On Fri, Nov 20, 2009 at 1:50 PM, Chris Mason <chris.ma...@oracle.com> wrote: > COW semantics require touching btree nodes all the way up to the root of > the btree, but this is different from the directory. Directories are > stored in the btree, but you won't have to touch more than 8 or so btree > levels regardless of how deep your directory tree is. > > -chris
Thanks for straightening me out on that point. Still, 8 might be a lot. Regardless of the decoupling of btrees and directories, am I right in thinking that mounted subvolumes instead of directories would (1) reduce contention (2) reduce the number of levels touched since number of levels is a function of the number of fs entities in the volume, therefore (3) defining a file system entity that transparently becomes a mounted subvolume (by transparently I mean without an additional mount command) and (4) crafting a utility to streamline creation-and-implied-mounting of the entity type from #3 would make sense? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
