Jump to content
  • 0

AWS - Linear Scale of Instance Capacity

Fabio Cardoso


According to the "WebRTC Streaming Cost Calculator", an EC2 instance with 32 cores would support 2000 concurrent users.Is this scale linear (or at least close to linear?)


For example, a c5.9xlarge (36 ECU) instance would support something close to 2000 viewers.Could a c5.18xlarge (72 ECU) instance support 4000 viewers?


Would it be safe to say that a c5.24xlarge (96 ECU) instance, the largest available on AWS, would support 5000 users?


I understand that I can use Ant Media Server as a cluster. In fact, I have used ant clusters a lot. But it's easier and less costly to use only one instance for small streams.


I could also try to simulate a load with the tools that are available, but they are never representative of actual usage.


I want to know how far I can go.


Link to comment
Share on other sites

  • Answers 1
  • Created
  • Last Reply

Top Posters For This Question

Top Posters For This Question

1 answer to this question

Recommended Posts

  • 0


Yes, it is very close to linear according to our tests, however, as you see in the Cost Calculator the maximum limit is 32 core instances. 
Up to 32, we know that it is at least close to linear. The tests for the instances with higher core counts are not extensively conducted. Here, we don't want to give false information about any issue. We can add this issue to our schedule and only after that I can say that you should be using a 72 ECU instance or a cluster setup.

Thank you for your understanding,

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...