Q. What are the scalability changes in ESXi 6.0?
A. ESXi 6.0 offers a number of improvements to its scalability for the host and VMs (using the new hardware version 11). Below are the key changes.
| Limit | vSphere 5.5 | vSphere 6 | Improvement |
| Hosts per Cluster | 32 | 64 | 2x |
| VMs per Cluster | 4,000 | 8,000 | 2x |
| CPUs per Host | 320 | 480 | 1.5x |
| RAM per Host | 4 TB | 12 TB | 3x |
| VMs per Host | 512 | 1,024 | 2x |
| vCPUs per VM | 64 | 128 | 2x |
| Virtual RAM per VM | 1 TB | 4 TB | 4x |
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