On 05/06/2011 08:47 AM, Hans K. Rosbach wrote: > Hi, I am receiving mixed signals on whether GlusterFS actually > support xattrs on the client side. I am told that it does support > xattrs but my tests seems to indicate that it does not. I also > seem to recollect reading a post to this list saying that it does > not support xattrs, but I am not able to find it now. > > Also a google search pretty much only tells me what I already > know; that GlusterFS uses xattrs extensively on the server side. > > Here is a test on the clients root filesystem (ext4): > [root /]# touch testfile > [root /]# attr -s testattr -V 2 testfile When I attempt this same operation on an ext4 filesystem, I get EOPNOTSUPP. When I do "man attr" it tells me why: attr - extended attributes on XFS filesystem objects The filesystem-independent programs for manipulating xattrs are getfattr and setxattr. When I do this it works fine: setfattr -n user.testattr -v "foo" testfile Note that, in addition to using setfattr instead of attr, the above conforms to the namespace requirements of generic xattrs by using the "user" namespace - which depends on the filesystem being mounted with the "user_xattr" flag. Use "man 5 attr" for more information about how to use non-XFS xattrs.
