Another BIG SURPRISE from VMware just few days before VMworld SF, The official VMware SAN Sizing tool, I am empathizing on official because this one is released by VMware. I have seen some other tools and excel sheets used for sizing but we should not use them anymore!
The tool is HTML5 based (yeah no flash!) and it will give you all the requirements needed to build up your VSAN environments in 2 steps UI wizard.
Step 1 will ask you for inputs about your VMs, Number, Size of VMDK, No. of VMDKs, No. of Snapshots taken from each VM,No of FTTs and No of Disk stripes per object.
Step 2 will ask you for inputs about your hosts, size of HDD, Extra usable HDD capacity (for future growth), magnetic disks per Disk groups, Disk groups per host, system memory (memory per host), number of cores per host and Maximum VMs/Core
I made a configuration with the below specs and the requirements generated instantaneously once I added all the inputs in the 2 steps wizard.
Quoting from the help guide in tool URL:
The purpose of this tool is to help determine the hardware specifications for hosts in a Virtual SAN cluster required to run a set of virtual machines defined by a set of input characteristics. These important assumptions should be understood before using this tool:
- All hosts in the cluster are assumed to have an identical hardware profile, i.e. numbers of hard drives and flash devices, amount of physical RAM, and number of CPU cores
- All virtual machines are assumed to be identical in storage characteristics, i.e. number of VMDKs, size of VMDKs (assumed identical for all disks), number of snapshots, and virtual memory size
- All virtual machines are assumed to have the same Virtual SAN policy, i.e. number of failures to tolerate and number of disk stripes per object
The tool is designed so that you can easily vary inputs to see the impact on the sizing output, thus allowing you to iterate manually for more sophisticated analyses