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Multicast to 10 PC creates two upd-sender processes

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  • B
    brizio
    last edited by Jun 16, 2015, 8:49 PM

    Hi all,
    just a question: i created a group with 10 pc and I created a multitask deploy job for that group.
    Fog created two different row in the multicastSessions table one with 7 msClients and one with 3 msClients.
    This is slowing down the whole deploy process (more network traffic, server I/O contention because of the two udp-sender processes).
    Is this behaviour normal? I supposed to have just one multicastSessions with 10 clients.

    I’m using fog svn 3559 on Centos 6.6.

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    • T
      Tom Elliott
      last edited by Jun 16, 2015, 9:00 PM

      I guess we need details.

      Are all systems in the group set with the same image id?

      Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

      Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

      Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

      1 Reply Last reply Reply Quote 1
      • B
        brizio
        last edited by Jun 17, 2015, 6:02 AM

        Hi Tom,
        thank you for the quick reply.
        Yes, all the 10 PC in the same group are set with the same Image Id (ID: 9).
        I can see the same ID also in the multicastSessions table, column msImage.

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        • B
          brizio
          last edited by Jun 17, 2015, 6:13 AM

          It seems also that the upd-sender process started with
          min receivers=5 for the first session (the one set with msClients=7)
          min receivers=3 for the second session (the one set with msClients=3)

          that means that 2 PC were not depoloyed: in fact they are still waiting on the first PartClone screen.

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          • T
            Tom Elliott
            last edited by Jun 17, 2015, 10:03 AM

            @brizio Can you clear the multicastSessions, multicastSessionsAssoc, and tasks tables?

            The tasks I only want you to clear the multicast jobs.

            A mysql statement to do these things would be:

            TRUNCATE TABLE multicastSessions;
            TRUNCATE TABLE multicastSessionsAssoc;
            DELETE FROM tasks WHERE taskTypeID=8;
            

            My guess, from an earlier revision, a multicast session didn’t clear properly. Because of the non-clearing, a few hosts linked to the wrong Job and the others, who had no prior setting stored in the DB, created their own session.

            Again, this is just a guess, as I really don’t know what actually caused this to happen.

            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

            Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

            Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

            W 1 Reply Last reply Jun 17, 2015, 12:02 PM Reply Quote 0
            • B
              brizio
              last edited by Jun 17, 2015, 10:20 AM

              Right, i’ll clean the DB then. Thank you.

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              • W
                Wayne Workman @Tom Elliott
                last edited by Jun 17, 2015, 12:02 PM

                @Tom-Elliott said:

                @brizio Can you clear the multicastSessions, multicastSessionsAssoc, and tasks tables?

                The tasks I only want you to clear the multicast jobs.

                A mysql statement to do these things would be:

                TRUNCATE TABLE multicastSessions;
                TRUNCATE TABLE multicastSessionsAssoc;
                DELETE FROM tasks WHERE taskTypeID=8;
                

                My guess, from an earlier revision, a multicast session didn’t clear properly. Because of the non-clearing, a few hosts linked to the wrong Job and the others, who had no prior setting stored in the DB, created their own session.

                Again, this is just a guess, as I really don’t know what actually caused this to happen.

                I’m working on a “Troubleshoot Multicast” article that has commands more friendly to Red-Hat based distros… aparently the truncate commands don’t work in Fedora 22… so… Here you go:

                https://wiki.fogproject.org/wiki/index.php/Troubleshoot_Downloading_-_Multicast

                Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                Daily Clean Installation Results:
                https://fogtesting.fogproject.us/
                FOG Reporting:
                https://fog-external-reporting-results.fogproject.us/

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