Thin Provision Metrix

[godaba]

how will the thin provision disks will be calculated.

if we allocated a Datastore with 1 TB and under the Datastore, if we have 1 TB VM's.

Total how much disk will we get as thin provision. ( 1 TB disk served for 20 TB in thin provision).

[daphnissov]

Not entirely sure I understand the question you're trying to ask. Let me put it this way:  Thin provisioned disks only consume space as data is written inside of the VM. So if you have a VM which you have allocated a 1 TB drive, but you only consume 20 GB of that disk, then the resulting VMDK will end up being about 20 GB consumed of your datastore space.

[pwilk]

Thin provisioned disks will occupy the amount of space on the datastore equal to* the amount of data stored on the virtual disk on the guest OS level. If your virtual disk is thin provisioned and has a basic (10GB) Windows installation on it, then it will occupy 10GB of space on the datastore.

*plus of course some minimal amount of VMware operation files which we can generally ignore

[godaba]

Know about this, here 1 TB datastore, provisioned till how much space?

[daphnissov]

I'm sorry, I don't understand your question.

[pwilk]

The disk will be filled up once the total of all thinly provisioned disks reaches 1TB. You can create even 1000 thinly provisioned disks and they are going to work just fine on 1TB datastore as long as you don't actually STORE over 1TB of files on them.

Once again, you can allocate more than 1TB of space to as many virtual, thinly provisioned disks as you want, however you won't be able to store anything more than 1TB of actual data. Once you reach 1TB of data across all your thinly provisioned disks, your datastore will be filled up.

Did that answer your question? It's not the easiest task to understand what you're asking about - sorry.