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Microsoft Orleans Grain Persistence using PostgreSQL

I didn’t found the documentation really clear on the steps involved when using Grain Persistence in combination with PostgreSQL.

So here is my attempt to describe the process:

    • Invariant should be set to ‘npgsql’
    • ConnectionString should be set to the connection to the PostgreSQL instance you want to use
    • UseJsonFormat should be set to true as PostgreSQL has good Json support.
  • Let your grain inherit from Grain<> and specify a state object:
  • Add a StorageProvider attribute on top of your Grain and set the name to the storage name you used inside the cluster config
    • In our example we had set this to ‘OrleansStorage’:
  • Execute the PostgreSQL-Main.sql and PostgreSQL-Persistence.sql scripts inside the OrleansAdoNetContent/PostgreSQL folder to create the necessary database objects
  • Now you are good to go!
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