The VMware vSAN maximums represents limits applicable for vSAN ESXi host, vSAN cluster, vSAN virtual machines, vSAN VM storage policy, and virtual networking.

Table 1. vSAN Maximums.

Item

Maximum

vSAN ESXi host

vSAN disk groups per host

5

Magnetic disks per disk group

7

SSD disks per disk group

1

Spinning disks in all diskgroups per host

35

Components per vSAN host

9000

Cache tier maximum devices per host

5

Capacity tier maximum devices per diskgroup

7

Capacity tier maximum devices

35

vSAN Cluster

Number of vSAN hosts in a cluster

64 (Hybrid) 64 (All-Flash)

Number of datastores per cluster

1

vSAN virtual machines

Virtual machines per host

200

Virtual machines per cluster

6000

Virtual machine virtual disk size

62 TB

Disk stripes per object

12

Percentage of flash read cache reservation

100

Failure to tolerate

3 for VM virtual disk size <= 16 TB

Percentage of object space reservation

100

vSAN networks/physical network fabrics

2

vSAN iSCSI Target

Number of iSCSI LUNs per Cluster

1024

Number of iSCSI Targets per Cluster

128

Number of iSCSI LUNs per Target

256

Max iSCSI LUN size

62 TB

Number of iSCSI sessions per Node

128

iSCSI IO queue depth per Node

4096

Number of outstanding writes per iSCSI LUN

128

Number of outstanding IOs per iSCSI LUN

256

Number of initiators who register PR key for a iSCSI LUN

64