> Actually, I think determining which files are needed and which are not > is not AuFS's job. There are several atime-based tools to determine > temporary files that are not used anymore and delete them or move them > away. I think exposing a mechanism for moving specified files to /hdd > will be sufficient. An external daemon will monitor the ramdisk and > request moving files that are not used to /hdd, thus making space for > writing new files. Moving files back up on reading is not needed > because the kernel caches frequently accessed files in RAM, and moving > files up on writing is already supported (isn't it?).
That is very similar what I am thinking. I have a plan to add a new feature called HSM (Hierarchical Storage Management) which will be implemented by - a simple separated/isolated aufs feature, move-down. - a user-space daemon which monitors the usage of branch fs, compares it with the speicified watermarks, creating a sorted file-list, and triggers the move-down operation. But I am not sure when such feature will be opened. J. R. Okajima ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1
