7 Replies Latest reply on Jul 26, 2006 1:24 PM by joepje

    Anyone Added CPUs to an Existing ESX box?

    taylorb Expert

      My boss wants to buy a proliant ml570 with only 2 processors and then add the other 2 processors next year when we have the budget.  Anyone else try this?   First off, can you run a 2cpu license on a 4 socket server (with only 2 cpus installed)?   Is there a software upgrade from 2 to 4 cpu license for ESX.  Can I add 2 cpus to an ESX box without reinstalling ESX?   If anyone has any experience with this, I'd love to hear from them.

        • 1. Re: Anyone Added CPUs to an Existing ESX box?
          mreferre Virtuoso

          Yes you can.

           

          >First off, can you run a 2cpu license on a 4 socket server (with only 2 >cpus installed)

           

          Yes.

           

          Is there a software upgrade from 2 to 4 cpu license for ESX

           

          Well you should ask your reseller ...... I am not keen to licensing barin storms...

           

           

          Can I add 2 cpus to an ESX box without reinstalling ESX

           

          Yes. Sit it down. Plug the new CPU's. Start it again. Insert the new 4-way CPU. Voila'.

           

          Massimo.

          • 2. Re: Anyone Added CPUs to an Existing ESX box?
            sbeaver Guru
            vExpertUser Moderators

            I just did this on a couple of boxes and piece of cake

            • 3. Re: Anyone Added CPUs to an Existing ESX box?
              dpomeroy Virtuoso

              ESX looks at home many CPUs are installed, not empty sockets, so you should be fine for licensing.

              After you put in the CPUs you will have to enter a new 4 CPU license, unless of course you have upgraded to VI3 and have the central licensing server running, then you will just add a 2 CPU license to the pool.

               

              The only problem with this plan is that the vendors charge a huge amount of $$$ for the additional CPUs and that price docent come down a year latter. So in terms of value for what you are paying you lose out because a year from now the same amount of money will buy better/faster CPUs, but from a licensing standpoint there are no issues.

              • 4. Re: Anyone Added CPUs to an Existing ESX box?
                taylorb Expert

                I agree, I say we just buy all 4 now, but my boss doesn't think we can spend any more than the 2 CPU box costs until next fiscal year. 

                 

                Thanks for your help!

                • 5. Re: Anyone Added CPUs to an Existing ESX box?
                  Chris_S_UK Expert

                  As others have said, ESX will just recognise it. I did this last week on a server.

                   

                  One thought, if you're planning to add CPUs, you probably planning to add more VMs too. If you're going to add more VMs, are you going to add more RAM too?

                   

                  If you're planning to add more VMs/CPUs/RAM at a later stage, you may want to increase the Console Os's memory from the default of 192mb. If you're going to do this, you'll need to increase the disk space allocated to the Console's swap file. Therefore, you should size the partition it goes on accordingly from the outset. I suggest sizing this at 1600mb from the start, which is twice the max 800mb assignable to the Console OS.

                   

                  Chris

                  • 6. Re: Anyone Added CPUs to an Existing ESX box?
                    Big T Novice

                    With a year lag in between,  you might end up with mixed steppings. Mixed steppings might work,  or it might not.  Something for further research.

                    • 7. Re: Anyone Added CPUs to an Existing ESX box?
                      joepje Expert

                      you can lookup the HP Product Bulletin (google for product bulletin) which can be downloaded from the HP site.

                       

                      here you can search the newest processor models for proliant servers. Be aware of the fact that processors should have the same stepping level etc...