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We are running multiple load tests every day against one of our GAE apps. We use the following pattern:

  1. Start a load test and let it run for a few hours.
  2. Look at graphs.
  3. Optionally deploy a new version of our app with performance improvements.
  4. Go back to 1.

Each load test creates a couple hundred front end instances. We would like to terminate those between individual load tests even when we are not deploying a new version of our app.

Is there a way to terminate all dynamic instances? Right now we either have to deploy a new version or terminate all instances by hand.

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2 Answers 2

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Maybe have them all periodically probe the datastore (or memcache) for a kill value?

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Yes, each instance could probe a datastore/memcache kill value. But how could it trigger it's own shutdown based on that? –  Ingo Jun 4 '13 at 19:04
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We had a similar problem - I found that disabling the app in Application Settings and then re-enabling it terminated all 88 instances we had running, without any other adverse effects.

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Wouldn't disabling the app stop all incoming traffic temporarily? –  Ingo May 10 '14 at 2:45
    
Yes of course, but the question asks how to terminate all dynamic instances. Even so, it's only down for a few seconds. –  Julian May 13 '14 at 18:06

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