Scaling overview

[Charles Bryant]

Hi I am new to Kurento and media streaming in general. 

What I would like to know is a high overview of how scaling an application would work. 

From my experiments it seems very easy to create a live stream up until the point where networking fails because of too many streams. My use case would be many publishers of webinars one way to even more subscribers. eg Lets say 10 publishers each with 500 subscribers.

[Micael Gallego]

If a single "media session" fits in one KMS, you will have to have several servers for several sessions (one for each). It is relatively easy. 

If a single "media session" doesn't fit in a single server, because too many users, the you will need to use several KMSs for the same session (connecting KMSs together). It is a bit more complex.

Also remember that webRTC should be used only if you need ultra low latency < 400ms. For broadcasting, if you can tolerate latencies of 10 seconds or so.. it is better to use HLS or a similar technique. 

For information related to this please take a look to this post: https://bloggeek.me/how-many-users-webrtc-call/

Remember that if you have a business use case based on WebRTC, we offer commercial support to deal with scalability, bug fixes, consultancy, etc.

Best regards

Micael Gallego

Kurento / OpenVidu Project Lead

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[Charles Bryant]

Thanks for your reply. 

So for large viewing audiences on a pure rtc solution I would need to orchestrate a fan out architecture of KMS servers, which sounds daunting but I do not think I will achieve large volumes for some time.

I think latency could be acceptable option especially if development is simpler, does Kurento support WebRTC to HLS recording?

Thanks

On Thursday, March 15, 2018 at 11:30:22 PM UTC, OpenVidu wrote:

If a single "media session" fits in one KMS, you will have to have several servers for several sessions (one for each). It is relatively easy. 

If a single "media session" doesn't fit in a single server, because too many users, the you will need to use several KMSs for the same session (connecting KMSs together). It is a bit more complex.

Also remember that webRTC should be used only if you need ultra low latency < 400ms. For broadcasting, if you can tolerate latencies of 10 seconds or so.. it is better to use HLS or a similar technique. 

For information related to this please take a look to this post: https://bloggeek.me/how-many-users-webrtc-call/

Remember that if you have a business use case based on WebRTC, we offer commercial support to deal with scalability, bug fixes, consultancy, etc.

Best regards

Micael Gallego

Kurento / OpenVidu Project Lead

On Thu, Mar 15, 2018 at 10:02 PM, Charles Bryant <charles...@rationetwork.co.uk> wrote:

Hi I am new to Kurento and media streaming in general. 

What I would like to know is a high overview of how scaling an application would work. 

From my experiments it seems very easy to create a live stream up until the point where networking fails because of too many streams. My use case would be many publishers of webinars one way to even more subscribers. eg Lets say 10 publishers each with 500 subscribers.

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[Micael Gallego]

Kurento can record WebRTC flows in files. 

Best regards

Micael Gallego

Kurento / OpenVidu Project Lead

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