Distributed Transactions Manager
What is DTM
DTM is a distributed transaction framework which provides cross-service eventual data consistency. It provides saga, tcc, xa, 2-phase message, outbox, workflow patterns for a variety of application scenarios. It also supports multiple languages and multiple store engine to form up a transaction as following:
Who's using DTM (partial)
Features
- Support for multiple transaction modes: SAGA, TCC, XA, Workflow, Outbox
- Multiple languages support: SDK for Go, Java, PHP, C#, Python, Nodejs
- Better Outbox: 2-phase messages, a more elegant solution than Outbox, support multi-databases
- Multiple database transaction support: Mysql, Redis, MongoDB, Postgres, TDSQL, etc.
- Support for multiple storage engines: Mysql (common), Redis (high performance), BoltDB (dev&test), MongoDB (under planning)
- Support for multiple microservices architectures: go-zero, go-kratos/kratos, polarismesh/polaris
- Support for high availability and easy horizontal scaling
Application scenarios.
DTM can be applied to data consistency issues in a large number of scenarios, here are a few common ones
Quick start
run dtm
Start an example
Suppose we want to perform an inter-bank transfer. The operations of transfer out (TransOut) and transfer in (TransIn) are coded in separate micro-services.
Here is an example to illustrate a solution of dtm to this problem:
Code
Usage
TransOutTransIn
Rollback upon failure
If any forward operation fails, DTM invokes the corresponding compensating operation of each sub-transaction to roll back, after which the transaction is successfully rolled back.
Let's purposely trigger the failure of the second sub-transaction and watch what happens
TransOutTransInTransOutRevert
More examples
If you want more quick start examples, please refer to dtm-labs/quick-start-sample
The above example mainly demonstrates the flow of a distributed transaction. More on this, including practical examples of how to interact with an actual database, how to do compensation, how to do rollback, etc. please refer to dtm-examples for more examples.
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