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Not fully understanding storage numbers

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Hi

 

I've build a vCloud environment for internal use by our own consultants for testing and playing with new products. Since we don't need performance, I've enabled Fast Cloning and Thin Provisioning for the only OrgVDC in use and I'm very surprised by how soon vCloud starts complaining about not enough space available.

 

It "feels" as if always the full clones and full disk sizes are used in calculations instead of at least allowing a little over commitment of storage.

 

Let me show you all the layers:

 

VMFS info from vCloud admin page:

VMFS041 = Total Cap 1068GB - Used Cap 143GB - Available Cap  925GB - Provisioned Cap 638GB - Requested Storage 258GB

VMFS042 = Total Cap 2046GB - Used Cap 766GB - Available Cap 1280GB - Provisioned Cap 3713GB - Requested Storage 1668GB

VMFS043 = Total Cap 1023GB - Used Cap 104GB - Available Cap  919GB - Provisioned Cap 262GB - Requested Storage 239GB

These are combined into a storage profile named "Normal IO - R5"

The three datastores are 4137GB in total of which 1013GB is used.

 

At Org level, there is on OrgVDC-Consultants using the Pay-as-you-Go model. When i open the properties page of the OrgVDC-Consultant, I can see that the storage profile has an "unlimited allocation" and 2214GB used allocation. Thin Provisioning and Fast Provisioning have both been enabled.

 

Would seem rather healthy, using only 1013GB of 4137GB but still vCloud seems to have come to a halt. When trying to add a 2nd nic to an existing VM, I get this error:

 

 

There is no usable datastore.
Cannot use datastore (c8bccc19-074b-448c-94ed-9bac339b0a5e, datastore-40) since it exceeds the Threshold Red limit.
Cannot use datastore (c8bccc19-074b-448c-94ed-9bac339b0a5e, datastore-142) since it exceeds the Threshold Red limit.
Cannot use datastore (c8bccc19-074b-448c-94ed-9bac339b0a5e, datastore-143) since it exceeds the Threshold Red limit.
Cannot use datastore (c8bccc19-074b-448c-94ed-9bac339b0a5e, datastore-144) since it exceeds the Threshold Red limit.
Cannot use datastore [vcId=c8bccc19-074b-448c-94ed-9bac339b0a5e, moref=datastore-29] since it does not support storage profile Normal IO - R5.
Cannot use datastore [vcId=c8bccc19-074b-448c-94ed-9bac339b0a5e, moref=datastore-33] since it does not support storage profile Normal IO - R5.
Same happens when trying to deploy a new VM / vApp.
Few questions;
- Why are the thresholds over the red limit?
- How unlimited is unlimited? Because when I change it from Unlimited to a percentage, I can never go over 100%.
- Are Fast- and thin provisioned disks used in the calculations or are their thick sizes used for calculations?
- Why would even adding a vNIC to a VM complain about the datastores being over their threshold?
Regards
Gabrie

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