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https://github.com/zhongantech/dmds
DMDS is a highly scalable distributed MySQL sharding middleware.
https://github.com/zhongantech/dmds
database java middleware mysql shard
Last synced: 6 days ago
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DMDS is a highly scalable distributed MySQL sharding middleware.
- Host: GitHub
- URL: https://github.com/zhongantech/dmds
- Owner: ZhongAnTech
- License: gpl-2.0
- Created: 2020-04-03T03:15:49.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2022-12-14T20:27:21.000Z (almost 2 years ago)
- Last Synced: 2023-02-27T06:26:50.263Z (over 1 year ago)
- Topics: database, java, middleware, mysql, shard
- Language: Java
- Homepage: https://github.com/ZhongAnTech/dmds
- Size: 495 KB
- Stars: 16
- Watchers: 4
- Forks: 3
- Open Issues: 6
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
Awesome Lists containing this project
README
# DMDS
__DMDS__(Distributed MySQL Database Service) is a MySQL sharding middleware base on [MyCAT](https://github.com/MyCATApache/Mycat-Server).
## What is Different ?
- __Table sharding__
Support sharding database and table in the same time.
- __Simplify__
Focus on MySQL , remove some unnecessary features like zookeeper config 、 catlte .
## Deploy
- __Package__
After download source code, package it with maven and JDK (verison >= 7).
```bash
mvn clean package -DskipTests=true
```
- __Start__
Copy package `dmds-server-xxx.tar` to deploy directory. Run `bin/startup.sh ` after unzip it.
```bash
cp target/dmds-server-xxx.tar.gz deploy/
cd deploy/
tar -xf dmds-server-xxx.tar.gz
cd dmds-server-1.0.0/
./bin/startup.sh
```
- __Stop__
Run `bin/stop.sh` to stop it.
## Sharding Configuration Example
Configuration files are under conf directory like MyCAT. Let's see an example for 8 sharding tables in 2 databases.
- __schema.xml__
Configure hostNode、dataNode and schema. Schema name is `dmds_test` , data node is `dn_dmds_test_00` and `dn_dmds_test_01`
```xml
select 1
```
- __rule.xml__
Configure tableRule and sharding function. Function class must be `com.zhongan.dmds.route.function.PartitionTbByMod`.
- shardColumnType
Data type of sharding column, `0` for numerical and `1` for string.
```xml
id
function_dmds_test_ts_order
2
4
0
```
- __server.xml__
Configure access user. user name is `dmds_test`
```xml
4fe313bd
dmds_test
```
- __Table distributed__
The physical table is distributed in order on 2 databases. Table names are automatically generated.
```sql
select TABLE_SCHEMA, TABLE_NAME from information_schema.TABLES where TABLE_SCHEMA like 'dmds_test_%' and TABLE_NAME like 'ts_order_%';
+--------------+---------------+
| TABLE_SCHEMA | TABLE_NAME |
+--------------+---------------+
| dmds_test_00 | ts_order_0000 |
| dmds_test_00 | ts_order_0001 |
| dmds_test_00 | ts_order_0002 |
| dmds_test_00 | ts_order_0003 |
| dmds_test_01 | ts_order_0004 |
| dmds_test_01 | ts_order_0005 |
| dmds_test_01 | ts_order_0006 |
| dmds_test_01 | ts_order_0007 |
+--------------+---------------+
```
## Contributing
See [Contributing to DMDS](CONTRIBUTING.md) for details on reporting bugs and commit pull request.
## License
DMDS are licensed under [GPL2.0 license](https://www.gnu.org/licenses/old-licenses/lgpl-2.0.html)
## More Information
For more information, please see [MyCAT documents](https://github.com/MyCATApache/Mycat-doc/tree/master/en).