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Thread: Bandwidth Connection thresh hold...

  1. #1
    Join Date
    May 2011
    Posts
    6

    Smile Bandwidth Connection thresh hold...

    Hello,
    I am newbee to wowza. I have been using shoutcast for the last 2 years. I have a question, i have a 10x10 line from cable vision in the bronx with this set up from my flash encoder:
    <?xml version="1.0" encoding="UTF-16"?>
    <flashmedialiveencoder_profile>
    <preset>
    <name>Custom</name>
    <description></description>
    </preset>
    <capture>
    <video>
    <device>ManyCam Virtual Webcam</device>
    <crossbar_input>0</crossbar_input>
    <frame_rate>15.00</frame_rate>
    <size>
    <width>640</width>
    <height>480</height>
    </size>
    </video>
    <audio>
    <device>SB Audigy Audio [2020] [0]</device>
    <crossbar_input>0</crossbar_input>
    <sample_rate>44100</sample_rate>
    <channels>2</channels>
    <input_volume>75</input_volume>
    </audio>
    <timecode>
    <frame_rate>15</frame_rate>
    <systemtimecode>true</systemtimecode>
    <devicetimecode>
    <enable>false</enable>
    <vertical_line_no>16</vertical_line_no>
    <burn>false</burn>
    <row>Bottom</row>
    <column>Left</column>
    </devicetimecode>
    </timecode>
    </capture>
    <process>
    <video>
    <preserve_aspect></preserve_aspect>
    </video>
    </process>
    <encode>
    <video>
    <format>VP6</format>
    <datarate>200;</datarate>
    <outputsize>640x480;</outputsize>
    <advanced>
    <keyframe_frequency>5 Seconds</keyframe_frequency>
    <quality>Good Quality - Good Framerate</quality>
    <noise_reduction>None</noise_reduction>
    <datarate_window>Medium</datarate_window>
    <cpu_usage>Dedicated</cpu_usage>
    </advanced>
    <autoadjust>
    <enable>false</enable>
    <maxbuffersize>1</maxbuffersize>
    <dropframes>
    <enable>false</enable>
    </dropframes>
    <degradequality>
    <enable>false</enable>
    <minvideobitrate></minvideobitrate>
    <preservepfq>false</preservepfq>
    </degradequality>
    </autoadjust>
    </video>
    <audio>
    <format>MP3</format>
    <datarate>96</datarate>
    </audio>
    </encode>
    <restartinterval>
    <days></days>
    <hours></hours>
    <minutes></minutes>
    </restartinterval>
    <reconnectinterval>
    <attempts></attempts>
    <interval></interval>
    </reconnectinterval>
    <output>
    <rtmp>
    <url>rtmp://74.77.195.208/live</url>
    <backup_url></backup_url>
    <stream>livestream</stream>
    </rtmp>
    </output>
    <metadata>
    <entry>
    <key>author</key>
    <value></value>
    </entry>
    <entry>
    <key>copyright</key>
    <value></value>
    </entry>
    <entry>
    <key>description</key>
    <value></value>
    </entry>
    <entry>
    <key>keywords</key>
    <value></value>
    </entry>
    <entry>
    <key>rating</key>
    <value></value>
    </entry>
    <entry>
    <key>title</key>
    <value></value>
    </entry>
    </metadata>
    <preview>
    <video>
    <input>
    <zoom>50%</zoom>
    </input>
    <output>
    <zoom>50%</zoom>
    </output>
    </video>
    <audio></audio>
    </preview>
    </flashmedialiveencoder_profile>

    how many connections could i top out at???

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    The audio + video datarate in this configuration is ~300kbs

    With a late model quad or dual quad cpu, 4 - 8g ram, 64bit OS/Java JDK, that is properly tuned, with a 4gbs nic (minus 20% overhead) you should get about 3.2gbs throughput, which could serve over 10,000 clients, in that scenario

    So, bandwidth/bitrate, assuming a good machine.

    Richard

  3. #3
    Join Date
    May 2011
    Posts
    6

    Smile

    Thanks for the info, now my machine is dual 2.4 gigaherz server from supermicro with 16 gigs of memory, a raid1 two 18gig scsi and a raid5 3 36gig scsi.When you say 4 gigs nic, what do you mean? Are you talking nic cards or swithches because right now this is a stand alone server connected just to a firewall appliance rite now.

    David
    Last edited by dbonilla; 03-11-2012 at 06:46 PM.

  4. #4

    Default

    He's talking about Link Aggregation, a.k.a. Bridging NICs, or Bonded NICs. It's the technique of using multiple NICs that function as a single IP connected to a switch with a faster backplane. This way you can have more total throughput, though the max speed of a single connection will be limited by the max speed of a single NIC.

    The NICs can even be on different IPs and you could have one Wowza application assigned to each IP and loadbalance between them.

  5. #5
    Join Date
    May 2011
    Posts
    6

    Default

    Very cool because my machine has three nics on it.You guys are great. I'll get back to you guys, I'm going to reconfigure this machine it's running 32bit right now, did not upgrade when i got the memory. Am i right in saying linux runs wowza better Windows and if so what flavor?

    David

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