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Thread: Concurrent live streaming limit - 2xE5645+16g ram vs 1xE3-1245+8g ram

  1. #1
    Join Date
    Dec 2011
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    Default Concurrent live streaming limit - 2xE5645+16g ram vs 1xE3-1245+8g ram

    Hi,

    Please advise conccurrent streaming limit of the following 2 different configurations

    server # 1. 2 x E5645 CPU and 16g ram
    server # 2. 1x E3-1245 CPU and 8g ram

    Assuming there is no network limitation at all (plenty of bonded NIC, and upstream connectivity)
    Both running 64bit OS, 64bit Java, same HD (but prob won't matter since it's not VOD application)
    For live streaming application

    I would think server #1 can support higher concurrent stream but at almost 3 times the cost. Therefore, would it be more pratical to run 3 x server #2 and thus gain higher concurrent streaming than a single server #1?

  2. #2
    Join Date
    Dec 2007
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    22,013

    Default

    You can get a load testing tool by sending request to test@wowza.com

    Richard

  3. #3
    Join Date
    Dec 2011
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    Default

    Richard,

    I was hoping to get some concurrent stream estimates first before acquiring the hardware. Any kind of guess/estimate is greatly appreciated.

  4. #4
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    Bandwidth (network throughput) is the usual limiting factor. Either machine will probably saturate a 1 or 2 gbs nic with much room to spare. Hardware recommendation is generally: late module dual quad cpu, 4 - 8 gigs of RAM (16 can't hurt) and 1 - 4 gbs nic, 64bit OS/JVM. I can't estimate number of streams, but if the machine is up to speed, you should get about 800mbs/stream bitrate per 1gbs nic.

    Richard

  5. #5
    Join Date
    Dec 2011
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    Hi Richard,

    Thanks again for the info.

    If I do my math correctly then,

    800mbps per 1g nic = 800000 kbps
    with each stream at 1000kbps = 800 concurrent live streams

    under the same consideration, If I have a VOD backend server stream to edge servers to reach the public audiences, is it safe to also say each 1g NIC can handle 800 concurrent stream? assuming that this NIC only does streaming out, and feeds from backend server is from a separate "private network" NIC.

  6. #6
    Join Date
    Dec 2007
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    Yes, sounds right.

    Richard

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