Storage-sizing formulas can help you estimate the size of linked-clone disks relative to the free space on the datastores that you select for OS disks, View Composer persistent disks, and replicas.

Storage Sizing Formulas

1 shows the formulas that calculate the estimated sizes of linked-clone disks when you create a pool and as the linked-clone machines grow over time. These formulas include the space for replica disks that are stored with the clones on the datastore.

If you edit an existing pool or store replicas on a separate datastore, View uses a different sizing formula. See Sizing Formulas for Creating Linked Clones When You Edit a Pool or Store Replicas on a Separate Datastore.

Table 1. Storage Sizing Formulas for Linked-Clone Disks on Selected Datastores

Data Type

Selected Free Space (GB)

Min Recommended (GB)

50% Utilization (GB)

Max Recommended (GB)

OS disks

Free space on the selected datastores

Number of VMs * (2 * memory of VM) + (2 * replica disk)

Number of VMs * (50% of replica disk + memory of VM) + (2 * replica disk)

Number of VMs * (100% of replica disk + memory of VM) + (2 * replica disk)

Persistent disks

Free space on the selected datastores

Number of VMs * 20% of persistent disk

Number of VMs * 50% of persistent disk

Number of VMs * 100% of persistent disk

Example of a Storage Sizing Estimate

In this example, the parent virtual machine is configured with 1GB of memory. The parent virtual machine's disk size is 10GB. A linked-clone pool is created with 10 machines. Persistent disks are configured as 2048MB in size.

The OS disks are configured on a datastore that currently has 184.23GB of available space. The persistent disks are configured on a different datastore with 28.56GB of available space.

2 shows how the sizing formulas calculate estimated storage requirements for the sample linked-clone desktop pool.

Table 2. Example of a Sizing Estimate for Linked-Clone Disks Deployed on Selected Datastores

Data Type

Selected Free Space (GB)

Min Recommended (GB)

50% Utilization (GB)

Max Recommended (GB)

OS disks

184.23

10 * (2*1GB) + (2*10GB) =

40.00

10 * (50% of 10GB + 1GB) + (2*10GB) =

80.00

10 * (100% of 10GB + 1GB) + (2*10GB) =

130.00

Persistent disks

28.56

10 * (20% of 2GB) =

4.00

10 * (50% of 2GB) =

10.00

10 * (100% of 2GB) =

20.00