I was designing a customer vSAN deployment and I came across the guidelines and formula for calculating the required ESXi Coredump partition size: https://kb.vmware.com/s/article/2147881
Right away, I started working the formula for my customers deployment, when it occurred to me; this is WAY more complicated than it needs to be!
VMware actually wants you to take a number (the size of SSD in GB), divide by 100, multiply by 0.181 and then multiply by 0.25. Ridiculous!
- Why not just multiply by 0.0045, it is exactly the same thing!
Here is my, simplified way of calculating the coredump partition required for ESXi when using vSAN 6.5+:
|Multiplier||Worked example: 1 Disk Group, 1TB DRAM, 600GB SSD|
|For every 100GB SSD||0.00045||.27|
|For each disk group||0.33||0.33|
|For each TB DRAM||2.56||2.56|
Here is VMware’s much more complicated way of calculating the required coredump partition for vSAN: