Tobias and I ran 150 or so single stream videos through a 4 server cluster a couple of weeks ago. Each virtual server had only one core, and each was attached to a NAS appliance via NFS.
With a setup like this, Matterhorn 1.1.x processes 4 videos in parallel, while the rest wait in a queue. The average processing time was 0.7 hours per hour of video using the default workflow, with segmentation and OCR enabled, and producing flash, avi, and m4a tracks for distribution. These numbers may help you to determine how much processing power you'll need to handle 300 hours of video per week, but of course a lot depends on the encoding profiles you choose. You could probably get by with just a few servers, but the more cores you have, the fewer recordings you'll have sitting in the queue, and the faster you'll be able to deliver your lectures. Josh On Thu, Mar 31, 2011 at 7:20 PM, Christopher Brooks <[email protected]>wrote: > Hi Richard, > > > We are about to evaluate replacements for our Lectopia installation. > > We currently record about 3oo hours per week. From the Opencast > > website I see that this is way above what's reported there. Has > > Opencast moved beyond trial mode anywhere? Will it be sufficiently > > mature to be implemented in 2012 and is there an implementation > > partner who will operate in Australia. Specifically I am looking for > > assistance with installation and integration with University > > databases and systems. > > I think there are several universities using opencast in deployment, > but none that I know of doing 300 hours per week. We're doing around > 50 hours per week, and projecting an increase of about 75% for next > fall. > > A feature for version 1.2 of Matterhorn (about a month before testing > begins) is a load testing suite which should help clarify how the > system scales for different scenarios. I'm coordinating effort around > this deliverable, and would be interested in hearing more about the > kind of usage you currently see at uow. > > Regards, > > Chris > > -- > Christopher Brooks, BSc, MSc > ARIES Laboratory, University of Saskatchewan > > Web: http://www.cs.usask.ca/~cab938 > Phone: 1.306.966.1442 > Mail: Advanced Research in Intelligent Educational Systems Laboratory > Department of Computer Science > University of Saskatchewan > 176 Thorvaldson Building > 110 Science Place > Saskatoon, SK > S7N 5C9 > _______________________________________________ > Matterhorn-users mailing list > [email protected] > http://lists.opencastproject.org/mailman/listinfo/matterhorn-users >
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