Selective downloading
From VuzeWiki
To download only specific files inside a torrent you have two options:
[edit] Deselecting files when loading the torrent
- Open the torrent through the Open Torrent Dialog
- If you've set Vuze to open torrents silently with the default download directory go to Files -> Open -> Open Torrent or use Ctrl+O
- Simply unselect the files you don't want to download in the lower table
[edit] Deselecting files after the torrent has been loaded
- Rightclick on the torrent -> Show details or doubleclick on the torrent in order to open the torrent details screens.
- Go to the Files Tab, which shows the details for the files in the torrent.
- Select all files you don't want to download
- Select Rightclick -> Priority -> Delete (or Do Not Download)
- Note: If you select Delete all partial data downloaded of the selected files will be deleted. If you select Do not download, the partially loaded data files are left on the disk.
[edit] Note: about file creation with Delete and DND
The files marked with Delete will not be allocated to your hard disk, while those with DND will be allocated and created. (This may confuse you, as the file directory in Explorer/Finder will show you the full size of the DND file.) And even the "Delete" files will be allocated to the extent that their content is part of a piece, which will be downloaded due to other files.
The whole bittorrent logic is based on dividing the data files to even-sized pieces, typically 256 kB, 512kB, 1MB or 2 MB. And then the pieces are further divided into 16 kB blocks. Clients request/send the blocks, but maintain download correctness assessment (checksums) based on full pieces. If you look Files details tab of torrent's details, you will notice that for each file there is listed the number of first piece and the number of pieces.
As file lengths do not match piece boundaries, it is very typical that a piece will contain parts of several files (at least 2 files, but e.g. a 2 MB piece might easily contain 5-10 JPG images). Even if you mark some of those files DND or delete, but the piece contains contents of files you want, then the whole piece will be downloaded and written to disk. Thus you may end up with at least parts of files you did not want.
Read the Azureus FAQ
