Yup, but you can copy that file (+ the .meta file) to disk, reboot, copy back, etc. It'll take a long time for a large cache unless your disk is fast. If you h

Yup, but you can copy that file (+ the .meta file) to disk, reboot, copy back, etc. It'll take a long time for a large cache unless your disk is fast. If you have some kind of pmem device and a dax mount, those can survive reboots on their own.