctl cluster start default_cluster -N grafana

# Start Prometheus
iotdbctl cluster start default_cluster -N prometheus

Note: The iotdbctl tool relies on start-confignode.sh and start-datanode.sh scripts. If startup fails, check the cluster status using the following command:

iotdbctl cluster status default_cluster

View Cluster Status

To view the current cluster status:

iotdbctl cluster show default_cluster

To view detailed information:

iotdbctl cluster show default_cluster details

Execution Steps:

1. Locate the YAML file and retrieve confignode_servers and datanode_servers configuration.
2. Execute show cluster details via CLI.
3. If one node returns successfully, the process skips checking remaining nodes.

Stop Cluster

To stop the entire cluster:

iotdbctl cluster stop default_cluster

Execution Steps:

1. Locate the YAML file and retrieve confignode_servers and datanode_servers configuration.
2. Stop DataNodes sequentially based on the YAML configuration.
3. Stop ConfigNodes in sequence.

Force Stop: To forcibly stop the cluster using kill -9:

iotdbctl cluster stop default_cluster -op force

Stop a Single Node: Stop nodes by name or IP:

# By node name
iotdbctl cluster stop default_cluster -N datanode_1

# By IP and port
iotdbctl cluster stop default_cluster -N 192.168.1.5:6667

# Stop Grafana
iotdbctl cluster stop default_cluster -N grafana

# Stop Prometheus
iotdbctl cluster stop default_cluster -N prometheus

Note: If the IoTDB cluster is not fully stopped, verify its status using:

iotdbctl cluster status default_cluster

Clean Cluster Data

To clean up cluster data, execute:

iotdbctl cluster clean default_cluster

Execution Steps:

1. Locate the YAML file and retrieve confignode_servers and datanode_servers configuration.
2. Verify that no services are running. If any are active, the cleanup will not proceed.
3. Delete the following directories:
   1. IoTDB data directories,
   2. ConfigNode and DataNode system directories (cn_system_dir, dn_system_dir),
   3. Consensus directories (cn_consensus_dir, dn_consensus_dir),
   4. Logs and ext directories.

Restart Cluster

Restart the cluster using the following command:

iotdbctl cluster restart default_cluster

Execution Steps:

1. Locate the YAML file and retrieve configurations for ConfigNodes, DataNodes, Grafana, and Prometheus.
2. Perform a cluster stop followed by a cluster start.

Force Restart: To forcibly restart the cluster:

iotdbctl cluster restart default_cluster -op force

Restart a Single Node: Restart specific nodes by name:

# Restart DataNode
iotdbctl cluster restart default_cluster -N datanode_1

# Restart ConfigNode
iotdbctl cluster restart default_cluster -N confignode_1

# Restart Grafana
iotdbctl cluster restart default_cluster -N grafana

# Restart Prometheus
iotdbctl cluster restart default_cluster -N prometheus

Cluster Expansion

To add a node to the cluster:

1. Edit config/xxx.yaml to add a new DataNode or ConfigNode.
2. Execute the following command:

iotdbctl cluster scaleout default_cluster

Execution Steps:

1. Locate the YAML file and retrieve node configuration.
2. Upload the IoTDB and JDK packages (if jdk_tar_dir and jdk_deploy_dir are configured).
3. Generate and upload iotdb-system.properties.
4. Start the new node and verify success.

Tip: Only one node expansion is supported per execution.

Cluster Shrinking

To remove a node from the cluster:

1. Identify the node name or IP:port in config/xxx.yaml.
2. Execute the following command:

#Scale down by node name
iotdbctl cluster scalein default_cluster -N nodename

#Scale down according to ip+port (ip+port obtains the only node according to ip+dn_rpc_port in datanode, and obtains the only node according to ip+cn_internal_port in confignode)
iotdbctl cluster scalein default_cluster -N ip:port

Execution Steps:

1. Locate the YAML file and retrieve node configuration.
2. Ensure at least one ConfigNode and one DataNode remain.
3. Identify the node to remove, execute the scale-in command, and delete the node directory.

Tip: Only one node shrinking is supported per execution.

Destroy Cluster

To destroy the entire cluster:

iotdbctl cluster destroy default_cluster

Execution Steps:

1. Locate the YAML file and retrieve node information.
2. Verify that all nodes are stopped. If any node is running, the destruction will not proceed.
3. Delete the following directories:
   1. IoTDB data directories,
   2. ConfigNode and DataNode system directories,
   3. Consensus directories,
   4. Logs, ext, and deployment directories,
   5. Grafana and Prometheus directories.

Destroy a Single Module: To destroy individual modules:

# Destroy Grafana
iotdbctl cluster destroy default_cluster -N grafana

# Destroy Prometheus
iotdbctl cluster destroy default_cluster -N prometheus

# Destroy IoTDB
iotdbctl cluster destroy default_cluster -N iotdb

Distribute Cluster Configuration

To distribute the cluster configuration files across nodes:

iotdbctl cluster dist-conf default_cluster

Execution Steps:

1. Locate the YAML file based on cluster-name.
2. Retrieve configuration from confignode_servers, datanode_servers, grafana, and prometheus.
3. Generate and upload iotdb-system.properties to the specified nodes.

Hot Load Cluster Configuration

To reload the cluster configuration without restarting:

iotdbctl cluster reload default_cluster

Execution Steps:

1. Locate the YAML file based on cluster-name.
2. Execute the load configuration command through the CLI for each node.

Cluster Node Log Backup

To back up logs from specific nodes:

iotdbctl cluster dumplog default_cluster -N datanode_1,confignode_1  -startdate '2023-04-11' -enddate '2023-04-26' -h 192.168.9.48 -p 36000 -u root -pw root -path '/iotdb/logs' -logs '/root/data/db/iotdb/logs'

Execution Steps:

1. Locate the YAML file based on cluster-name.
2. Verify node existence (datanode_1 and confignode_1).
3. Back up log data within the specified date range.
4. Save logs to /iotdb/logs or the default IoTDB installation path.

Command	Description	Mandatory
-h	IP address of the backup server	NO
-u	Username for the backup server	NO
-pw	Password for the backup server	NO
-p	Backup server port (Default: 22)	NO
-path	Path for backup data (Default: current path)	NO
-loglevel	Log level (all, info, error, warn. Default: all)	NO
-l	Speed limit (Default: unlimited; Range: 0 to 104857601 Kbit/s)	NO
-N	Cluster names (comma-separated)	YES
-startdate	Start date (inclusive; Default: 1970-01-01)	NO
-enddate	End date (inclusive)	NO
-logs	IoTDB log storage path (Default: {iotdb}/logs)	NO

Cluster Data Backup

To back up data from the cluster:

iotdbctl cluster dumpdata default_cluster -granularity partition  -startdate '2023-04-11' -enddate '2023-04-26' -h 192.168.9.48 -p 36000 -u root -pw root -path '/iotdb/datas'

This command identifies the leader node from the YAML file and backs up data within the specified date range to the /iotdb/datas directory on the 192.168.9.48 server.

Command	Description	Mandatory
-h	IP address of the backup server	NO
-u	Username for the backup server	NO
-pw	Password for the backup server	NO
-p	Backup server port (Default: 22)	NO
-path	Path for storing backup data (Default: current path)	NO
-granularity	Data partition granularity	YES
-l	Speed limit (Default: unlimited; Range: 0 to 104857601 Kbit/s)	NO
-startdate	Start date (inclusive)	YES
-enddate	End date (inclusive)	YES

Cluster Upgrade

To upgrade the cluster:

iotdbctl cluster dist-lib default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve the configuration of confignode_servers and datanode_servers.
3. Upload the library package.

Note: After the upgrade, restart all IoTDB nodes for the changes to take effect.

Cluster Initialization

To initialize the cluster:

iotdbctl cluster init default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve configuration details for confignode_servers, datanode_servers, Grafana, and Prometheus.
3. Initialize the cluster configuration.

View Cluster Process

To check the cluster process status:

iotdbctl cluster status default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve configuration details for confignode_servers, datanode_servers, Grafana, and Prometheus.
3. Display the operational status of each node in the cluster.

Cluster Authorization Activation

Default Activation Method: To activate the cluster using an activation code:

iotdbctl cluster activate default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve the confignode_servers configuration.
3. Obtain the machine code.
4. Enter the activation code when prompted.

Example:

Machine code:
Kt8NfGP73FbM8g4Vty+V9qU5lgLvwqHEF3KbLN/SGWYCJ61eFRKtqy7RS/jw03lHXt4MwdidrZJ==
JHQpXu97IKwv3rzbaDwoPLUuzNCm5aEeC9ZEBW8ndKgGXEGzMms25+u==
Please enter the activation code:
JHQpXu97IKwv3rzbaDwoPLUuzNCm5aEeC9ZEBW8ndKg=, lTF1Dur1AElXIi/5jPV9h0XCm8ziPd9/R+tMYLsze1oAPxE87+Nwws=
Activation successful.

Activate a Specific Node: To activate a specific node:

iotdbctl cluster activate default_cluster -N confignode1

Activate via License Path: To activate using a license file:

iotdbctl cluster activate default_cluster -op license_path

Cluster Health Check

To perform a cluster health check:

iotdbctl cluster health_check default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve configuration details for confignode_servers and datanode_servers.
3. Execute health_check.sh on each node.

Single Node Health Check: To check a specific node:

iotdbctl cluster health_check default_cluster -N datanode_1

Cluster Shutdown Backup

To back up the cluster during shutdown:

iotdbctl cluster backup default_cluster

Execution Steps:

1. Locate the YAML file based on the cluster name.
2. Retrieve configuration details for confignode_servers and datanode_servers.
3. Execute backup.sh on each node.

Single Node Backup: To back up a specific node:

iotdbctl cluster backup default_cluster -N datanode_1

Note: Multi-node deployment on a single machine only supports quick mode.

Cluster Metadata Import

To import metadata:

iotdbctl cluster importschema default_cluster -N datanode1 -param "-s ./dump0.csv -fd ./failed/ -lpf 10000"

Execution Steps:

1. Locate the YAML file based on the cluster name to retrieve datanode_servers configuration information.
2. Execute metadata import using import-schema.sh on datanode1.

Parameter Descriptions for -param:

Command	Description	Mandatory
-s	Specify the data file or directory to be imported. If a directory is specified, all files with a .csv extension will be imported in bulk.	YES
-fd	Specify a directory to store failed import files. If omitted, failed files will be saved in the source directory with the .failed suffix added to the original filename.	No
-lpf	Specify the maximum number of lines per failed import file (Default: 10,000).	NO

Cluster Metadata Export

To export metadata:

iotdbctl cluster exportschema default_cluster -N datanode1 -param "-t ./ -pf ./pattern.txt -lpf 10 -t 10000"

Execution Steps:

1. Locate the YAML file based on the cluster name to retrieve datanode_servers configuration information.
2. Execute metadata export using export-schema.sh on datanode1.

Parameter Descriptions for -param:

Command	Description	Mandatory
-t	Specify the output path for the exported CSV file.	YES
-path	Specify the metadata path pattern for export. If this parameter is specified, the -s parameter will be ignored. Example: root.stock.**.	NO
-pf	If -path is not specified, use this parameter to specify the file containing metadata paths to export. The file must be in .txt format, with one path per line.	NO
-lpf	Specify the maximum number of lines per exported file (Default: 10,000).	NO
-timeout	Specify the session query timeout in milliseconds.	NO

1.7 Introduction to Cluster Deployment Tool Samples

In the cluster deployment tool installation directory (config/example), there are three YAML configuration examples. If needed, you can copy and modify them for your deployment.

Name	Description
default_1c1d.yaml	Example configuration for 1 ConfigNode and 1 DataNode.
default_3c3d.yaml	Example configuration for 3 ConfigNodes and 3 DataNodes.
default_3c3d_grafa_prome	Example configuration for 3 ConfigNodes, 3 DataNodes, Grafana, and Prometheus.

2. IoTDB Data Directory Overview Tool

The IoTDB Data Directory Overview Tool provides an overview of the IoTDB data directory structure. It is located at tools/tsfile/print-iotdb-data-dir.

2.1 Usage

• For Windows:

.\print-iotdb-data-dir.bat <IoTDB data folder path, separated by commas if there are multiple folders> (<storage path of the output overview file>)

• For Linux or MacOs:

./print-iotdb-data-dir.sh <IoTDB data folder path, separated by commas if there are multiple folders> (<storage path of the output overview file>)

Note: If the output path is not specified, the default relative path IoTDB_data_dir_overview.txt will be used.

2.2 Example

Use Windows in this example:

.\print-iotdb-data-dir.bat D:\github\master\iotdb\data\datanode\data
````````````````````````
Starting Printing the IoTDB Data Directory Overview
````````````````````````
output save path:IoTDB_data_dir_overview.txt
data dir num:1
143  [main] WARN  o.a.i.t.c.conf.TSFileDescriptor - not found iotdb-system.properties, use the default configs.
|==============================================================
|D:\github\master\iotdb\data\datanode\data
|--sequence
|  |--root.redirect0
|  |  |--1
|  |  |  |--0
|  |--root.redirect1
|  |  |--2
|  |  |  |--0
|  |--root.redirect2
|  |  |--3
|  |  |  |--0
|  |--root.redirect3
|  |  |--4
|  |  |  |--0
|  |--root.redirect4
|  |  |--5
|  |  |  |--0
|  |--root.redirect5
|  |  |--6
|  |  |  |--0
|  |--root.sg1
|  |  |--0
|  |  |  |--0
|  |  |  |--2760
|--unsequence
|==============================================================

3. TsFile Sketch Tool

The TsFile Sketch Tool provides a summarized view of the content within a TsFile. It is located at tools/tsfile/print-tsfile.

3.1 Usage

• For Windows:

.\print-tsfile-sketch.bat <TsFile path> (<storage path of the output sketch file>)

• For Linux or MacOs:

./print-tsfile-sketch.sh <TsFile path> (<storage path of the output sketch file>)

Note: If the output path is not specified, the default relative path TsFile_sketch_view.txt will be used.

3.2 Example

Use Windows in this example:

.\print-tsfile.bat D:\github\master\1669359533965-1-0-0.tsfile D:\github\master\sketch.txt
````````````````````````
Starting Printing the TsFile Sketch
````````````````````````
TsFile path:D:\github\master\1669359533965-1-0-0.tsfile
Sketch save path:D:\github\master\sketch.txt
148  [main] WARN  o.a.i.t.c.conf.TSFileDescriptor - not found iotdb-system.properties, use the default configs.
-------------------------------- TsFile Sketch --------------------------------
file path: D:\github\master\1669359533965-1-0-0.tsfile
file length: 2974

            POSITION|   CONTENT
            --------    -------
                   0|   [magic head] TsFile
                   6|   [version number] 3
||||||||||||||||||||| [Chunk Group] of root.sg1.d1, num of Chunks:3
                   7|   [Chunk Group Header]
                    |           [marker] 0
                    |           [deviceID] root.sg1.d1
                  20|   [Chunk] of root.sg1.d1.s1, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-9032452783138882770,maxValue:9117677033041335123,firstValue:7068645577795875906,lastValue:-5833792328174747265,sumValue:5.795959009889246E19]
                    |           [chunk header] marker=5, measurementID=s1, dataSize=864, dataType=INT64, compressionType=SNAPPY, encodingType=RLE
                    |           [page]  UncompressedSize:862, CompressedSize:860
                 893|   [Chunk] of root.sg1.d1.s2, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-8806861312244965718,maxValue:9192550740609853234,firstValue:1150295375739457693,lastValue:-2839553973758938646,sumValue:8.2822564314572677E18]
                    |           [chunk header] marker=5, measurementID=s2, dataSize=864, dataType=INT64, compressionType=SNAPPY, encodingType=RLE
                    |           [page]  UncompressedSize:862, CompressedSize:860
                1766|   [Chunk] of root.sg1.d1.s3, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-9076669333460323191,maxValue:9175278522960949594,firstValue:2537897870994797700,lastValue:7194625271253769397,sumValue:-2.126008424849926E19]
                    |           [chunk header] marker=5, measurementID=s3, dataSize=864, dataType=INT64, compressionType=SNAPPY, encodingType=RLE
                    |           [page]  UncompressedSize:862, CompressedSize:860
||||||||||||||||||||| [Chunk Group] of root.sg1.d1 ends
                2656|   [marker] 2
                2657|   [TimeseriesIndex] of root.sg1.d1.s1, tsDataType:INT64, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-9032452783138882770,maxValue:9117677033041335123,firstValue:7068645577795875906,lastValue:-5833792328174747265,sumValue:5.795959009889246E19]
                    |           [ChunkIndex] offset=20
                2728|   [TimeseriesIndex] of root.sg1.d1.s2, tsDataType:INT64, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-8806861312244965718,maxValue:9192550740609853234,firstValue:1150295375739457693,lastValue:-2839553973758938646,sumValue:8.2822564314572677E18]
                    |           [ChunkIndex] offset=893
                2799|   [TimeseriesIndex] of root.sg1.d1.s3, tsDataType:INT64, startTime: 1669359533948 endTime: 1669359534047 count: 100 [minValue:-9076669333460323191,maxValue:9175278522960949594,firstValue:2537897870994797700,lastValue:7194625271253769397,sumValue:-2.126008424849926E19]
                    |           [ChunkIndex] offset=1766
                2870|   [IndexOfTimerseriesIndex Node] type=LEAF_MEASUREMENT
                    |           <s1, 2657>
                    |           <endOffset, 2870>
||||||||||||||||||||| [TsFileMetadata] begins
                2891|   [IndexOfTimerseriesIndex Node] type=LEAF_DEVICE
                    |           <root.sg1.d1, 2870>
                    |           <endOffset, 2891>
                    |   [meta offset] 2656
                    |   [bloom filter] bit vector byte array length=31, filterSize=256, hashFunctionSize=5
||||||||||||||||||||| [TsFileMetadata] ends
                2964|   [TsFileMetadataSize] 73
                2968|   [magic tail] TsFile
                2974|   END of TsFile
---------------------------- IndexOfTimerseriesIndex Tree -----------------------------
        [MetadataIndex:LEAF_DEVICE]
        └──────[root.sg1.d1,2870]
                        [MetadataIndex:LEAF_MEASUREMENT]
                        └──────[s1,2657]
---------------------------------- TsFile Sketch End ----------------------------------

Explanations:

• The output is separated by the | symbol. The left side indicates the actual position within the TsFile, while the right side provides a summary of the content.
• The "||||||||||||||||||||" lines are added for readability and are not part of the actual TsFile data.
• The final "IndexOfTimerseriesIndex Tree" section reorganizes the metadata index tree at the end of the TsFile. This view aids understanding but does not represent actual stored data.

4. TsFile Resource Sketch Tool

The TsFile Resource Sketch Tool displays details about TsFile resource files. It is located at tools/tsfile/print-tsfile-resource-files.

4.1 Usage

• For Windows:

.\print-tsfile-resource-files.bat <path of the parent directory of the TsFile resource files, or path of a TsFile resource file>

• For Linux or MacOs:

./print-tsfile-resource-files.sh <path of the parent directory of the TsFile resource files, or path of a TsFile resource file>

4.2 Example

Use Windows in this example:

.\print-tsfile-resource-files.bat D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0
````````````````````````
Starting Printing the TsFileResources
````````````````````````
147  [main] WARN  o.a.i.t.c.conf.TSFileDescriptor - not found iotdb-system.properties, use the default configs.
230  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Cannot find IOTDB_HOME or IOTDB_CONF environment variable when loading config file iotdb-system.properties, use default configuration
231  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Couldn't load the configuration iotdb-system.properties from any of the known sources.
233  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Cannot find IOTDB_HOME or IOTDB_CONF environment variable when loading config file iotdb-system.properties, use default configuration
237  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Couldn't load the configuration iotdb-system.properties from any of the known sources.
Analyzing D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0\1669359533489-1-0-0.tsfile ...

Resource plan index range [9223372036854775807, -9223372036854775808]
device root.sg1.d1, start time 0 (1970-01-01T08:00+08:00[GMT+08:00]), end time 99 (1970-01-01T08:00:00.099+08:00[GMT+08:00])

Analyzing the resource file folder D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0 finished.
.\print-tsfile-resource-files.bat D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0\1669359533489-1-0-0.tsfile.resource
````````````````````````
Starting Printing the TsFileResources
````````````````````````
178  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Cannot find IOTDB_HOME or IOTDB_CONF environment variable when loading config file iotdb-system.properties, use default configuration
186  [main] WARN  o.a.i.t.c.conf.TSFileDescriptor - not found iotdb-system.properties, use the default configs.
187  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Couldn't load the configuration iotdb-system.properties from any of the known sources.
188  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Cannot find IOTDB_HOME or IOTDB_CONF environment variable when loading config file iotdb-system.properties, use default configuration
192  [main] WARN  o.a.iotdb.db.conf.IoTDBDescriptor - Couldn't load the configuration iotdb-system.properties from any of the known sources.
Analyzing D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0\1669359533489-1-0-0.tsfile ...

Resource plan index range [9223372036854775807, -9223372036854775808]
device root.sg1.d1, start time 0 (1970-01-01T08:00+08:00[GMT+08:00]), end time 99 (1970-01-01T08:00:00.099+08:00[GMT+08:00])

Analyzing the resource file D:\github\master\iotdb\data\datanode\data\sequence\root.sg1\0\0\1669359533489-1-0-0.tsfile.resource finished.