I’ve been struggling to find a way good way to estimate the daily change rate for a VM so I can use this info to better estimate the journal size. I’ve read through all the Zerto guides on the topic and they all reference using the daily change rate % in their formula but don’t give any recommendations on how to go about finding this value. The only metrics close to this would be average disk writes for the VM but this doesn’t give me a total value of all the bits written over a period of time.
The only way I can see how to most accurately estimate journal size is to setup the VM in Zerto with a smaller recovery period like 4 hours, and extrapolate that out to a larger recovery time. This involves setting up the VM in Zerto however and I wanted to try and get an estimate without setting up the VM.
How is everyone else estimating journal size?