Using Symbolic Links
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You can move tables and databases from the database directory to other
locations and replace them with symbolic links to the new locations.
You might want to do this, for example, to move a database to a file
system with more free space or increase the speed of your system by
spreading your tables to different disk.
The recommended may to do this, is to just symlink databases to
different disk and only symlink tables as a last resort.