Блог CEO, CIO Виктора Карабедянц Блог CEO, CIO Виктора Карабедянц
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WOWZA

18 August 201718 August 2017 / By Виктор Карабедянц
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The scheme below displays the basic idea of streaming service based on AWS + WOWZA.wowza

The process logic is divided into 3 parts:

  • Work with streamers (origin )
  • Work with viewers (edge)
  • On call promos (ads) delivery (VOD)

Origin

RTMP stream comes to the load balancer AWS (wowza-origins), where it is decided which EC2 instance should it be redirected and attached to. On this instance there is a running service Wowza Streaming Engine, configured for content parsing. There is also the stream coding by means of the key SecureToken which is also declared on the edge side.

Edge

When a viewer wants to join a stream watch then he enters one of the instances for video retransmission through the load balancer AWS (wowza-edges). After that, using the module StreamResolver, the running service Wowza Streaming Engine knows which origin instance to  connect to and begin the content retransmission.

VOD

Video-content is kept here to be displayed in the app.

Since all the traffic between origin/edge/vod moves across the intranet, delays are low. But the traffic from balancer goes directly to the user. This moment can be solved in two ways:

  • AWS CDN
  • Wowza CDN

Both variants have their advantages and disadvantages, however, they can complement each other in a way to increase the speed of content delivery.

It is necessary to point out auto-scaling. It is implemented with the help of:

  • Creating own metrics based on managing instance.
  • Launch configuration
  • Ansible for configuring new instances.

The high speed of adding new instances (about 20-30 seconds) can be reached by means of:

  • Configured AMIs
  • Change of the part Wowza Streaming Engine configuration via REST API (Ansible)
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Виктор Карабедянц

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