VMware vSAN is a software-defined storage (SDS) product developed by VMware .vSAN pools together direct-attached storage devices and create a distributed, shared storage across vSphere cluster . The user defines the storage requirements, such as performance and availability, for virtual machines (VMs) on a VMware vSAN cluster and vSAN ensures that these policies are administered and maintained.
vSAN supports both hybrid and all-flash configurations using a two-tier architecture. Both configurations use a caching tier and a capacity tier. vSAN create a shared data store by combining the host’s storage resources into a single, high-performance and it can be used by all hosts in the cluster .
Caching Tier :- It composed of at least one flash device per host.
Capacity Tier :- It is composed of at least one flash device (for all-flash) or one magnetic disk (for hybrid) per host.
Now a days VMware vSAN is part of hyper-converged infrastructure offering, which includes vSphere and vCenter. Several hardware vendors sell integrated appliances that come preinstalled with vSAN and offer full support for the integrated appliance.
Introduction to VMware vSAN
License Editions
vSAN license editions include Standard, Advanced, Enterprise, and Remote Office/Branch Office (ROBO) Standard, Advanced, and Enterprise. The following table shows the features included with each license edition.
Few Points about vSAN Licensing