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I'm planning to implement this schema in Mongodb, I have been doing some readings about schema design, and the notion was whenever you structure your data like a relational database you must be doing something wrong.

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My questions:

  • what should I do when collection size gets larger than 16MB limit? app_log in server_log collections gets might in some cases grow larger than 16MB depending how busy the server is.

    I'm aware of the cap feature that I could use, but the requirement is store all logs for 90 days.

  • Do you see any potential issues with my design?

  • Is it a good practice to have the application check for collection size and create new collection by day / hour ..etc to accommodate log size growth?

Thanks

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16 MB is the maximum size of single document, e.g. one user.

The size of the collection is limit by maximum database only.

https://docs.mongodb.com/manual/reference/limits/

So logging to the database should be no problem. In my opinion using sensible indizes including _id is superior to a heap of collections.

It is not clear to me what you actually want to store in your database so I cannot really comment on the structure. Generally speaking there are three ways to handle relations: Using arrays

  • storing subdocuments or
  • ids of documents (You would have to retrieve those via a separate database request)
  • invert the relation by giving all referenced documents a field containing the parent document id

If you give more details, chances are somebody can give you a more detailed answer.

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