Re: Selective Compression/Encryption

Christoph Hellwig
2008-12-10T17:55:38Z

On Wed, Dec 10, 2008 at 08:44:47AM -0500, Chris Mason wrote:
> I had planned to make the bits inheritable from the directory inode
> flags. There are two different discussions around xattrs for this. One
> is using xattrs to store the flag, which I'd would rather avoid because
> it is checked in some performance critical places.
>
> The second is using xattr programs to set the flag, which I don't really
> have an opinion on. The idea of having the flags backed up by backup
> programs or rsync is really nice, but do any of the backup programs
> actually copy out all the xattrs?

xfsdump does :) But I think especially the compressed bit is much
better off in the bit for the set/get flags ioctls used by chattr /
lsattr. These are implemented by all Linux filesystems, and even have
a compressed bit allocated already. (and xfsdump of course backs them
up, too ;-)) *run*