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I have a large number of MP3s (> 10000) organized in a directory structure like
/Music/Artistname/Albumname/Trackname.mp3
Many of them are missing the correct ID3 tags for artist and album.
Does anybody know from own experience a tool that can do this automatically? A Windows solution would be preferred but I'd be ready to set up a Linux VM for this if some nifty shell script exists.

Do you want to set them automatically according to the folder names? Or would you be fine with tagging according to fingerprints? For the latter, we have plenty of questions here already, suggesting MusicBrainz Picard (cba to find the duplicates now).
– slhck – 2012-02-15T11:29:39.717check out musicbrainz picard it's really popular and I think it can do what you want
– Raystafarian – 2012-02-15T11:30:27.423@slhck, Raystafarian thanks, but they've been ripped CD-wise and I have often removed those songs I didn't like, so I guess album fingerprinting won't work. A solution that automatically sets them according to the directory structure is probably the only way to go. – Pekka – 2012-02-15T11:31:48.643
If you use picard, you'd want to group the tracks in the same album together. In this case, and with the number of files and the organisation of the files, using the path seems to be a faster option, IMO. – Journeyman Geek – 2012-02-15T11:38:01.550
Related: http://superuser.com/questions/5065/windows-what-software-do-you-recommend-for-editing-mp3-id3-tags http://superuser.com/questions/95425/auto-tagging-mp3s
– Der Hochstapler – 2012-02-15T12:37:48.697