[Dovecot] Recommendation for OCFS2 filesystem type

Hello

When creating an OCFS2 filesystem, one can specify a "filesystem type" option:

-T filesystem-type Specify how the filesystem is going to be used, so that mkfs.ocfs2 can chose optimal filesystem parameters for that use. The supported filesystem types are: mail Appropriate for file systems which will have many meta data updates. Creates a larger journal.

         datafiles
                Appropriate for file systems which will host a rela‐
                tively small number of very  large  files.  A  small
                journal  is  selected. Cluster size will be at least
                128K.

Considering I'm using a separate partition for the dovecot indices, and that I'm using mdbox, would it be more appropriate to use 'datafiles' for the mail location partition and 'mail' just for the indices? Or would 'mail' be appropriate for both even with the larger files created by mdbox?

Thanks, Andre