Difference between revisions of "Troubleshoot Downloading - Multicast"

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= Multicast's roles in FOG =
 
= Multicast's roles in FOG =
  
Multicasting in FOG uses UDPcast to send a single image to multiple computers using only slightly more bandwidth than sending the image to a single computer or unicast. Multicasting will be slightly slower than a single unicast task because unicast decompresses the image on the target hosts, while multicast decompresses the image at server level and then sends the decompressed image to the hosts.
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Multicasting in FOG uses UDPcast to send a single image to multiple computers using only slightly more bandwidth than sending the image to a single computer or unicast. Multicasting will be slightly slower than a single unicast task.
  
 
= Testing Multicast =
 
= Testing Multicast =

Revision as of 18:10, 18 August 2015

Article under construction. Below, you will find notes / gibberish that I'm collecting to make into an article.


Multicast's roles in FOG

Multicasting in FOG uses UDPcast to send a single image to multiple computers using only slightly more bandwidth than sending the image to a single computer or unicast. Multicasting will be slightly slower than a single unicast task.

Testing Multicast

udp-sender http://linux.die.net/man/1/udp-sender




Inside the FOG DB, there are two multicast association tables. You can delete all the rows in those tables, re-install FOG, and try again.


mysql
use fog
DELETE FROM `multicastSessions` WHERE 1;
DELETE FROM `multicastSessionsAssoc` WHERE 1;
DELETE FROM `tasks` WHERE `taskTypeID` = 8;
quit

Check the status of FOGMulticastManager and restart:

Fedora:

systemctl status FOGMulticastManager
systemctl restart FOGMulticastManager

Ubuntu:

sudo service FOGMulticastManager status
sudo service FOGMulticastManager restart