Disk usage discrepancy?

[Alexey]

I believe there is not. But you need to google how to do it in your case.
There are two known implementations:

• use ZFS (there are a lot of articles in the internet how to do so)
• use LVM: Metadata cache ext4 (RAM maxed) - #5 by Ambifacient (or again, use Google).
• It’s also possible with Windows using a tiered Storage Spaces: GitHub - freemansoft/win10-storage-spaces: Scripts for creating an destroying Fault Tolerant multi-tier storage spaces on Windows 10 or a Primocache.

@batelis

The problem should be that the test data already takes 100% of hdd capabilities, no?

perhaps. But the goal is to emulate the future load from the customers:

Updates on Test Data

I would say testing it in production is secondary. Our primary test is our simulator. But that is only one part of the equasion. We can optimize the code but we can’t make this work for the dumbest imaginable nodes. We will have to give all of you a chance to verify in advance if your nodes will be able to keep up with the load. So production it will be at some point. Just not now while we are still working on some code changes. My hope is that we can share the simulator at the end. It has h…

So, if we win, you likely would have the same usage in the future.