P2PIR is one of the an application of peer to peer network. P2PIR combines key elements of File Sharing and Federal Information Retrieval. No single technique is used for all P2PIR problem. Recall and Precision are used for Evaluation of P2PIR.
A field dealing with the structure, analysis, organization, storage, searching and retrieval of information is called information retrieval. And Searching in peer-to-peer networks
is called Peer to Peer Information Retrieval.