Another thing Tagsistant does by default is using SQLite. If you feel comfortable with SQLite or just don't know what does it mean, feel free to skip the rest of this section. If instead you would prefer to use MySQL, change the command line as follows:
$ tagsistant --db=mysql:host:database:user:password ~/myfiles
Of course you must provide the database and the user inside MySQL before mounting Tagsistant.
You can omit the tokens after mysql, accepting default values, but if you specify a token you must specify the tokens on its left too. So, if you just write --db=mysql, you are using default values of localhost, tagsistant, tagsistant and tagsistant for the other tokens.
This schema gives you the flexibility to maintain just one standard tagsistant user inside MySQL with password tagsistant, but allowed to access many tagsistant databases. To connect to DB photos or music, you'll just change the db name like in: --db=mysql:localhost:photos or --db=mysql:localhost:music.