VMware vSphere ESX 6.5 and vCenter 6.5 Configuration Maximums
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The following listings are a comprehensive collection of configuration maximums from VMware products.
Virtual Machine Maximums
Host Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5 | ESX 4.1 | ESX 4.0 | ESX 3.5 | ESX 3 | ESX 2 | ESX 1 |
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| Logical CPUs per host | 576 | 480 | 320 | 160 | 160 | 160 | 64 | 32 | 32 | 16 | 8 |
| Virtual machines per host | 1024 | 1024 | 512 | 512 | 512 | 320 | 320 | 128 | 128 | 80 | 64 |
| Virtual CPUs per host | 4096 | 4096 | 4096 | 2048 | 2048 | 512 | 512 | 128 | 128 | 80 | 64 |
| Virtual CPUs per core | 32 | 32 | 32 | 25 | 25 | 25 | 20 | 8 | 8 | 8 | 8 |
| RAM per host | 12TB | 12TB | 4TB | 2TB | 2TB | 1TB | 1TB | 256GB | 256GB | 64GB | 64GB |
| LUNs per server | 512 | 256 | 256 | 256 | 256 | 256 | 256 |
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vCenter Server Maximums
| vCenter Server Maximums | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5 | ESX 4.1 | ESX 4.0 | ESX 3.5 | ESX 3 |
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| Hosts per vCenter Server | 2000 | 1000 | 1000 | 1000 | 1000 | 1000 | 300 | 200 | 200 |
| Powered on virtual machines | 25000 | 10000 | 10000 | 10000 | 10000 | 10000 | 3000 | 2000 |
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| Registered virtual machines | 35000 | 15000 | 15000 | 15000 | 15000 | 15000 | 4500 | 2000 |
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| Linked vCenter Servers | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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| Hosts in linked vCenter Servers | 4000 | 4000 | 3000 | 3000 | 3000 | 3000 | 1000 |
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| Powered on virtual machines in linked vCenter | 30000 | 30000 | 30000 | 30000 | 30000 | 30000 | 10000 |
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| Registered virtual machines in linked vCenter | 50000 | 50000 | 50000 | 50000 | 50000 | 50000 | 15000 |
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| Concurrent Client connections | 60 | 180 | 100 | 100 | 100 | 100 | 30 |
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| Number of host per datacenter | 2000 | 500 | 500 | 500 | 500 | 400 | 100 |
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| MAC addresses per vCenter Server | 65536 | 65536 | 65536 | 65536 | 65536 |
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| USB devices connected at vSphere Client |
| 20 | 20 | 20 | 20 |
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Cluster and Resource Pool Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5 | ESX 4.1 | ESX 4.0 | ESX 3.5 |
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| Hosts per cluster | 64 | 64 | 32 | 32 | 32 | 32 | 32 | 32 |
| Virtual machines per cluster | 8000 | 4000 | 4000 | 4000 | 3000 | 3000 | 1280 |
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| Virtual machines per host | 1024 | 1024 | 512 | 512 | 512 | 320 | 100 |
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| Maximum concurrent host HA failover |
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| 32 | 32 | 4 | 4 |
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| Failover as percentage of cluster |
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| 100% | 100% | 50% | 50% |
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| Resource pools per cluster | 1600 | 1600 | 1600 | 1600 | 1600 | 512 | 512 | 128 |
| Resource pools per host | 1600 | 1600 | 1600 | 1600 | 1600 |
| 4096 |
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| Children per resource pool | 1100 | 1100 | 1024 | 1024 | 1024 | 1024 |
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| Resource pool tree depth | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 12 |
Network Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5 | ESX 4.1 | ESX 4.0 | ESX 3.5 | ESX 3 |
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| Total virtual network switch ports per host | 4096 | 4096 | 4096 | 4096 | 4096 | 4096 | 4096 | 127 |
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| Maximum active ports per host | 1016 | 1016 | 1016 | 1050 | 1016 | 1016 | 1016 | 1016 |
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| Virtual network switch creation ports | 4088 | 4088 | 4088 | 4088 | 4088 | 4088 | 4088 |
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| Port groups | 512 | 512 | 512 | 256 | 256 | 512 | 512 | 512 |
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| Distributed virtual network switch ports per vCenter | 60000 | 60000 | 60000 | 60000 | 30000 | 20000 | 6000 |
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| Static port groups per vCenter | 10000 | 10000 | 10000 | 10000 | 5000 | 5000 | 512 |
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| Ephemeral port groups per vCenter | 1016 | 1016 | 1016 | 256 | 256 | 1016 |
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| Hosts per distributed switch | 2000 | 1000 | 500 | 500 | 350 | 350 | 64 |
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| Distributed switches per vCenter | 128 | 128 | 128 | 128 | 32 | 32 | 16 |
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| VMDirectPath PCI/PCIe devices per host | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
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| VMDirectPath PCI/PCIe devices per virtual machine | 4 | 4 | 4 | 4 | 4 | 4 |
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| Concurrent vMotion operations per host (1Gb/s network) | 4 | 4 | 4 | 4 | 4 | 2 | 2 |
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| Concurrent vMotion operations per host (10Gb/s network) | 8 | 8 | 8 | 8 | 8 |
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Storage Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5 | ESX 4.1 | ESX 4.0 | ESX 3.5 | ESX 3 |
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| Software iSCSI NICs per server | 8 | 8 | 8 | 8 | 8 | 8 |
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| Number of total paths on a server | 2048 | 1024 | 1024 | 1024 | 1024 | 1024 |
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| Number of paths to a iSCSI LUN | 8 | 8 | 8 | 8 | 8 | 8 |
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| Software iSCSI targets | 256 | 256 | 256 | 256 | 256 | 256 | 256 |
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| NFS mounts per host | 256 | 256 | 256 | 256 | 256 | 64 | 64 |
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| FC LUNs per host | 512 | 256 | 256 | 256 | 256 | 256 | 256 | 256 | 256 |
| FC LUN ID | 16383 | 1023 | 255 | 255 | 255 | 255 | 255 | 255 | 255 |
| FC Number of paths to a LUN | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Number of HBAs of any type | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
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| HBA ports | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
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| Targets per HBA | 256 | 256 | 256 | 256 | 256 | 256 | 256 | 15 |
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| Software FCoE adapters | 4 | 4 | 4 | 4 | 4 |
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| Volumes per host | 512 | 256 | 256 | 256 | 256 | 256 | 256 | 256 |
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| Hosts per volume | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 32 |
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| Powered on virtual machines per VMFS volume | 2048 | 2048 | 2048 | 2048 | 2048 |
| 256 |
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| Concurrent vMotion operations per datastore | 128 | 128 | 128 | 128 | 128 |
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| Concurrent Storage vMotion operations per datastore | 8 | 8 | 8 | 8 | 8 |
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| Concurrent Storage vMotion operations per host | 2 | 2 | 2 | 2 | 2 |
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| Concurrent non vMotion provisioning operations per host | 8 | 8 | 8 | 8 | 8 |
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| VMFS Volume size | 64TB | 64TB | 64TB | 64TB | 64TB | 64TB | 64TB | 64TB |
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| Virtual disks per datastore cluster | 9000 | 9000 | 9000 |
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| Datastores per datastore cluster | 64 | 64 | 64 |
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| Datastore clusters per vCenter | 256 | 256 | 256 |
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Fault Tolerance Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 | ESX 5.1 | ESX 5.0 |
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| Virtual disks | 16 | 16 | 16 | 16 |
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| Virtual CPUs per virtual machine | 4 | 4 | 1 | 1 | 1 |
| RAM per FT VM | 64 GB | 64GB | 64GB | 64GB | 64GB |
| Virtual machines per host | 4 | 4 | 4 | 4 | 4 |
Virtual SAN Maximums
| | ESX 6.5 | ESX 6.0 | ESX 5.5 |
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| Virtual SAN disk groups per host | 5 | 5 | 5 |
| Magnetic disks per disk group | 7 | 7 | 7 |
| SSD disks per disk group | 1 | 1 | 1 |
| Spinning disks in all diskgroups per host | 35 | 35 | 35 |
| Components per Virtual SAN host | 9000 | 9000 | 3000 |
| Number of Virtual SAN nodes in a cluster | 64 | 64 | 32 |
| Number of Virtual SAN nodes in a cluster (All-Flash) | 32 |
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| Number of datastores per cluster | 1 | 1 | 1 |
| Virtual machines per host | 200 | 200 | 100 |
| Virtual machines per cluster | 6000 | 6400 | 3200 |
| Virtual machine virtual disk size | 62TB | 62TB | 2032GB |
| Disk stripes per object | 12 | 12 | 12 |
| Percentage of flash read cache reservation | 100 | 100 | 100 |
| Failure to tolerate | 3 | 3 | 3 |
| Percentage of object space reservation | 100 | 100 | 100 |
| Virtual SAN networks/physical network fabrics | 2 | 2 | 2 |
