If I want to use a cache drive to transfer files I under stand this flow. Files hit cache drive first. Mover at some point later moves these files to HDD. All future access to those "moved" files will come from the HDD. Pretty much just speed up the initial data transfer.

 

I have a second scenario that I dont know if it is possible. I want a frequently accessed file in cache. If the file is no longer accessed for some period of time it gets evicted to HDD. If another access to that same file happens I want it to move to cache again and new accesses to that file to happen from cache. -> Is this possible? I.e. use the cache drive like an actual cache?

I have mover tuning installed but haven't been able to figure out how to make my second scenario happen.

Edited November 11, 20232 yr by xokia

7 hours ago, xokia said:

I have a second scenario that I dont know if it is possible. I want a frequently accessed file in cache. If the file is no longer accessed for some period of time it gets evicted to HDD. If another access to that same file happens I want it to move to cache again and new accesses to that file to happen from cache. -> Is this possible? I.e. use the cache drive like an actual cache?

This is not a supported scenario unfortunately.

 

I think the closest you will get is if you are using a ZFS pool and the ZFS arc is being used to cache recently accessed files.   However the ZFS support is new and still evolving with Unraid so no idea if there are 'gotchas' that I am not aware of.