Usability

Downloading

Edonkey2000 is a unique peer-to-peer sharer in its transfer system. Files are hash identified and transferred in "chunks". This means the donkey can identify identical files even if they have been renamed, increasing the potential of downloading the entire file. Because of the hash identification files can be uploaded before they have completed downloading - the "chunks" that have been received are immediately shared. Files propagate quickly over the donkey network, and the automatic resume feature has high success even after a reboot. One thing to remember though - check there is room on your incoming folder drive for the entire file - you can only change it by completing or cancelling all your downloads, and you don't want to miss the last few chunks of your file. Although this ingenious file sharing system means the donkey is reliable for getting entire files the downloads are very slow - you have to have a lot of patience.

Direct Connect is a slow downloader as well. Users with a lot of files to share can get access to servers restricted to broadband users, which speeds transfers up a little, but one again you don't wouldn't want to be on a hurry. Direct Connect users a direct file transfer system and also has an auto-resume feature which completes file downloading from any user with the file. Direct Connect doesn't uniquely identify files and will not recognise variations in file names like Edonkey2000. On-the-ball users can rename their file and continue downloading from a new source if they identify it by the file size with a name variation.

KaZaA downloads files from various sources at the same time, to speed up the transfer rate. The software downloads a file from several sources and the pieces are reassembled into a single file on the receiver's drive. Like Direct Connect and the donkey, KaZaA has a reliable resume feature if a transfer is interrupted, however like Direct Connect resumes will only recognise sources with identical file names. Users report KaZaA is one of the speedier peer-to-peer sharers, but once again, patience is in order, and broadband users will get the most from this program.

Searching

All three programs have search features. Edonkey2000 has quick searches, and also offers an availability search, although the value of this is questionable. Direct Connect users can search particular hubs for material and although some users report it is time consuming going from hub to hub, the program does have an option to search the entire network. Direct Connect's sloppy interface has made this feature hard to find for some users. KaZaA has various search options and users report it is quick and reliable. Download times are shown with search results. KaZaA will also allow you to search for files not only by name, but by any keyword found in the stored description of the file. When files are imported to KaZaA a variety of meta data is automatically extracted, allowing information describing the content of the file to be stored. This information can be searched when looking for particularly files (eg you know the movie a song is from, but not the song title). This feature gives KaZaA the most powerful search system of the three.

Interface

KaZaa has an interface similar to Microsoft Outlook, so many new users will be immediately familiar with the layout and find using it a breeze. It's easy to navigate. Donkey users seem less than impressed with the presentation of the file sharer, however the many other benefits this program has to offer makes it worth persevering with the interface and learning your way around. Similarly Direct Connect's sloppy, hard-to-use windows/explorer based interface leaves much room for improvement over the next few releases. For users looking for something easy to navigate, KaZaA will win hands down.

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