Editing Peer-to-peer (section)

====Hybrid models====
Hybrid models are a combination of peer-to-peer and [[Client–server model|client–server]] models.<ref>{{cite book |last=Darlagiannis |first=Vasilios |chapter=Hybrid Peer-to-Peer Systems|editor-last1=Steinmetz |editor-first1=Ralf |editor-last2=Wehrle |editor-first2=Klaus |title=Peer-to-Peer Systems and Applications |publisher=Springer |year=2005 |isbn=9783540291923 |chapter-url=https://books.google.com/books?id=A8CLZ1FB4qoC&pg=PA353 }}</ref> A common hybrid model is to have a central server that helps peers find each other. [[Spotify]] was an example of a hybrid model [until 2014].<ref>{{Cite web |last=Pejchinovski |first=Gordan |title=Spotify – Combining Cache, Peer-To-Peer and Server-Client Architectures for Users’ Satisfaction |url=https://www.researchgate.net/publication/260281013_Spotify_-_Combining_Cache_Peer-To-Peer_and_Server-Client_Architectures_for_Users'_Satisfaction |website=Researchgate}}</ref> There are a variety of hybrid models, all of which make trade-offs between the centralized functionality provided by a structured server/client network and the node equality afforded by the pure peer-to-peer unstructured networks. Currently, hybrid models have better performance than either pure unstructured networks or pure structured networks because certain functions, such as searching, do require a centralized functionality but benefit from the decentralized aggregation of nodes provided by unstructured networks.<ref>{{cite journal |last1=Yang |first1=Beverly |last2=Garcia-Molina |first2=Hector |year=2001 |title=Comparing Hybrid Peer-to-Peer Systems |journal=Very Large Data Bases |url=http://infolab.stanford.edu/~byang/pubs/hybridp2p_long.pdf |access-date=8 October 2013}}</ref>