Hi community, Currently, Dubbo supports multi groups and multi versions in one same Application. From the document of Dubbo site, we can see what those property's initial purpose.
- Version: When an interface to achieve an incompatible upgrade, you can use the version number transition. Different versions of the services do not reference each other. - Group: When you have multi-impls of a interface, you can distinguish them with the group. As we know, GetServiceKey of URL will return a String like *Group/ServiceInterfaceName:Version* Today, let us think again about Group's purpose. Two questions I'd like to raise for disccusion 1) If there are multi-impls of one interface, can we use Version instead of Group to achieve it? I thinks Yes. This means that currently Groups is duplicated with Version. 2) Group should be Cluster Group which used for router like Unitazation( 阿里内部叫单元化 ) or Logical DataCenter. This means the Group will be dynamic property of Dubbo service and can be changed during runtimes by some dynamic rule of configuration. Please give your comments on it. BTW, it is very important for Dubbo's supports of the inside scenarios in actual Alibaba's using. Regards JeffLv
