is a daemon acting as a write serialiser to the internal gvfs metadata storage. It is autostarted by GIO clients when they make metadata changes. Read operations are done by client-side GIO code directly, and don't require the daemon to be running.
The gvfs metadata capabilities are used by the nautilus file manager, for example.
Prints a short help text and exits.
Shows the version number and exits.
Replace the currently running instance.
On success 0 is returned, a non-zero failure code otherwise.
The directory where the gvfs metadata database files are stored