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Real usage of the raw space from a tpvv
https://3parug.com/viewtopic.php?f=18&t=770		 Page 1 of 1
Author:  Luki [ Fri Jun 13, 2014 12:53 pm ]
Post subject:  Real usage of the raw space from a tpvv
Hello, 3par experts
I have one question.

How I can find out how much rawspace tpvv really use.
I have the following example for you.

I have create a tpvv LUN with 4000 GB
Under vSphere I create a vm with a vmdk with 3500 GB this also tp.
On this vmdk I write 2000 GB without something to delete.
The Managment Console show me as a reserved user space,
virtual space of 3700gb and Used user size is also 3700 GB. :shock:

vsphere shows the capacity properly right and with still 1500 GB free. :D

How I can find out how much storage space the VV physically (raw Space) on the 3par need :?:

Sorry for my bad English and many greetings from north Germany ;)
Lukas
Author:  Schmoog [ Fri Jun 13, 2014 1:00 pm ]
Post subject:  Re: Real usage of the raw space from a tpvv
Luki wrote:
Hello, 3par experts
I have one question.

How I can find out how much rawspace tpvv really use.
I have the following example for you.

I have create a tpvv LUN with 4000 GB
Under vSphere I create a vm with a vmdk with 3500 GB this also tp.
On this vmdk I write 2000 GB without something to delete.
The Managment Console show me as a reserved user space,
virtual space of 3700gb and Used user size is also 3700 GB. :shock:

vsphere shows the capacity properly right and with still 1500 GB free. :D

How I can find out how much storage space the VV physically (raw Space) on the 3par need :?:

Sorry for my bad English and many greetings from north Germany ;)
Lukas


Lukas,

To me it sounds like your VMDK's were created eager zeroed thick, and you don't have zero detect turned on.

Can you ensure that zero detect is turned on in your CPG?
Author:  Luki [ Fri Jun 13, 2014 2:22 pm ]
Post subject:  Re: Real usage of the raw space from a tpvv
Zero Detection is on.
And i'm 99% sure, the vmdk is tp.
I look Monday one more time and make some screenshots :D
Author:  Davidkn [ Fri Jun 13, 2014 4:25 pm ]
Post subject:  Re: Real usage of the raw space from a tpvv
Can you add the used user size column to the GUI and then see what that says?

rye just seeing the reserved size at the moment.
Author:  Luki [ Mon Jun 16, 2014 3:52 am ]
Post subject:  Re: Real usage of the raw space from a tpvv
So now i have some pics for you.

The vcenter show the free capacity corrective

http://www11.pic-upload.de/16.06.14/fexq27nw9p8b.jpg


The vmdk is thin provision

http://www11.pic-upload.de/16.06.14/yrltxyi3m4af.jpg


But the MC show the vv is full. :shock:
Zerodetect is on

http://www11.pic-upload.de/16.06.14/5yrxlx1jhi9.jpg


The System is a 7400 with 3.1.2 MU3, ESX 5.5
Author:  Davidkn [ Mon Jun 16, 2014 2:15 pm ]
Post subject:  Re: Real usage of the raw space from a tpvv
It's strange why the used space is bigger that the vmdk itself.

Two more things to check, can you browse the datastore and click on the folder of the vm to see how big each vmdk file is please, it will show the provisioned space and used space.

Finally, does the vm have any snapshots?

A common thing I see is people create a snapshot they forget about on a vm before they copy across a load of data, which would explain how it could be taking up more space than it should, but it wouldn't explain why vcenter would be displaying a larger amount of free space though.

Had this datastore ever contained anything else, or is it purely this newly created vmdk and nothing has been deleted?

If you have DO, maybe try moving it to a different cpg and back, or maybe converting to thick and then back to thin again?

Or create another volume and storage migrate the vmdk in vcenter and see if the same amount of space is taken up on the new vvol?
Author:  Luki [ Tue Jun 17, 2014 3:56 am ]
Post subject:  Re: Real usage of the raw space from a tpvv
Hi david,

thank you for the Tipps!
I Convert the vv from TP to FP and again to TP. But nothing changed.
I move the vm now to a new Datastore.

The VMDK files have the correct size.
The cpq for the VV have no DO.
Author:  Luki [ Wed Jun 18, 2014 2:44 am ]
Post subject:  Re: Real usage of the raw space from a tpvv
After moving to a new Datastore, show the MC the capacity correctly. :?
I delete the old vv now.
Author:  Davidkn [ Wed Jun 18, 2014 3:35 pm ]
Post subject:  Re: Real usage of the raw space from a tpvv
Interesting, might remain one of life's mysteries, but at least it's solved now.
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