IOPS Limit – vSAN & Virtual Hard Disk

Jeff Wong
Occasionally, I will have a technical conversation with a customer on IOPS limit so rather than repeating myself, I thought I should document it here for everyone’s benefit. Cormac Hogan had written up a good introduction to vSAN IOPS Limit storage policy that was introduced back in vSAN 6.2. Beyond, the feature, I thought I should illustrate IOPS limit in action and highlight use cases when you would potentially want to use it.

Aligning vSAN Disk Group with Physical Setup

Jeff Wong
When designing a vSAN host, one of the consideration to increase availability is by having multiple disk groups and multiple IO controllers within a host. The obvious benefit to this would be to reduce the impact in when a disk or IO controller fails. When a decision is made to use multiple IO controllers to drive disk groups within a vSAN host, it is important that the failure domain of such configuration is aligned with the physical setup.

No Disks to Claim for vSAN?

Jeff Wong
Every so often, I will see someone hitting a speed bump setting up a disk group for vSAN. The case is the same when setting up for build your own vSAN using the disk claim wizard or VMware Cloud Foundation bring up. I thought I would do a quick write up to set it straight and point out some things to watch out for and different ways to overcome this.

New Beginnings

Jeff Wong
The Move It is now 2019 and a new chapter in my life begins. For those who know me, I had made a decision to move to the US to continue my career within the virtualization architecture space. From January 2019, I will continue my role in the VMware Advanced Customer Engagement (ACE) team (formerly Customer Success) as a Staff Architect focusing on VMware’s Core & Hyper Converged Infrastructure (HCI) solutions.