ptgtp

3 ms·

1. 1.▲
   by ptgtp 13y ago

   Whether consistency is ensured at the application level or the database level, mistakes can be made. Someone can forget to set things up in a schema correctly in exactly the same way they can forget to implement things correctly at the appl
2. 2.▲
   by ptgtp 13y ago

   My reply was mainly aimed at the example posted here, really how often will a Dog Walker's set of Dogs change? Keep in mind that transactions can have retries too, so it's not enough for 2 requests to collide, it needs to be entit
3. 3.▲
   by ptgtp 13y ago

   "A typical scalable database engine like App Engine's Datastore will only look at each entity in isolation. Since the entities are technically fine in isolation, there's no guarantee of consistency from the engine level.&quot