View Linked Clones and With Storage Acceleration

[bisysadmin]

HI,

Before I had  even considered enabling storage acceleration in my vdi deployment I  noticed some strange or unexpected behaviour. As mentioned CBRC settings  were not enabled in View or vCenter but my recomposition tasks for my  linked clones would get stuck inthe customizing status. When checking  the logs I identified the following entries that led me to various posts about view vcenter user and the "Global > Act As VCenter Server":

[ServiceConnection25] VirtualCenter https://server.domain.net:443/sdk is currently unavailable - attempting to reconnect
2012-12-17T13:06:21.675-06:00 ERROR (12A0-13F0) <PendingOperation-vm-1925> [ServiceConnection25] Exceeded maximum number of VC reconnection attempts.
2012-12-17T13:06:21.675-06:00 ERROR (12A0-13F0) <PendingOperation-vm-1925> [ServiceConnection25] Permission to perform this operation was denied.
2012-12-17T13:06:21.675-06:00 ERROR (12A0-13F0) <PendingOperation-vm-1925> [VirtualCenterDriver] Problem configuring CBRC digests for VM /VAN1/vm/View POC Desktops/POOL1/myworkstation: com.vmware.vdi.vcsupport25.VmException25: Permission to perform this operation was denied.
2012-12-17T13:06:21.683-06:00 WARN  (12A0-0A7C) <PendingOperation-vm-1914> [ServiceConnection25] Problem while performing VC operation: 'Permission to perform this operation was denied.' [com.vmware.vim25.NoPermission]

Sure endough when I made this change, recomposition of my pool continued almost right away. The view client task pane showe the current at task as "Configure Virtual diks digest".

My question is if I am not why fould the recompose process attempt a CBRC digest operation when it is not enabled in both required operations. Is there some other feature apart from storage acceleration that requires the CBRC computation and the "Global > Act As VCenter Server" permissions that is not documented. [ I'm glad i came accross this as we will want to use it eventually but curiosity won't let my questions jus cause I'll be turning the feature on]:

Thanks for any understanding you can pass on.

[memaad]

Hi,

I have seen this issue before reported by one of the other user. From my understanding  you can ignore it. It is harmless.

Regards

Mohammed

[memaad]

HI,

Also what is status of vCenter server in VMware view administrator portal ?

Regards

Mohammed

[bisysadmin]

Thanks for the response. The only problem with me ignoring the issue is the part where the re-composition of my desktop pools gets stuck in the customizing phase unless I have given the view user Global > Act As vCenter Server access. If I don't do this the process does not complete so its hard to ignore.

[bisysadmin]

No issues with vCenter Server reported in the View Admin dashboard or logs.

[memaad]

Hi,

Ohh .... I think I missed that point about recompose failing without user privilege" Global > Act As vCenter Server access". From documentation

http://pubs.vmware.com/view-51/topic/com.vmware.ICbase/PDF/view-51-administration.pdf  ,we need  "Global > Act As vCenter Server access", Configure View Storage Accelerator (Host Caching) for vCenter Server.

If you are not using host caching , then we dont need Global > Act As vCenter Server access", for user.

Regards

Mohammed

[bisysadmin]

Yes I realize the need if we are using storage acceleration, but I am not using it and have not enabled it, but for some reason my recompose will only work if I have that permission set, otherwise it still stalls and logs the message below in the logs....

...[VirtualCenterDriver] Problem configuring CBRC digests...

If I had actually enable storage acceleration it would make sense but in this case this error and the need for the vCenter permission does not make sense.