After you enable vSAN, a single datastore is created. You can review the capacity of the vSAN datastore.

Before you begin

Activate vSAN and configure disk groups.

About this task

Procedure

  1. Navigate to Storage in the vSphere Web Client.
  2. Select the vSAN datastore.
  3. Click the Configure tab.
  4. Review the vSAN datastore capacity.

    The size of the vSAN datastore depends on the number of capacity devices per ESXi host and the number of ESXi hosts in the cluster. For example, if a host has seven 2 TB for capacity devices, and the cluster includes eight hosts, the approximate storage capacity would be 7 x 2 TB x 8 = 112 TB. Note that when using the all-flash configuration, flash devices are used for capacity. For hybrid configuration, magnetic disks are used for capacity.

    Some capacity is allocated for metadata.

    • On-disk format version 1.0 adds approximately 1 GB per capacity device.

    • On-disk format version 2.0 adds capacity overhead, typically no more than 1-2 percent capacity per device.

    • On-disk format version 3.0 and later adds capacity overhead, typically no more than 1-2 percent capacity per device. Deduplication and compression with software checksum enabled require additional overhead of approximately 6.2 percent capacity per device.

What to do next

Use the storage capabilities of the vSAN datastore to create a storage policy for virtual machines. For information, see the vSphere Storage documentation.