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jraines/persistence.md

Created May 17, 2011 18:30
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Notes on Adam Keys' presentation "Mixing a persistence cocktail"
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persistence.md
  • Marshaling AR objects: dangerous if internal structure of AR object changes with Rails change

Relaxing consistency requirements

  • Is it ok for users to see slightly older data?

Configuring

  • Initializer that loads yaml file that loads different connections per Rails environtment

Versioned Keys

Read-repair

Instrument and log everything

  • Wrap connection library in instrumentation module to give you analysis while in dev mode
  • Throw good exceptions so you can grep logfiles.
    #get this code from @realadamkeys

Feature switches, progressive rollout

  • Will this new thing melt my db?
  • Use the 'rollout' gem
  • Activate new features by user group or by percentage of users
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