I found below document which explains a little about performance impact when vSAN encryption is enabled.
The Code Keepers: vSAN Native Encryption - Part 1 - Virtual Blocks
-> There is minimal impact to CPU cycles while we encrypt data. This is fundamental to how encryption has been designed for vSAN. For most workloads (with AES-NI enabled) we expect somewhere between 5-15% CPU penalty and no performance overhead. This overhead is representative of running vSAN with dedupe and compression turned on.
However, I am a little confused that what does 5-15% CPU penalty mean? Means CPU speed will become slower at 5-15%?
And what does "This overhead is representative of running vSAN with dedupe and compression turned on" mean? When the dedupe and compression is enabled, there is no performance overhead ?
It will be appreciated if anyone could explain more detail.
it means that your CPU utilization may go up with 5-15%, depending on the IO of course. Which is similar to the increase you would see when you enable Deduplication and Compression.
it means that your CPU utilization may go up with 5-15%, depending on the IO of course. Which is similar to the increase you would see when you enable Deduplication and Compression.
Thank you so much. I see. Penalty is about utilization not speed.
And about the second question(performance overhead), could you explain a little more ?