root/galaxy-central/lib/galaxy/webapps/community/model/migrate/migrate.cfg

[db_settings]
# Used to identify which repository this database is versioned under.
# You can use the name of your project.
repository_id=Galaxy

# The name of the database table used to track the schema version.
# This name shouldn't already be used by your project.
# If this is changed once a database is under version control, you'll need to 
# change the table name in each database too. 
version_table=migrate_version

# When committing a change script, Migrate will attempt to generate the 
# sql for all supported databases; normally, if one of them fails - probably
# because you don't have that database installed - it is ignored and the 
# commit continues, perhaps ending successfully. 
# Databases in this list MUST compile successfully during a commit, or the 
# entire commit will fail. List the databases your application will actually 
# be using to ensure your updates to that database work properly.
# This must be a list; example: ['postgres','sqlite']
required_dbs=[]