We need to set the reservations for vSAN so that in case of a single host failure, we have enough reserved space in order to keep vSAN operational. There are two reservations that we need to enable, namely the and . You can find more details here.

We also need to set the space efficiency. We want to make sure that the space efficiency is . The reason is that Greenplum Database cluster already stores the data in columnar format and applies compression. There is no need for vSAN to compress it again. Also vSAN compression introduces higher latency for writes which will cause performance issues for data loading and query spilling.

Setting Up VMware vSphere Storage - 图2

VMware vSphere storage polices define storage requirements for the virtual machines. These policies determine how the virtual machine storage objects are provisioned and allocated within the datastore to guarantee the required level of service.

This section provides instructions for creating a VMware vSphere storage policy in a VMware vSphere environment where no level of encryption is required. To configure storage policies when encryption is used, see Setting Up VMware vSphere Encryption.

The following steps set up a VMware vSphere storage policy with no encryption for a four-host configuration using RAID1.

  2. Enter a Storage Policy name and optional description and click Next. This example uses vSAN Greenplum FTT1 RAID1 Stripe4 Thick No Encryption as the policy name.

  3. Under Policy structure, check the Enable rules for vSAN storage box.

  4. Under vSAN - Availability, select the RAID-1 mirroring vSAN policy. If you are using a different configuration, adjust this parameter accordingly.

    Setting Up VMware vSphere Storage - 图4

  5. Under vSAN - Advanced Policy Rules, specify 4 for Number of disk stripes per object, and Thick provisioning.

  6. Under Storage Compatibility, check that your vSAN storage is compatible with the storage policy.

    Setting Up VMware vSphere Storage - 图7

  7. Review the Summary page. It should look similar to this:

You have completed setting up Dell EMC VxRail with VMware vSphere. Proceed to Validating Dell EMC VxRail Setup Performance in order to verify network connectivity and test vSAN performance with HCIBench.