abstract overlay network, application layer
anonymous: extra routing layer
structured: organized users and resources
	distributed hash table (dht)
		distributed key,value lookup
unstructured:
	pure: only equipotent
	hybrid: supernodes
	centralized: central server
	flooding

application:
	content/file sharing
	networking
		dns, cloud computing
	science
	search: yacy
	communication: skype, voip
	chord project, past storage utility, p-grid, copnet, jxta
	bitcoin

juxtapose (jxta)
	language and platform independent protocol for p2p networking
	protocols:
		peer resolver protocol
		peer information protocol
		rendezvous protocol
		peer membership protocol
		pipe binding protocol
		endpoint routing protocol
	peer: have ids
	peer categories:
		edge peer: low bandwidth
		rendezvous peer: coordinates peers, message propagation
		relay peer: for peers behind firewalls through other protocols
	applications:
		boxcloud: disappeared
		onedrup: nothing
		b2een: b2b, no info about p2p
		collanos: inactive
		sixearch: p2p search engine: last post 2010
	services:
		peer services: provided by a single peer
		group services: provided by the whole group in a federated, redundant or cooperative way
	peer groups: peers that have a common set of services and a common purpose
	communication: through messages/advertisements:
		xml that describes a resource
		sockets
		pipes: communication channels
			asynchronous, unreliable, unidirectional
			unicast, unicast secure, propagate
			bound to an endpoint or pipe to peer
	search: decentralized through distributed hash table (dht)
	security requirementd:
		confidentiality, authentication, authorization, data integrity, refutability

jxse:
	implementation of jxta

opentracker:
	uses libowfat
	main -> server_mainloop
		on input:
			tcp -> handle_accept
			udp -> handle_udp6
			selfpipe -> io_tryread
			else handle_read
		while mutex_workqueue_popresult -> http_sendiovecdata
		while io_canwrite -> handle_write
		handle timeout
		livesync_ticker

geordi: c++ evalbot

p2p cloud storage:
	wuala p2p cloud storage

simple cloud computing:
	platform as a service
		amazon aws: elastic compute (e2)
			amazon machine images (amis)
			amazon linux ami
			aws sdk for java
		softlayer
			dedicated servers
			cloud layer: build your own cloud
	software as a service
		mogulus -> livestream
	managed, scalable hosting
		upload applicative code
		google appengine
	research report cloud in 2011 and beyond:
		delivery models:
			software as a service: vendor controls entire stack
			platform as a service: converging
			infrastructure as a service: raw computation power, metered billing
		deployment modes:
			public/real
			private
			community
			hybrid

p2p cloud computing:
	krishnan subramanian, www.krishworld.com
	scribd.com/krishnan
	rethinking cloud computing - from client/server to p2p
	content delivery networks (cdn)	
	has to be hybrid with servers for management, messaging, monigoring, ...
	researchers of uni of western ontario
	advantages
		reliability
		cost effective
		no monopoly
		http://silvertonconsulting.com/blog/2010/01/28/free-p2p-cloud-storage-and-computing-services/
		napster&gnutella and/or boinc&condor
		p2p cloud storage would be easiest
	http://www.quora.com/Is-the-market-ready-yet-for-P2P-cloud-computing

hadoop
	nutch: search engine
	distributed computing
	subprojects:
		avro: data serialization
		chukwa: dada collection systems for management of distributed systems

tahoe-lafs:
	free open source cloud storage system