Provisioning Services High Availability Considerations – Part 3

In the previous Provisioning Services High Availability Considerations blog, I spoke about placing your vDisks on a Windows Network Share (CIFS). Now I will talk about placing your vDisks on a Network Attached Storage (NAS).

Placing your vDisks on a Network Attached Storage (NAS)

Using a single Network Attached Storage (NAS) to store the vDisks is an easy way of implementing a central vDisk store at moderate cost. This solution will enhanced reliability and give you a greater degree of scalability to support an increasing number of Target Devices.

What should we consider with this solution?

  • No redundancy for NAS outages (all PVS Target Devices stop responding).
  • Requires software to manage the storage array. RAID arrays must be configured on the storage array and assigned to each PVS Server.
  • I/O for vDisk input (loading from the share) and vDisk output (delivering to the Targed Devices) is handled by the same network link. This affects the overall performance of the solution.

What are the recommendations?

  • Network Interface Card (NIC) – Teaming should be used to increase the reliability and the I/O between PVS Servers, File Server and Target Devices.
  • Where feasible dedicated NICs should be used for loading the vDisks and for delivering the vDisks to the Target Devices.



    Elisabeth Teixeira. Follow me on Twitter:http://twitter.com/lizteixeira