Subsystems / plugins

EventStoreDB
1

Hello again

I’ve noticed there is a concept of subsystems in the codebase. Are there any plans to open it so that I, as a user, can register my own subsystems/plugins? Such a subsystem might for example contain native projections or things like competing consumers/persistent projections.

EventStore would load the plugins from the bin folder on startup. There probably should be also some way to ensure cluster-wise integrity such as checking if all nodes of the cluster have the same plugins (by comparing hashes of plugin assemblies?)

Szymon

2

How would you upgrade a node without taking all down?

3

Use semver instead of hashes. If major version if ES or any plugin changes, requires taking all down. Otherwise plugins with different minor versions would be expected to work. I am talking about something like raven boundles, not something every dev would implement for his ES deployment.