Talks

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Revision as of 04:38, 20 August 2007 by Dtbartle (talk | contribs)
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Encoding

We use dvgrab to rip the talks from the camera and ffmpeg to encode.

Mirrors

  • taurine (90 Mbps) [It can probably push much more if it were on a gigabit link]
  • citric-acid (250 Mbps)
  • natural-flavours (200 Mbps)
  • artificial-flavours (200 Mbps)
  • perpugilliam (90 Mbps)

The list of mirrors can be found in /users/www/mirrors.txt; the web server selects a random mirror from this list at each file request. We now run snmpd so we have real-time access to network and cpu load data. We should therefore be able to write a more intelligent mirror selection script.

We also use mirror.cs to mirror on-campus.

QoS

We are currently looking at implementing QoS on the host end. IST's QoS plan is documented here: http://ist.uwaterloo.ca/~dkeenan/docs/QoS-plan-draft.html. IST recommends using "IP Precendence 1, PHB CS1, DSCP 8, CoS 1". The ports we want to limit are 80 (HTTP) and 6900-6999 (BitTorrent).

DSCP Information:

CoS/802.1p Information:

Faculty Computing Implementations:

Our switch (HP ProCurve 2810) supports DSCP -> 802.1p mappings. Other ProCurve switches likely support this as well (need to check with dlgawley though).

The /etc/network/if-up.d/csc-mirror script (puppetized) adds the iptables rules we need.