Userspace RAM access

Hi - I’m looking for a way to address files in RAM only in order to minimize eMMC writes; there will be a lot of manipulation of contents that I’d like to keep away from nonvolatile storage, and then would like to save in full block writes if possible.

Sorry to noob this, but is there a way to ensure RAM access via /dev/xxx?

There should already be a tmpfs filesystem mounted over RAM at /tmp, using the command 'df -h' will show you all your current mounts and sizes.

Thanks, Jack. Where is this documented so that I don’t have to bother the board next time?

Standard Linux knowledge really. With things like this, you've got to remember the board just runs Linux, so any Linux knowledge base will give you tips on where to look and find these things out.