GreptimeDB Export & Import Tools

This guide describes how to use GreptimeDB's Export and Import tools for database backup and restoration.

The Export and Import tools provide functionality for backing up and restoring GreptimeDB databases. These tools can handle both schema and data, allowing for complete or selective backup and restoration operations.

Export Tool

Command Syntax

greptime export [OPTIONS]

Options

Option	Required	Default	Description
--addr	Yes	-	Server address to connect
--output-dir	Yes	-	Directory to store exported data
--database	No	all databasses	Name of the database to export
--export-jobs, -j	No	1	Number of parallel export jobs(multiple databases can be exported in parallel)
--max-retry	No	3	Maximum retry attempts per job
--target, -t	No	all	Export target (schema/data/all)
--start-time	No	-	Start of time range for data export
--end-time	No	-	End of time range for data export
--auth-basic	No	-	Use the <username>:<password> format

Export Targets

• schema: Exports table schemas only (SHOW CREATE TABLE)
• data: Exports table data only (COPY DATABASE TO)
• all: Exports both schemas and data (default)

Output Directory Structure

<output-dir>/
└── greptime/
    └── <database>/
        ├── create_database.sql
        ├── create_tables.sql
        ├── copy_from.sql
        └── <data files>

Import Tool

Command Syntax

greptime import [OPTIONS]

Options

Option	Required	Default	Description
--addr	Yes	-	Server address to connect
--input-dir	Yes	-	Directory containing backup data
--database	No	all databases	Name of the database to import
--import-jobs, -j	No	1	Number of parallel import jobs (multiple databases can be imported in parallel)
--max-retry	No	3	Maximum retry attempts per job
--target, -t	No	all	Import target (schema/data/all)
--auth-basic	No	-	Use the <username>:<password> format

Import Targets

• schema: Imports table schemas only
• data: Imports table data only
• all: Imports both schemas and data (default)

Common Usage Scenarios

Full Databases Backup

# Export all databases backup
greptime export --addr localhost:4000 --output-dir /tmp/backup/greptimedb

# Import all databases
greptime import --addr localhost:4000 --input-dir /tmp/backup/greptimedb

Schema-Only Operations

# Export only schemas
greptime export --addr localhost:4000 --output-dir /tmp/backup/schemas --target schema

# Import only schemas
greptime import --addr localhost:4000 --input-dir /tmp/backup/schemas --target schema

Time-Range Based Backup

# Export data within specific time range
greptime export --addr localhost:4000 \
    --output-dir /tmp/backup/timerange \
    --start-time "2024-01-01 00:00:00" \
    --end-time "2024-01-31 23:59:59"

Specific Database Backup

# To export a specific database
greptime export --addr localhost:4000 --output-dir /tmp/backup/greptimedb --database '{my_database_name}'

# The same applies to import tool
greptime import --addr localhost:4000 --input-dir /tmp/backup/greptimedb --database '{my_database_name}'

Best Practices

1. Parallelism Configuration

   • Adjust --export-jobs/--import-jobs based on available system resources
   • Start with a lower value and increase gradually
   • Monitor system performance during operations

2. Backup Strategy

   • Incremental data backups using time ranges
   • Periodic backups for disaster recovery

3. Error Handling

   • Use --max-retry for handling transient failures
   • Keep logs for troubleshooting

Troubleshooting

Common Issues

1. Connection Errors

   • Verify server address and port
   • Check network connectivity
   • Ensure authentication credentials are correct

2. Permission Issues

   • Verify read/write permissions on output/input directories

3. Resource Constraints

   • Reduce parallel jobs
   • Ensure sufficient disk space
   • Monitor system resources during operations

Performance Tips

1. Export Performance

   • Use time ranges for large datasets
   • Adjust parallel jobs based on CPU/memory
   • Consider network bandwidth limitations

2. Import Performance

   • Monitor database resources