WordPress MU

If a plugin is not explicitly stated for WPMU, how do I know which folders to put for that plugin?

this has been covered hundreds of times:

all plugins you put into mu-plugins, are executed automatically all the time.

all plugins in the plugins folder have to be activated as a normal wp plugin does.

not all plugins work inside mu-plugins folder, usually plugins that are inside a sub folder don't.

for any more info, search in these forums.

How about - If a plugin is not explicitly stated for WPMU, put it in the regular plugins folder.

For plugins that we put in mu-plugins, when we want to remove them, do we need to inactivate it?

If I am not wrong, we just need to delete the files from the mu-plugins.

I ask this because I was thinking what happens if the plugin inside the mu-plugin altered the database and how are we doing to delete unwanted tables when we remove the plugin?

Or, plugins that go into mu-plugin do not alter the database at all?

Here's my understanding...

You don't deactivate plugins in the /mu-plugins/ folder (just as you don't activate them). Simply remove them from the server.

Whether a plugin alters the database depends on the plugin itself. Its placement in the /plugins/ or the /mu-plugins/ folder makes no difference with this regard.

If new tables have been created in the database by a plugin and you want to get rid of them, you would need to drop them after you removed the plugin files from the server (via your server interface, not WPMU).