8 Replies Latest reply on Jul 10, 2007 8:36 AM by Luciano Patrao

    Moving VM between Storage very Slow

    Luciano Patrao Hot Shot
    vExpert

      Hi

       

      When i move a virtual machine between storage(LUNs) is very, very slow.

       

      Example: One Virtual machine with 3 hard disks. The VM configuration is in the local storage, the System Operation Disk is in another storage(LUN), and the third and data disk in a third Storage(LUN).

       

      When i moved from the VMware 1 to the Vmware 2(with HA and DRS enable), it takes 3 hours to complete.

       

      My question is, is this normal? Take so long to move(or clone) from one VMWare(and storage) to another VMware(and storage)?

       

      Thank you

       

      Jail

        • 1. Re: Moving VM between Storage very Slow
          AustinPowers Hot Shot

          Do you mean moving a VM's datastores from one LUN to another?  If so, it is entirely dependent on the size of the datastores.  If you are moving hundreds of GB, then it can take a while.

           

          If you are talking about moving a VM from one host to another, it should only take a few minutes to move the local files; nothing else should have to move if the VMs are in the same HA group.

          • 2. Re: Moving VM between Storage very Slow
            Luciano Patrao Hot Shot
            vExpert

            Hi AustinPowers

             

            Thank for your reply

             

            My test was moving a Virtual Machine and all is hard disks from one Vmware to another VMware.

             

            But since i have 2 storage(LUN) for hitch VMware.

             

            Example:

            VMware Server 1 use LUN1 and LUN2 to store all Virtual Machines and Hard Disk

            VMware Server 3 use LUN3 and LUN4 to store all Virtual Machines and Hard Disk Data Files.

             

            Since when i move one VM from one VMware to another, it also change from LUN1 or LUN2 to LUN3 and LUN4

             

            The amount of Gb depends on the Hard Disk. But is something like 40Gb for hitch Hard Disk.

             

            So in my test i moved the VM and 3 Hard Disk(storage) that have about 35Gb30Gb50Gb = 115Gb and take about 3/4 hours

             

            Is it normal?

             

            Thank You

             

            Jail

            • 3. Re: Moving VM between Storage very Slow
              christianZ Virtuoso

              As above - by cold migration you should see e.g.  30MB/sek, vmotion runs not more as few minutes.

               

              What storage here?

              • 4. Re: Moving VM between Storage very Slow
                Luciano Patrao Hot Shot
                vExpert

                Hi

                 

                Storage:

                 

                Storage Solution Dell-EMC CX3-20 FC4 SPE

                   

                • 2xSPE to DAE Cable

                   

                • 2x2M Optical Cable SPE to DAE

                   

                • 15 x 300Gb FC2 HD 10k EMC

                 

                Its better to do this kind off move/clone with vmotion?

                 

                Jail

                • 5. Re: Moving VM between Storage very Slow
                  AustinPowers Hot Shot

                  That is about 2.5GB/min.  That's probably a reasonable throughput rate, but there are a lot of things that affect the speed you get.  Are all components GB speed from source to target?  What else is on the subnet that may be impacting? Do you have multiple physical NICs bonded to widen the pipe?  Are other VMs on the hosts using a lot of resources and slowing the move down?

                  • 6. Re: Moving VM between Storage very Slow
                    christianZ Virtuoso

                    The performance is ok for me,

                    vmotion won't move  your vm's files - only by running vms, moves only ram.

                    • 7. Re: Moving VM between Storage very Slow
                      Luciano Patrao Hot Shot
                      vExpert

                      Hi

                       

                      I have only one VM at this point. And all NIC are GB and the rest is FC

                       

                      I have restarted the Virtual Center, and both VMware

                       

                      On start i have this error on both VMware server

                       

                      0:00:01:54:261 CPU4:1046) LUN VMHBA0:0:0:1 May be snapshot: Disabling Acess: See resignaturing solution in san guide

                       

                      Are the LUN with a conflict between the VMware servers?

                       

                      I have created a RAID 5 Group(with hot spare) with 5 disks, and inside i created 2 LUN. One for the VMware 1 and other for VMware 2. This is LUNs for VM Operations System.

                       

                      I have created also a RAID 5 Group(with hot spare) with the rest of the disks, and inside i created 2 LUN. One for the VMware 1 and other for VMware 2. This is LUNs for VM Hard Disk Data

                       

                      Is this the problem? Must i create a RAID(LUN) only for one VMware Server? And do not mix together the LUN between the VMware Servers?

                       

                      Thank You for your support

                       

                      Jail

                      • 8. Re: Moving VM between Storage very Slow
                        Luciano Patrao Hot Shot
                        vExpert

                        Hi

                         

                        I have delete all my LUN recreate more LUN and have no problems now

                         

                        Thank You for your support

                         

                        Jail