Features
Like other Japanese sharing software, Perfect Dark has its own proprietary P2P network called "unity".
One of the biggest characteristics of Perfect Dark is its powerful search capability. By using distributed hash tables, search performance is greatly improved compared to Winny or Share, making it unnecessary to rely on the construction of node clusters. This frees users from inputting or switching cluster keywords and also enables users to search for files of different genres at the same time. This is in contrast to Winny and Share, where cluster keywords, such as "DVDISO" or "アニメ"/"anime" are used to specify what types of files the user is searching for. These keywords segregate the network and introduce delays when the user changes to them.
The concept of "tree search" brings about strong search ability. In addition, the flexible use of AND, OR and NOT Boolean operators helps filtering out undesirable results.
Perfect Dark requires more bandwidth and hard disk space than Winny or Share, forcing a fairer load on all users. If a user does not have Perfect Dark configured with the proper settings or if the user is unable to support the settings, download rates will be restricted and priority will be given to other users. This is intended to increase the retention rate of the Perfect Dark network.
The author implements an architecture called dkt+dht+du in the design of the network. There are other features besides file sharing such as a simple bulletin board.
Read more about this topic: Perfect Dark (P2P)
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