How does AppConfig service figure out the targets for a deployment?

Question

Hi,   
We are looking into using appconfig for our runtime configuration. From the user guide, it is not clear how to set the targets for an environment. If the targets setting is not required, how does the deployment know how many hosts to deploy for each step? For each step, according to the strategy, there are number of targets will get deployed, how does the appconfig service decide which hosts (client ids) to deploy?  
  
Thanks!

xiaoben · Answer

Thanks. That's very helpful. Is it possible that the same clientId might be assigned to a different percentage bucket in different deployments even for the same deployment strategy?

Joel_H · Answer

We don't make any guarantees about when a specific target will receive a deployment. The behavior will be stable within a deployment, but you shouldn't make any assumptions that ordering in one deployment will be similar in the next.

Joel_H

answered 6 years ago

Joel_H · Answer

Targets are defined dynamically by the unique _ClientId_ parameter used to call the GetConfiguration API (https://docs.aws.amazon.com/appconfig/2019-10-09/APIReference/API_GetConfiguration.html).  
  
During a deployment, we probabilistically assign the _ClientId_ to a percentage bucket, 0-99. When the percentage complete for a deployment passes the percentage bucket the _ClientId_ was assigned, it receives the new deployment.  
  
For example, say you use a linear deployment strategy with a deployment duration of 5 minutes and a growth factor of 10.  If you have 100 targets, then roughly 10 targets will receive the new deployment every 30 second interval.

How does AppConfig service figure out the targets for a deployment?

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