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What is your average provisioned VM size?

Poll ended at May 05, 2014 1:29 pm

Less than 20 GB
0
No votes
20 GB
1
1%
50 GB
15
21%
100 GB
27
38%
200 GB
19
26%
500 GB
4
6%
More than 500 GB
6
8%
 
Total votes: 72

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[POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 1:29 pm

Please help us to estimate average provisioned VM size within our customer base. The goal here is to find out what is the maximum size threshold for the majority of VMs out there (not counting exceptions). We need to understand this for planning around one new technology we are developing. Thank you for your help!

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Re: [POLL] What is your average VM size?

Post by averylarry » Apr 07, 2014 3:09 pm

Used or Provisioned?
Including the main backup repository?

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Re: [POLL] What is your average VM size?

Post by averylarry » Apr 07, 2014 3:17 pm

Wouldn't mean or some type of weighted average help more? Most of my VMs are under 200Gb provisioned, but I have 2 VMs that are just huge.

Maybe a straight count would work better. How many VMs do you have that are:
under 20
20-49
50-99
...

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Re: [POLL] What is your average VM size?

Post by Vitaliy S. » Apr 07, 2014 3:41 pm

averylarry wrote:Used or Provisioned?
Including the main backup repository?
I don't think it matters, just the average size of the VM. Is your repository also a VM? You can include that as well, we just want to understand the general distribution of disks size.
averylarry wrote:Wouldn't mean or some type of weighted average help more? Most of my VMs are under 200Gb provisioned, but I have 2 VMs that are just huge.
You can skip these two VMs, and vote for 100 or 200 then.

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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 3:48 pm

Please vote excluding the Veeam backup repository VM (and it is a bad practice anyway to store backups withing VMFS) :wink:

Between used or provisioned, I'd say I am after provisioned here, because this tells me how big do you expect the VM to grow in worst-case scenario. I have updated the poll description.

And yes, I am after the majority of your VMs. I realize there will be exceptions, in fact our IT has just informed me we have our own "exceptional" 6TB VM, but all the rest are pretty similar and quite small. Their average size is the value I am after.

Thank you!

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Re: [POLL] What is your average VM size?

Post by averylarry » Apr 07, 2014 4:02 pm

Sounds like you care about virtual disks sizes.

I have a lot of 50Gb virtual disks for OS/boot drives, and a bunch of 50-250Gb data disks. Then there are a few outliers.

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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 7:15 pm

No, actually total VM size is what I am looking (sum of provisioned across all disks).
By the way, if anyone has voted incorrectly, I have enabled ability to change your vote.

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Re: [POLL] What is your average VM size?

Post by dellock6 » Apr 07, 2014 9:02 pm

Anton, just as an additional source for informations, there is this nice project that is collecting real values submitted by 300 users:

http://dash.vopendata.org/

Average size there is 73 GB (click on VMDK in upper right to see details on that statistics).

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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 9:50 pm

I've seen that, but this provides average VMDK size, not average VM size (VMs usually have multiple VMDKs).

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Re: [POLL] What is your average VM size?

Post by emachabert » Apr 07, 2014 9:53 pm 2 people like this post

Hi,

I took one hour to connect to multiple infrastructures, select the virtual machines view for each Datacenter, then export to Excel, and then Excel does the magic:
Over 2347 VM I have this average VM size (allocated): 103,0441767 GB

hope this helps
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Re: [POLL] What is your average VM size?

Post by dellock6 » Apr 07, 2014 9:55 pm

I'll do the math for you Anton ;)

671 vmdks per vCenter and 415 VMs per vCenter = 1,6168 VMDKs per VM = 73,19 GB per VMDK = 118,333592 GB per VM

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Re: [POLL] What is your average VM size?

Post by emachabert » Apr 07, 2014 9:56 pm 1 person likes this post

I removed every VM that was over 1TB
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Re: [POLL] What is your average VM size?

Post by emachabert » Apr 07, 2014 10:00 pm

Luca,

these numbers are very close of what I see, I used RVtools on three vcenter cumulating 750VMs, using the vDisk tab I've got an average vmdk size of 73,28GB :D (we are in the matrix)
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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 10:01 pm

emachabert wrote:I removed every VM that was over 1TB
Out of curiosity, how many of those do you have?
And thanks for your scientific approach ;)

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Re: [POLL] What is your average VM size?

Post by dellock6 » Apr 07, 2014 10:04 pm 1 person likes this post

Eric,
well that site is polling a large number of VMs, so it's expected any infrastructure is near that number.
As an example, when talking about sizing with Tom Sightler for example, we both use 100 GB as a "rule of thumb" in VM size. It's also really an easy number to be used :)

Oh, and there is a trend in it, when that site first started more than a year ago, average VMDK size was 60 GB. Give the users more space, and they will use it :D

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Re: [POLL] What is your average VM size?

Post by emachabert » Apr 07, 2014 10:15 pm 1 person likes this post

Yes I knew that website because HP often use it as an example (you can see they are first at storage and first at servers)

Anton, if i don't remove those huge VM, the average size goes up to 189GB. On 2347 VM, i had 58 VM over 1 TB ( 2,3%)
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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 07, 2014 10:30 pm

Thanks a bunch Eric, this is incredibly useful.

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Re: [POLL] What is your average VM size?

Post by lp@albersdruck.de » Apr 09, 2014 5:13 am

Very small environment here, average VM size is a bit under 50 GB for 18 VMs.
There are two very large VMs though, a file server and our main application's one which both are over 3TB in size each.

I selected 50 GB average.

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Re: [POLL] What is your average VM size?

Post by Gostev » Apr 14, 2014 2:10 pm

Results are almost not changing as more people vote, still 90% of VMs appear to be 200GB and less in size. I guess this is the number I was looking for...

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Re: [POLL] What is your average VM size?

Post by bd134492 » Apr 14, 2014 2:48 pm 1 person likes this post

From vCenter operations maanger
For 3,394 VM
VM Configured Disk Size 73 GB
VM Disk Space Usage 38 GB
VM Disk Space Provisioned 88 GB

Barry

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Re: [POLL] What is your average VM size?

Post by Tobias_Elfstrom » Apr 14, 2014 3:11 pm 1 person likes this post

For around 800 VM Avg. VM Disk Space Allocation is just shy of 250 GB

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Re: [POLL] What is your average VM size?

Post by Peejay62 » Apr 15, 2014 1:38 pm

appx. 1500VMs averaging 177GB.. There are some VMs crossing the 5 and even 10TB boundary though..

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Re: [POLL] What is your average VM size?

Post by feelgood » Apr 22, 2014 6:05 am 1 person likes this post

about 50 between 20 GB and 100 GB, about three around 300 GB, two above 1.5 TB.

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Re: [POLL] What is your average VM size?

Post by MaartenK » Apr 22, 2014 8:35 am 1 person likes this post

Arround 350VMs with an avg. of 100GB. Thanks to Windows 2012 (R2). Windows eats diskspace like cookiemonster :shock:

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Re: [POLL] What is your average VM size?

Post by poulpreben » May 08, 2014 7:15 am 1 person likes this post

Customer feedback: Around 500 VMs, Approx. 100 GB average size.

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