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Big bluebutton presentation
 

Big bluebutton presentation

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    Big bluebutton presentation Big bluebutton presentation Presentation Transcript

    • BigBlueButton OpenSource Web Conferencing
    • Why Web Conferencing?
      •   
      • Online enrollments = enrollment 2
    • Why Web Conferencing?
      •   
      • Online enrollments = enrollment 2
      •    +
      •   F2F Experience
    • Why Open source?
      • Money
        • GoToTraining  w/200 limit = $349/mo per class  or  $1596 per 16 week class
        • WebEX  25 limit $49/mo per class
      • Market Volativity 
        • DimDim bought by Salesforce
        • Blackboard bought Elluminate & Wimba
    • Why BigBlueButton?
      • DimDim 
        • Used DimDim to some extent as a add-on to Moodle
        • Free un-hosted version = no recording
        • DimDim had a "community" OSS version you could host w/ recording
      • Then we started having problems...
    • Why BigBlueButton?
      • DimDim 
        • OSS community version abandoned 3-2-2009 and left broken.
    • Why BigBlueButton?
      • DimDim 
        • OSS community version abandoned 3-2-2009 and left broken.
    • Why BigBlueButton?
      • BigBlueButton 
        • 15 min install
          • Virtualized Image (runs Ubuntu server)
            • Vmware 
            • Virtualbox 
            • Etc... 
          • Ubuntu 10.04 packages 
            •   sudo apt-get install bigbluebutton
    • Whats in BigBlueButton?
      • BigBlueButton 
        • Audio Conferencing via VOIP or Computer Mics
        • Screen broadcasting
        • Webcam broadcasting
        • Presentation conversion and Display
        • Whiteboard
    • Whats NOT in BigBlueButton?
      • BigBlueButton 
        • Recording and Play back
          • planned for 0.80
          • Current release is 0.71a
    • BigBlueButton Tech-stuff
      • BigBlueButton 
        • Hardware Requirements
          • 2GB Ram
          • 2+ Ghz Processor
        • Bandwidth Requirements
          • Y=40kbps
          • W= Number of webcams
          • U = Number of Users watching
      • Server Incoming BW = W * Y
      • Server Outgoing BW = W*(U-1)*Y
      • Ex:  1 Teacher (showing webcam) with 35 students watching
      •    Incoming BW = 1*40kbps = 40kbps
      •    Outgoing BW = 1 * 34* 40 = 1360kbps
    • BigBlueButton Tech-stuff
      • BigBlueButton 
        • Ports that need to be open on server.
          • All TCP
            • 80 
            • 9123 for desktop sharing
            • 1935 for RTMP (Real Time Messaging Protocol)
        • How many simultaneous users?
          • Bottleneck is Java heap size. Default (128mb)
          • At Default.. server crashed at 193 users in a classroom.
            • T. Ram usage = 728MB  (525MB was Java)
            • CPU < 30% utilized 
            • BW = In: 8 Mbit/s Out: 112Mbit/s
    •