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This blog has been created to share technical information, interesting innovations that I notice on daily basis and Architectural/Consulting overview of various technologies. My areas of interest, on which I would be blogging, are VMware, Microsoft and Citrix Technologies. I hope you will enjoy this blog and share your experience with me.

Default VM Storage Policies (View Auto Created) for Horizon View 6 and VSAN


I love VSAN! Horizon View 6 and VSAN are like a marriage made in heaven, if you create Linked Clone or Full Clone desktops in View 6.0 using VSAN. It automatically adds the default Virtual Machine (VM) Storage Policies to the objects that are created during the desktop pool creation using View Administrator. The objects that get created using the desktop pool creation such as Persistent Disk, Replica Disk etc. automatically add the disk stripe, Flash cache and fault tolerance to each object.
What does that mean? Out of the box, your desktop objects are made highly available and one doesn't have to go to individual desktops and set VM Storage policies. The following table outlines the View Auto Created out-of-the-box VM Storage Policies available with Horizon View 6 and VSAN:
Default VM Storage Policies
No. Disk stripes per object
Flash read cache reservation (%)
No. Failures to tolerate
Object space reservation (%)
Desktop Type
VM_HOME_ <GUID>
1
0
1
0
Linked Clone/Full Clone
OS_DISK_ <GUID>
1
0
1
0
Dedicated Linked Clone
REPLICA_DISK_ <GUID>
1
10
1
0
Linked Clone
Persistent Disk_ <GUID>
1
0
1
100
Linked Clone/Full Clone
FULL_CLONE_DISK_FLOATING_ <GUID>
1
0
0
100
Floating Full Clone
FULL_CLONE_DISK_ <GUID>
1
0
1
100
Dedicated Full Clone
OS_DISK_FLOATING_ <GUID>
1
0
0
0
Floating Linked Clone
More Details:
VM_HOME – The folder which contains the virtual machine configuration files, such as .vmx, .vmsd, and .nvram.
OS_Disk – Linked Clone Dedicated/Persistent desktop pools
OS_DISK_FLOATING – Linked Clone Floating/Non-persistent desktop pools
REPLICA_DISK - A replica of the parent VM is created and stored on 1 per LUN basis from which the LC desktops are created
Persistent Disk - The User Persistent disk that redirects the user profile and user data to D: drive
_ <GUID> - The GUID seen at the end of the default policy is a cluster GUID for a view deployment. The policies can be shared amongst multiple pools within a single view deployment.
Number of Failures to Tolerate (FTT) - Defines the number of hosts, disk, or network failures a storage object can tolerate. For n failures tolerated, n+1 copies of the object are created and 2n+1 hosts that contribute storage are required.
Number of Disk Stripes Per Object - The number of HDDs across which each replica of a virtual machine object is striped. A value higher than 1 might result in better performance, but also results in a higher use of system resources.
I hope this information helps. Feel free to post your comments down below.
Best Regards,
Aresh Sarkari

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