On Wed, Jan 08, 2025 at 04:13:01PM +0800, Ming Lei wrote: > It is backed by virtual memory, which can be big enough because of swap, and Good luck getting half way decent performance out of swapping for a 50TB data set. Or even a partially filled one which really is the use case here so it might only be a TB or so. > it is also easy to extend to file backed support since zloop doesn't store > zone meta data, which is similar to ram backed zoned actually. No, zloop does store write point in the file sizse of each zone. That's sorta the whole point becauce it enables things like mount and even power fail testing. All of this is mentioned explicitly in the commit logs, documentation and code comments, so claiming something else here feels a bit uninformed.