[VMConAWS] Support for Thick provisioned eager zeroed disk type in VMC using vSAN

Products

• VMware Cloud on AWS

Issue/Introduction

Symptoms:
The default disk provisioning type in vSAN is 'Thin'. EZT is being moved away from and is only available on-premises environments using VMFS as storage. VMFS is not used in VMC as a storage type to store Virtual Machines.

Resolution

While creating a Virtual Machine or initiating a migration, Please set the Object Space Reservation(OSR) to 100% in the storage policy using Thin provisioning as the VMDK instead of EZT. This will ensure 100% of space configured for the VMDK, but the underlying vmdk structure remains the same as it is in the Thin provisioning

Additional Information

https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/com.vmware.vsphere.vmc-aws-manage-data-center-vms.doc/GUID-EDBB551B-51B0-421B-9C44-6ECB66ED660B.html
 
https://blogs.vmware.com/virtualblocks/2020/11/16/thick-vs-thin-on-vsan-2020-edition/

Impact/Risks:
Unable to use EZT disk format in vSAN policies.