O/S Deployment Thread, Fog Multicast in Technical; Hi, I have installed a FOG server on Ubuntu. WOrks really well on unicast, takes about 15mins to image a ...
24th May 2009, 10:19 PM #1
Hi, I have installed a FOG server on Ubuntu. WOrks really well on unicast, takes about 15mins to image a machine. However, when I try unicast, it does work, but the send speed drops to about 5mbps, and reckons it will take 36hours!
I thought multicast was supposed to be just as fast as unicast? Multicast is working, just extremely slowly. It looks like queueing the imaging with 1 or 2 at a time will be faster!
Machine specs aren't great, 2.8Ghz with 512mb ram. 100mbps network.
Any thoughts? Thanks in advance.
25th May 2009, 09:49 AM #2
I've not used FOG so I'm not sure how well it does multicast. The wiki says "Multicasting in FOG may require special switch configuration." which is a wonderful get out clause :-)
typically, you need to look at IGMP snooping on your switches - it should be enabled to allow multicast to work well.
Thanks to srochford from:
rocknrollstar (25th May 2009)
25th May 2009, 10:23 AM #3
Thanks srochford. Gotta admit, routers and switches scare me, not really sure what to do with them. No worries, I'll just use fog to do a unicast, but queue them up a few at a time. Won't be as fast as multicast working properly, but probably faster than multicast not working....
Thanks for your help anyway.
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