I'm trying to create an osm tileserver and am at the point where i've created the database to hold the output of osm2pgsql. But I can find neither the database (map_data) nor, of course, its tables. I need to softlink (ln -s) the tables to at least one other spindle, which has nearly a full TB of space open. I look in pgsql/data/base and see a lot of subtrees with numeric names. Presumably one of them is my map_data, but I can't find a name:number mapping table.
I'm used to MariaDB/MySQL, which seems much more straightforward to me.