Handling large volumes of denormalized read model updates in CQRS

Question

I am developing a system based on CQRS events (not the first), where my read models are denormalized and stored in a database of documents optimized for reading (MongoDb). Nothing special. Now this particular reading model is a document containing a user ID and a potentially large array of groups of which the user is a member:

{
  "userId": 1,
  "userName": "aaron",
  "groups": [
    {
      "groupId": 1,
      "name": "group 1"
    },
    {
      "groupId": 2,
      "name": "group 2"
    }
  ]
}

There can be 10 thousand users who are members of the same group (as one example: imagine a group of which each employee is a member).

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Answer 1

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