How to Use the calculator:
Input Fields :
Total Number of VMs : Enter total number of VMs in the Infrastructure
Number of VMs in Single VMFS Datastore : Min Value : 1 : Max Value : Follow the best practices usually 10-15 VMs
Total Disk Size for the VM (GB) : Enter combined disk size for all the disks the VM will have
Memory Assigned per VM (GB) : Enter the memory value , Max 1 TB
Total IOPS per VM : Enter your IOPS value for a given VM , for server virtualizations it’s usually 30-40 IOPS per VM
Read Ratio % :Enter your expected read ratio ,combined value with write should not be more than 100
Write Ratio % :Enter your expected write ratio,combined value with read should not be more than 100
RAID Level : Enter your appropriate RAID level , this will be used for calculating Write Penalty
Disk RPM : Enter the RPM value of the Disk
Output Value :
Total Size of a Single VMFS Datastore(GB) : Tells you the size of a Single VMFS volume , calculation takes into account snapshot and free space recommendations
Total No. VMFS datastores : Tells you how Many datastores you need with above mentioned capacity
Spindles Required for a Single Lun : Tells you how many disk spindles you require for a given Lun, value doesn’t take into account decimal calculations
Spindles Required for all the Luns : Tells you total spindles which is required in your environment for all the Luns
Cool Calculater, thank you
Glad that it is helpful !!
Hi Samir,
here Auguste from Cameroun
This blog is very helpfull for me .
I am just starting with VMware Technologie which i find very interesting. Currently I own the 3 new VCAs. I am also preparing for the VCP5 exam .
Want to know if I can ask some questions here in your blog
Thanks
Hi Auguste,
Feel free to post your questions , I will be more than happy to help.
Thanks,
Samir
Can you tell me formula to calculate output manually ?
I encourage you to use the one on this site as I will be updating this with any latest things i find.
thanks
Hi Samir,
Great tool. I plan to use it for my work. Is there an Excel of the same, which is shareable ?
The idea is to put this as a tab in Excel while I build my overall costing for a given customer proposal.
Thanks
Jaikant
jaikants@gmail.com
It’s based on an excel calculation, however I am not sure how this is going to help you in a costing proposal. That should be part of the overall storage sizing and not just VMFS.
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