Thursday, 14 July 2016

VMware VSAN Overview


  • A VMware Virtual SAN is a hybrid storage system that leverages and aggregates local solid-state drives (SSDs) as cache and local hard disk drives (HDDs) to provide a clustered datastore that can be utilized by virtual machines.
  • Virtual SAN is a distributed layer of Software running natively as part of ESXi.

  • Virtual San Virtualizes Local Physical Storage Resources of ESXi hosts and turns them into Pool of Storage.
  • VSAN can be created on New cluster or can also be enabled on existing cluster.
  • Host contributing its local storage to VSAN datastore it must provide at least one SSD and one HDD.
  • Hard Disks provides a persistent Storage capacity and SSD provides caching tier.
  • Virtual SAN requires A minimum of three ESXi hosts contributing local storage.
  • VMkernel Ports need to be created for Carrying VSAN traffic.
  • Using Virtual SAN in production environments requires a special license that you assign to the Virtual SAN clusters. The capacity of the license must cover the total number of CPUs in the cluster.
  • Depending on the disk group configuration in the cluster, you can assign one of two types of licenses: a license for hybrid configurations, and a license for hybrid and all-flash configurations.

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