May 24, 2015

vSphere Storage Terminologies - Datastore

vSphere Storage Terminologies - Datastore

Datastores are logical containers, analogous to file systems.

They hold virtual machine objects such as virtual disk files snapshot files, and other files necessary for virtual machine operation. They can exist on a variety of physical storage types and are accessed over different storage adapters (SCSI, iSCSI, RAID, Fibre Channel, Fibre Channel over Ethernet (FCoE), and Ethernet.).

Datastores hide specifics of each storage device and provide a uniform model for storing virtual machine files.


Ref: http://www.vmware.com/files/pdf/vmfs_resig.pdf

A datastore can be of the following types: VMFS, NFS, Virtual SAN and Virtual Volume (VVOL).

A Virtual SAN datastore “leverages storage resources from a number of ESXi hosts, which are part of a Virtual SAN cluster. The Virtual SAN datastore is used for virtual machine placement, and supports VMware features that require shared storage, such as HA, vMotion, and DRS."

At vSphere 6.0, the following datastore formats are available:
  • VMFS, NFS (version 3 or 4.1)
  • Virtual SAN, VVOL
Note: This also corresponds to the file system type that the datastore uses: VMFS, NFS, Virtual SAN and VVOL.


Ref:

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