vSphere 6 – Scalability

Yesterday the new VMware vSphere was annunced. New version (6.0)  increase all configuration maximums that were introduce with version 5.5.

ESXi 6.0

Compared with previous versions, we have another big increase of the limits. In the following table there are some question marks since the official Configuration Maximums documents has not yet released. For each ESXi the new limits are:

vSphere 4.0 vSphere 4.1 vSphere 5.0 vSphere 5.1 vSphere 5.5 vSphere 6.0
Logical CPU 64 160 160 160 320 480
Physical RAM 1 TB 1 TB 2 TB 2 TB 4 TB 12 TB
NUMA Nodes 8 nodes 8 nodes 16 nodes ?
Virtual CPU 512 512 2048 2048 4096 ?
Virtual Machines 320 320 512 512 512 1000

The maximum physical CPUs of ESXi 6.0 will dependent on available hardware. It’s used the logical CPU concept to consider also cores and hyper-threading.

Virtual Machine Virtual Hardware (vHW 11)

Per ogni VM con il nuovo virtual hardware questi sono i relativi limitiFor each virtual machines those are the new limits:

vSphere 4.0 vSphere 4.1 vSphere 5.0 vSphere 5.1 vSphere 5.5 vSphere 6.0
Virtual CPU 8 8 32 64 64 128
Virtual RAM 255 GB 255 GB 1 TB 1 TB 1 TB 4 TB
Max VMDK size 2 TB – 512 B 2 TB – 512 B 2 TB – 512 B 2 TB – 512 B 62 TB ?
Virtual SCSI target 60 60 60 60 60 ?
Virtual NICs 10 10 10 10 10 ?

The guest memory can reach 4 TB RAM to 12 TB RAM depending on partner. VMs will also add those features:

  • Hot-add RAM now vNUMA aware
  • Increased support for virtual graphics including Nvidia vGPU
  • WDDM 1.1 GDI acceleration features
  • xHCI 1.0 controller compatible with OS X 10.8+ xHCI driver
  • Serial and parallel port enhancements:a virtual machine can now have a maximum of 32 serial ports and serial and parallel ports can now be removed

vCenter Server 6.0

The new vCenter Server maximums are:

vSphere 4.0 vSphere 4.1 vSphere 5.0 vSphere 5.1 vSphere 5.5 vSphere 6.0
Hosts per vCenter 300 1000 1000 1000 1000 1000
Hosts per datacenter 100 400 500 500 500 ?
Hosts per cluster 32 32 32 32 32 64
VMs per cluster 1280 3000 3000 4000 4000 8000
Powered on VMs 3000 10000 10000 10000 10000 10000
Registered VMs 4500 15000 15000 15000 15000 ?
Linked vCenter Servers 10 10 10 10 10 10

The maximum VM number depends on the usega of linked mode: with this feature in vSphere 5.5 the numbers were increased to 30,000 and 50,000 (probably we will have the same in 6.0).

Now the vCSA version have the same limits of the Windows installable version.

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