The "music directory" is where you store your music files.
MPD stores all relevant meta
information about all songs in its "database". Whenever you
add, modify or remove songs in the music directory, you have
to update the database, for example with
Depending on the size of your music collection and the speed of the storage, this can take a while.
To exclude a file from the update, create a file called
.mpdignore in its parent directory. Each
line of that file may contain a list of shell wildcards.