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First of all thank you for your answer, whether it is useful or not. I don't quite understand Container, the problem is as follows

  1. Is Contatiner a component of NodeManager?
  2. Is the Contatiner created with NodeManager?
  3. When NodeManager or MRAppMaster wants to start a Contatiner, do you only need to configure it?
  4. Is there a collection of available resources in the scheduler? Will some resources be allocated for running jobs every time? Is it like cutting a ham?
  5. I want to know how a Contatiner is started or created in ResourceManager.

I hope the answer can be simpler and easier to understand, and it is best to have a picture show. Thank you.

Diiiiza
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    Welcome to StackOverflow. Have you already searched for an answer to your question, [on this site](https://stackoverflow.com/search?q=%5Bhadoop%5D+%5Byarn%5D+container+nodemanager) or [elsewhere](https://www.google.com/search?q=yarn+container+nodemanager)? It seems very close to [other questions](https://stackoverflow.com/questions/39552301/hadoop-2-0-applicationmaster-vs-nodemanager) on SO, and [YARN's official doc](https://hadoop.apache.org/docs/r3.1.1/hadoop-yarn/hadoop-yarn-site/NodeManager.html) seems helpful too. If not, try to explain what you are still missing – Pierre Gramme Aug 06 '20 at 08:47
  • Thank you, sir, I just read the official document and the links you gave me, but it didn't help me, I reorganized my question, I hope this can make my question more clear.I reposted it, but I don’t know if there are any grammatical errors in these sentences. (I mean the sentence describing the problem);https://stackoverflow.com/questions/63294017/how-does-work-the-resource-scheduler-in-resource-manager-work-with-nodemanager-a – Diiiiza Aug 07 '20 at 01:40
  • You could have edited the present question instead of opening a new one. I commented over there – Pierre Gramme Aug 10 '20 at 07:52

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