Just a idea: I don't know if btrfs works like that or not but idea would be that b-tree filesystem should be able to "loose" or "discard" branches be removing a node. Cut a tree node and branches will fall off - and get overwrited as empty space sometime in future (just like during data deletion). If subvolume is filesystem in filesystem (don't know to what extend this is true in btrfs) then sub-filesystem could be re-formated but severing it links to its branches. Reason for this if of course fast and not io costly deletion of large number of files. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
