VBrick dme Admin Manual page 155

that triggers the DME into doing a cached reflection of the stream. Most viewers are served
from the DME's cache instead of each viewer pulling the stream from Akamai.
Be aware that there are limitations to the number of VC Live Webcast viewers that a DME
can service depending on the level of the DME and, if virtual, the VM's provisioned CPU
and Memory. Also the number of Cache Workiers and the bitrate of the streams have an
impact. Please refer to the following table when developing your deployment strategy with
respect to reflecting Akamai through the DME.
All tests were run on a DME 7570:
• With 1 Worker, single call, a 7570 can service 500 viewers at 500k call, and up to 250
viewers at 3Mb call.
• With 2 Workers, single call, a 7570 can service 900 viewers at 500k call, and up to 400
viewers at 3Mb call.
• With 8 (maximum setting) Workers, a 7570 can service 1400 viewers at 500K call, and up
to 400 viewers at 3Mb call.
Notice the increase of supported viewers as the number of workers increases. However, the
high end 3Mb calls, are all at 400 suggested viewers. As always, please test within your
environment on your network to identify optimal settings and possible choke points.
The default setting is the number of maximum available workers in the number of DME
cores but it is capped at 8.
Please see Rev documentation for additional details.
Streaming
DME Admin Guide
Output Stream Configuration
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