Gravity 简体中文

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Gravity is used to replicate data between various inputs and outputs (databases, message queues).

It is designed to be a customizable data replication tool that:

• Supports multiple sources and destinations

• Supports Kubernetes-based replication cluster

Use Cases

• Data Bus: Use Change Data Capture (MySQL binlog, MongoDB Oplog) and batch table scan to publish data to message queue like Kafka.
• Unidirectional data replication: Replicates data from one MySQL cluster to another MySQL cluster.
• Bidirectional data replication: Replicates data between two MySQL clusters bidirectionally.
• Synchronization of shards to the merged table: Synchronizes MySQL sharded tables to the merged table. You can specify the corresponding relationship between the source table and the target table.
• Online data mutation: Data can be changed during the replication. For example, rename the column, encrypt/decrypt data columns.

Features

Input support

| Input | Status | |---|---| | MySQL Binlog | ✅ | | MySQL Scan | ✅ |
| Mongo Oplog | ✅ | | Mongo Scan | ✅ | | TiDB Binlog | Doing | | PostgreSQL WAL | Doing |

output support

| Output | Status | |---|---| | MySQL/TiDB | ✅ | | Kafka | ✅ |
| Elasticsearch | Beta |

Data mutation support

Gravity supports the following data mutations:

• Ignore specific data
• Renaming columns
• Deleting columns

Documentation

• Architecture
• Quick Start
• Configuration
• Cluster Deployment

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Special thanks to @dantin, @LiangShang, and @liwink for the early support to this project, and thanks @CaitinChen for the initial translation of the documentation.