filesystems replicated between localhost and mentha, and look for files created elsewhere on dahlia and salvia. Assuming the four nodes are similar, you might want to consider using nufa with local-volume-name set to one of the two replicated subvolumes, and let mentha use the other replicated subvolume for the other direction. Also, you should be able to use the localhost filesystems with just storage/posix instead of protocol/client (I assume you must have a separate glusterfsd running for this setup to work) which would eliminate some context switches and another layer of translator hierarchy. See http://www.gluster.com/community/documentation/index.php/NUFA_with_single_process for further examples and explanation, and good luck.
