vSAN Component Limit per Cluster

Products

• VMware vSAN

Issue/Introduction

vSAN objects and components

vSAN stores and manages data in the form of flexible data containers called objects. An object is a logical volume that has its data and metadata distributed across the cluster. For example, every VMDK is an object, as is every snapshot. Each vSAN object is composed of a set of components, determined by capabilities that are in use in the VM Storage Policy. When you provision a virtual machine on a vSAN datastore, vSAN creates a set of objects comprised of multiple components for each virtual disk.

To know more about vSAN objects and components, see vSAN Terms and Definitions.

You can find the total number of vSAN components in use from Cluster > Monitor > vSAN Health Service > Capacity Utilization > Component
Or in later versions of vSphere from Cluster > Monitor > Skyline Health > Capacity utilization > Component

Resolution

The maximum number of components per cluster is shown as the max number of components per host, which is 9,000, multiplied by the number of hosts in the cluster. vSAN also recommends a maximum recommended component limit per cluster. The current limit for the maximum number of components for vSAN OSA clusters is 288,000. vSAN does not recommend exceeding this component limit.

For vSAN ESA clusters the maximum number of components per host is 27,000. See Monitoring and Management of vSAN Object Components for more details.