Your Cloud Foundation system might be an all-flash storage environment. For all-flash storage, the software stack's vSAN space efficiency features enable you to reduce the amount of space for storing data in your workload domains.
As provided by the vSAN features installed in an all-flash environment, you can use these techniques to reduce the total storage capacity required to meet the needs in your workload domains:
You can enable deduplication and compression on a workload domain's underlying vSAN environment to eliminate duplicate data and reduce the amount of space needed to store data.
RAID 5 or RAID 6 erasure coding is a policy attribute in a workload domain's vSAN policy. Erasure coding can protect your data while using less storage space than the default RAID 1 mirroring. You set the Failure tolerance method in the vSAN policy to enable these features.
For detailed information about these vSAN space efficiency features, see the vSAN documentation at https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.virtualsan.doc/GUID-0D43429F-E2E7-4647-8ECA-8F606E9E910F.html. Specific topics about these features include:
Using Deduplication and Compression topic: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-3D2D80CC-444E-454E-9B8B-25C3F620EFED.html
Deduplication and Compression Design Considerations topic: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-2285B446-46BF-429C-A1E7-BEE276ED40F7.html
Using RAID 5 or RAID 6 Erasure Coding topic: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-AD408FA8-5898-4541-9F82-FE72E6CD6227.html. As described in that topic, RAID 5 or RAID 6 erasure coding enables vSAN to tolerate the failure of up to two capacity devices in the datastore. You can configure RAID 5 on all-flash vSAN environments having four or more fault domains. You can configure RAID 5 or RAID 6 on all-flash vSAN environments having six or more fault domains.
RAID 5 or RAID 6 Design Considerations: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-6D818555-8DE8-4F06-9498-66903FB9C775.html
The Edit vSAN Settings topic includes the detailed steps for enabling deduplication and compression: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-FF1AE93F-817A-4894-9A38-EB474AA754F1.html
The Expanding vSAN Cluster Capacity and Performance topic describes how to extend vSAN disk groups: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-41F8B336-D937-498E-AE87-94953A66DF00.html
You enable these features on a workload domain's underlying environment by using the vSphere Web Client to edit the vSAN settings.
Prerequisites
Enable the deduplication and compression features on a workload domain after the workload domain creation process is successfully completed.