TiDB provides multiple data migration tools for different scenarios such as full data migration, incremental data migration, backup and restore, and data replication.
This document introduces the user scenarios, advantages, and limitations of these tools. You can choose the right tool according to your needs.
The following table introduces the user scenarios, the supported upstreams and downstreams of migration tools.
|Tool name||User scenario||Upstream (or the imported source file)||Downstream (or the output file)||Advantages||Limitation|
|TiDB Data Migration (DM)||Data migration from MySQL-compatible databases to TiDB||MySQL, MariaDB, Aurora, MySQL||TiDB||Data import speed is roughly the same as that of TiDB Lighting's TiDB-backend, and much lower than that of TiDB Lighting's Local-backend. So it is recommended to use DM to migrate full data with a size of less than 1 TiB.|
|Dumpling||Full data export from MySQL or TiDB||MySQL, TiDB||SQL, CSV|
|TiDB Lightning||Full data import into TiDB||TiDB|
|Backup & Restore (BR)||Migrate a large amount of TiDB custer data by backing up and restoring data.||TiDB||SST, backup.meta files, backup.lock files|
|TiCDC||This tool is implemented by pulling TiKV change logs. It can restore data to a consistent state with any upstream TSO, and support other systems to subscribe to data changes.||TiDB||TiDB, MySQL, Apache Pulsar, Kafka, Confluent||Provide TiCDC Open Protocol||TiCDC only replicates tables that have at least one valid index. The following scenarios are not supported:|
|TiDB Binlog||Incremental replication between TiDB clusters, such as using one TiDB cluster as the secondary cluster of another TiDB cluster||TiDB||TiDB, MySQL, Kafka, incremental backup files||Support real-time backup and restore. Back up TiDB cluster data to be restored for disaster recovery||Incompatible with some TiDB versions|
|sync-diff-inspector||Comparing data stored in the databases with the MySQL protocol||TiDB, MySQL||TiDB, MySQL||Can be used to repair data in the scenario where a small amount of data is inconsistent|
Since TiDB v4.0, TiUP acts as a package manager that helps you manage different cluster components in the TiDB ecosystem. Now you can manage any cluster component using a single command.
curl --proto '=https' --tlsv1.2 -sSf https://tiup-mirrors.pingcap.com/install.sh | sh
Redeclare the global environment variable:
You can use the following command to see all the available components:
The command output lists all the available components:
Available components: Name Owner Description ---- ----- ----------- bench pingcap Benchmark database with different workloads br pingcap TiDB/TiKV cluster backup restore tool cdc pingcap CDC is a change data capture tool for TiDB client pingcap Client to connect playground cluster pingcap Deploy a TiDB cluster for production ctl pingcap TiDB controller suite dm pingcap Data Migration Platform manager dmctl pingcap dmctl component of Data Migration Platform errdoc pingcap Document about TiDB errors pd-recover pingcap PD Recover is a disaster recovery tool of PD, used to recover the PD cluster which cannot start or provide services normally playground pingcap Bootstrap a local TiDB cluster for fun tidb pingcap TiDB is an open source distributed HTAP database compatible with the MySQL protocol tidb-lightning pingcap TiDB Lightning is a tool used for fast full import of large amounts of data into a TiDB cluster tiup pingcap TiUP is a command-line component management tool that can help to download and install TiDB platform components to the local system
Choose the components to install:
tiup install dumpling tidb-lightning
It is recommended to see the release log and compatibility notes of the new version.
tiup update --self && tiup update dm