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    FOG Server CPU Requirements

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    • T
      ty900000 @george1421
      last edited by

      @george1421

      I am running a multicast image right now and it is super slow, <20MB/sec and declining. With the unicast with 2 computers imaging, I was getting about 6GB/sec each. I did a little Googling around it seems as if our very old, crappy Dell PowerConnect switches are probably causing the issue. I guess they can’t handle the “amount” of multicast traffic - no surprise there…

      We should be getting Cisco switches soon, so I’ll have to test it with those and make sure they are configured to pass multicast traffic properly.

      Thanks!

      george1421G 1 Reply Last reply Reply Quote 0
      • george1421G
        george1421 Moderator @ty900000
        last edited by

        @ty900000 With multicast the speed of the slowest computer sets your maximum transfer rate. I can say that multicasting to 20 computers should just be slightly slower than a single unicast image.

        I would have to question your unit of scale. I could understand 20MB/s and 6GB/min. At 6GB/s you would need faster than a 20GbE network.

        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!

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        • T
          ty900000 @george1421
          last edited by

          @george1421

          Oh, you’re right! I meant <20MB/min for multicasting two machines and 6GB/min unicasting two machines. My bad!

          george1421G 1 Reply Last reply Reply Quote 0
          • george1421G
            george1421 Moderator @ty900000
            last edited by

            @ty900000 wow that sux on the performance scale.

            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!

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            • T
              ty900000 @george1421
              last edited by

              @george1421

              Which one sucks? The 20MB/min or the 6GB/min? Or both?

              Tom ElliottT george1421G 2 Replies Last reply Reply Quote 0
              • Tom ElliottT
                Tom Elliott @ty900000
                last edited by

                @ty900000 The 20MB a minute.

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                • T
                  ty900000 @Tom Elliott
                  last edited by

                  @Tom-Elliott

                  Ah, yeah. It was going to take over 13 hours to blow down a 17GB image. I think it’s the crappy L2 Dell switches can’t handle … much of anything. It’s a constant battle with them.

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                  • Tom ElliottT
                    Tom Elliott @ty900000
                    last edited by

                    @ty900000 Are the switches you have capable to be “managed”.

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                    • T
                      ty900000 @Tom Elliott
                      last edited by

                      @Tom-Elliott

                      Yeah, they can be managed. But, I can’t do much with them. Their documentation isn’t great and the are seriously lacking commands. I’m a CCNA, so I’m a little more used to Cisco-specific commands that do Cisco-specific things. These old PowerConnects either don’t have an equivalent or just have a very different and more difficult way of doing the same thing.

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                      • george1421G
                        george1421 Moderator @ty900000
                        last edited by george1421

                        @ty900000 said in FOG Server CPU Requirements:

                        20MB/min

                        I would expect a single unicast image to deploy about 6GB/m on a typical solid network. 4 to 5GB/m for a multicast.

                        You are multicasting to devices on the same vlan as the fog server?

                        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!

                        T JunkhackerJ 2 Replies Last reply Reply Quote 0
                        • T
                          ty900000 @george1421
                          last edited by

                          @george1421

                          Cool! Yeah, I was hoping to see 4-5 GB/min. We don’t have VLANs. Not yet, at least. The Dell PowerConnect switches are old and we only use them as a L2 switch for now. They can be managed, but they lack a lot of commands and documentation. Cisco Catalysts should be coming next quarter, I hope.

                          Tom ElliottT 1 Reply Last reply Reply Quote 0
                          • Tom ElliottT
                            Tom Elliott @ty900000
                            last edited by

                            @ty900000 If they’re used as “dummy” switches, maybe replacing them with simplified dummy switches (with GB if possible) would help improve things?

                            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.

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                            • T
                              ty900000 @Tom Elliott
                              last edited by

                              @Tom-Elliott

                              No, they’re not “dummy” switches. They are the whole entire network backbone, sadly. They’re so old when I unplugged one that hadn’t been turned off in years and plugged it back in, it was completely dead.

                              george1421G 1 Reply Last reply Reply Quote 0
                              • JunkhackerJ
                                Junkhacker Developer @george1421
                                last edited by

                                @george1421 said in FOG Server CPU Requirements:

                                I would expect a single unicast image to deploy about 6GB/m on a typical solid network.

                                is a typical network really that slow?

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                                Tom ElliottT george1421G 2 Replies Last reply Reply Quote 0
                                • Tom ElliottT
                                  Tom Elliott @Junkhacker
                                  last edited by

                                  @Junkhacker Your network is fairly special man, yes that’s about average lol.

                                  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)

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                                  • george1421G
                                    george1421 Moderator @Junkhacker
                                    last edited by

                                    @Junkhacker said in FOG Server CPU Requirements:

                                    @george1421 said in FOG Server CPU Requirements:

                                    I would expect a single unicast image to deploy about 6GB/m on a typical solid network.

                                    is a typical network really that slow?

                                    Yes I still have network envy of your setup. But not everyone has all gold and chrome computers either.

                                    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!

                                    JunkhackerJ 1 Reply Last reply Reply Quote 2
                                    • george1421G
                                      george1421 Moderator @ty900000
                                      last edited by

                                      @ty900000 I there any chance you could setup a “test” network switch to just the fog server and a few test systems to compare the multicast to unicast to. If you are multicasting across your campus you may have other underlying issues that mutlicasting is making worse (like a 100Mb link somewhere). At least using all on switch backbone you could get a better idea of speeds.

                                      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!

                                      T 1 Reply Last reply Reply Quote 0
                                      • JunkhackerJ
                                        Junkhacker Developer @george1421
                                        last edited by

                                        @george1421 i don’t think my setup is really that special. it’s a gigabit network with dell clients and a used Poweredge R510 we picked up cheap for the server (perc H700 raid controller with a 24 drive array, which is probably why i have the nice speed, tbh)

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                                        • Tom ElliottT
                                          Tom Elliott @Junkhacker
                                          last edited by

                                          @Junkhacker It also doesn’t hurt that many of your “receiving” systems have SSD’s lol.

                                          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

                                          JunkhackerJ 1 Reply Last reply Reply Quote 1
                                          • JunkhackerJ
                                            Junkhacker Developer @Tom Elliott
                                            last edited by Junkhacker

                                            @Tom-Elliott true, forgot about that. we only deploy traditional hard drives in special cases now. we find it’s more effective for us to put in an SSD than a faster processor for our users.

                                            point being, if someone had relatively small image storage requirements they could probably get as fast of results as i do by putting an SSD in their server.

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                                            george1421G 1 Reply Last reply Reply Quote 0
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