[ MULTI-CLOUD EXPERTISE ] VMware vSAN Software-defined Storage.

VMWare vSAN is a software-defined storage product that is used with VMware ESXi hypervisor. VMWare vSAN reduces the cost and complexity that exists in traditional storage solutions by offering the capability of using policies and rules to manage storage. A vSphere cluster is the primary management unit for the VMware vSAN. You can create a vSphere cluster as either an all-flash cluster or hybrid vSAN. An all-flash vSAN uses flash storage technology to manage both cache and capacity tiers while a hybrid vSAN combines the flash and traditional spindles.

Within a cluster, there is one designated Master that is elected by all the nodes participating in that group. The role of a master is to extract Cluster Monitoring, Membership, and Directory Service (CMMDS) updates from all the nodes and distribute them to agents.