Lucas César's questions

I'm working on a system where I have a program that outputs high quality videos for a tv connected to an HDMI (raw 1080p data for instance) and I'm having an issue that when I copy some files to my hard drive it reflects on the FPS being displayed in the output. Since it only occurs when I'm copying files to the same disk (I'm using ssd, btw), the write operation is interfiering in the read operation. So is there any way that I can tune my hard drive to give priority for reading?

Or do I have to go in some other direction?

So here's is the scenario, I have a shell script that based on a network command it execute an action, it may be a service restart or stop. That part is working fine, but I'm stucked at a part that I need to guarantee that it can be more flexible, i.e, that I can add some services later without touching the main script. So what I have in mind is to separate the script into multiple scripts, like interfaces.d/ does, but instead of a config file I want to store some code inside of it and load it when the script is called. Problem is, for each "process" I want to create a separate file with an if within it. Is that even possible?

Thnaks.

I'm facing an issue where I have some cached contents in a disk and I want to protect it with a token url.

I can protect my files via htaccess, once they are not cached (direct access), but now I need to protected files that are in cache.

Anyone can light my way on this? Thanks.