How data is stored

Where facts live, what shape they take, how they survive.

  1. Stop 1, next

    What must survive state

    Think of it when something would be lost if the server restarted right now.

    StartAbout 3 minutes. The word for it comes at the end.

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    A table with rules database

    Think of it when state must be shared by many people, searched, or kept safe through a crash.

    StartAbout 3 minutes. The word for it comes at the end.

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    The agreed shape schema

    Think of it when two programs pass the same data between them, or a field is about to change name or type.

    StartAbout 3 minutes. The word for it comes at the end.

  4. Stop 4, next

    A fast copy that can go stale cache

    Think of it when something is slow, and someone says "just save the answer".

    StartAbout 3 minutes. The word for it comes at the end.

  5. Stop 5, next

    All or nothing transaction

    Think of it when one action needs several writes, and a half-finished set would be wrong.

    StartAbout 3 minutes. The word for it comes at the end.

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    Data written out to send serialization, JSON

    Think of it when data leaves one program for a file, a database or another program.

    StartAbout 3 minutes. The word for it comes at the end.