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en>Brews ohare: /* References */ See also section

2014-12-31T21:59:24Z

References: See also section

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	~~'''BATON''', BAlanced Tree Over-lay Network,~~ is a ~~distributed tree structure for [[peer-to-peer]] (P2P) systems. Different from other overlays that use a [[distributed hash table]] (DHT), such as in~~ the ~~[[Chord~~ (~~peer-to-peer~~)~~\|Chord]] system, BATON organizes peers~~ in ~~a distributed tree~~ to ~~support range search~~. In ~~addition~~, ~~BATON tries to keep~~ the ~~tree~~ in a ~~balanced manner as the [[AVL tree]]~~. ~~And hence, the search cost~~ is ~~bounded by <math>O(\log N)<~~/~~math>.~~

	~~==Architecture==~~
	~~<!-- Deleted image removed: [[Image:Baton.JPG\|right\|500px\|thumb\|BATON Overlay{{Pufc\|1=Baton.JPG\|date=21 September 2012}}]] -->~~

	~~BATON~~ is ~~a binary tree~~. ~~Each node in BATON keeps four kinds of links:~~
	~~# link to its parent node~~
	~~# links to its child nodes~~
	~~# links to its adjacent nodes in in-order~~
	~~# links to the routing nodes in the same level~~

	~~In each tree level, the node~~ is ~~named by its position~~ in ~~the tree~~. ~~For example, node ''h'' is named 3:0, node ''i'' is named 3:1 and node ''p'' is named 4:6. For a node at position~~ <~~math~~>p<~~/math~~>, it will fill its left routing table by nodes at position <math>p - 2^x</math> for any valid <math>x \geq 0</math> and fill its right routing table by nodes at position <math>p + 2^y</math> for any valid <math>y \geq 0</math>.

	~~==Node Joining and Leaving==~~
	~~The new node's joining request will always be forwarded to the leaf node. The leaf node will check to see whether it routing table is full. If~~ the ~~routing table is full~~, ~~this level is full of nodes and the leaf node can accept the new node as its child to create~~ a ~~new level node. Otherwise~~, ~~it must forward the new node to take over one of the empty positions~~.

	When ~~a node wants to leave~~ the ~~network~~, ~~it must update~~ the ~~routing tables of its parent node~~, ~~child nodes, adjacent nodes and routing nodes~~. ~~If this node is~~ a ~~leaf node, it can leave~~ the ~~network safely. Otherwise~~, ~~it must find~~ a ~~leaf node~~ to ~~replace its position.~~

	~~==Routing==~~
	~~In BATON~~, ~~each node maintains a continuous key space~~. ~~Once a new node joins as its child, it splits its space~~ and ~~assigns half of it to the child. In this partition way, if we travel~~ the ~~tree in in-order, we can search the whole space in ascendant order. That~~'~~s why BATON supports range queries.~~

	~~For a range query q, BATON first locats its left bound, q~~.~~low. And then~~ the ~~search process will travel the tree in in-order (by adjacent link), until reach the upper bound, q~~.~~up. For locating a single key, BATON performs~~ the ~~similar routing strategy as [[Chord (graph theory)\|Chord]]~~. ~~First~~, ~~the request is routed to the farthest routing nodes which does not over hit the key. If no such routing nodes exist~~, the ~~parent link, child link~~ or ~~adjacent link is used~~.

	~~==Restructure==~~
	~~When~~ a ~~node x accepts a joining node y as its child and detects that~~ the ~~tree balance is violated, it initiates~~ the ~~restructuring process~~. ~~Without loss~~ of ~~generality, suppose~~ that ~~this restructuring is towards~~ the ~~right~~. ~~Assume that y joins as x's left child. To rebalance the~~
	~~system~~, ~~x notifies y to replace its position, and notifies its right adjacent node z that x will replace z's position. z then checks its right adjacent node t to see if its left child is empty~~. ~~If it~~ is~~, and adding a child to t does not affect the tree balance, z takes the position of t's left child~~ as ~~its new position~~ and ~~the restructuring process stops~~. ~~If t's left child~~ is ~~full or t cannot accept x as its left child without violating the balance property, z occupies t's position while t needs to find a new position for itself~~ by ~~continuing to its right adjacent node~~.

	~~==Load Balancing==~~
	~~BATON adopts~~ two ~~kinds of load balancing strategy. Once a node n detects that it is over loaded~~,
	~~# If its left or right adjacent node is light loaded, the node will transfer~~ some ~~data to~~ the ~~adjacent node to lower its load~~
	~~# If its adjacent nodes are not capable to share the load~~, the ~~node will invoke a process~~ to ~~find a randomly light loaded node in the network. The light loaded node leaves its original position and joins~~ as the ~~child~~ of the ~~overloaded node to take over part of its data~~. ~~The restructure process may be invoked.~~

	~~==See also==~~
	* [[Content addressable network\|CAN]]
	* [[Pastry (DHT)\|Pastry]]

	~~==References==~~
	* {{cite conference\|title=BATON: a balanced tree structure for peer-to-peer networks\|booktitle=Proceedings of the ~~31st international conference on Very large data bases~~, ~~Trondheim~~, ~~Norway\|pages=661–672\|year=2005\|isbn=1-59593-154-6\|author=[[H~~. ~~V. Jagadish]], Beng Chin Ooi~~, and ~~Quang Hieu Vu\|format=PDF\|url=http://www.eecs.umich.edu./db/files/p661-jagadish.pdf}}~~
	~~{{reflist}}~~

	~~==Further reading==~~
	* {{cite conference\|title=VBI-Tree: A Peer-to-Peer Framework for Supporting Multi-Dimensional Indexing Schemes\|booktitle=Proceedings of the ~~22nd International Conference on Data Engineering\|pages=34\|year=2006\|isbn=0~~-~~7695-2570-9\|author=[[H~~. ~~V. Jagadish]]~~ and ~~Beng Chin Ooi and Quang Hieu Vu and Rong Zhang and Aoying Zhou\|format=PDF\|url=http://www~~.~~comp~~.~~nus~~.~~edu~~.~~sg/~ooibc/vbi~~.~~pdf}}~~
	* {{cite conference\|title=Speeding up search in peer-to-peer networks with a ~~multi-way tree structure\|booktitle=Proceedings~~ of ~~the 2006 ACM SIGMOD international conference on Management~~ of ~~data\|pages=1–12\|year=2006\|isbn=1-59593-434-0\|author=[[H. V. Jagadish]]~~ and ~~Beng Chin Ooi~~ and ~~Kian-Lee Tan~~ and ~~Quang Hieu Vu and Rong Zhang\|format=PDF\|url=~~http://~~portal~~.~~acm~~.~~org~~/~~citation.cfm?id=1142473.1142475#}}~~
	* {{cite conference\|title=Efficient Skyline Query Processing on Peer-to-~~Peer Networks\|booktitle=Proceedings of the 22nd International Conference on Data Engineering\|pages=1126–1135\|year=2007\|isbn=1~~-~~4244~~-~~0803-2\|author=Shiyuan Wang, Beng Chin Ooi, Tung, A.K.H. and Lizhen Xu\|format=PDF\|url=http:~~/~~/www~~.~~comp.nus.edu.sg/~ooibc/batonskyline.pdf}}~~
	* {{cite conference\|title=Range queries over skip tree graphs\|booktitle=Computer Communications\|pages=358–374\|year=2008\|issn=0140-3664\|author=A. Gonzalez-Beltran and P. Milligan and P. Sage\|format=PDF\|url=http://portal.acm.org/citation.cfm?id=1332437&dl=GUIDE&coll=GUIDE&CFID=14349651&CFTOKEN=59457572#}}

	~~==External links==~~
	* [http://www.comp.nus.edu.sg/~bestpeer/ Website of BestPeer Project]

	~~[[Category:Distributed data storage]]~~

en>DexDor: /* See also */ rm Terminology cat (this article is not about language) (see WP:Categories_for_discussion/Log/2013_January_25#Category:Electronics_terminology)

2013-02-10T12:40:38Z

See also: rm Terminology cat (this article is not about language) (see WP:Categories_for_discussion/Log/2013_January_25#Category:Electronics_terminology)

← Older revision		Revision as of 14:40, 10 February 2013
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	~~I like Seaglass collecting~~. ~~Sounds boring? Not at all~~!~~<br~~>~~I also try~~ to ~~learn Norwegian~~ in ~~my spare time~~.<br><br>~~my blog post~~ [http://www.~~kyuhim~~.org/~~index~~.~~php~~/~~index~~.~~php~~?~~mid~~=~~board_Lbcs91~~&~~category~~=0&~~page~~=1&~~document_srl~~=~~61241 wordpress backup~~]		{{Unreferenced\|date=January 2008}}

			'''BATON''', BAlanced Tree Over-lay Network, is a distributed tree structure for [[peer-to-peer]] (P2P) systems. Different from other overlays that use a [[distributed hash table]] (DHT), such as in the [[Chord (peer-to-peer)\|Chord]] system, BATON organizes peers in a distributed tree to support range search. In addition, BATON tries to keep the tree in a balanced manner as the [[AVL tree]]. And hence, the search cost is bounded by <math>O(\log N)</math>.

			==Architecture==
			<!-- Deleted image removed: [[Image:Baton.JPG\|right\|500px\|thumb\|BATON Overlay{{Pufc\|1=Baton.JPG\|date=21 September 2012}}]] -->

			BATON is a binary tree. Each node in BATON keeps four kinds of links:
			# link to its parent node
			# links to its child nodes
			# links to its adjacent nodes in in-order
			# links to the routing nodes in the same level

			In each tree level, the node is named by its position in the tree. For example, node ''h'' is named 3:0, node ''i'' is named 3:1 and node ''p'' is named 4:6. For a node at position <math>p</math>, it will fill its left routing table by nodes at position <math>p - 2^x</math> for any valid <math>x \geq 0</math> and fill its right routing table by nodes at position <math>p + 2^y</math> for any valid <math>y \geq 0</math>.

			==Node Joining and Leaving==
			The new node's joining request will always be forwarded to the leaf node. The leaf node will check to see whether it routing table is full. If the routing table is full, this level is full of nodes and the leaf node can accept the new node as its child to create a new level node. Otherwise, it must forward the new node to take over one of the empty positions.

			When a node wants to leave the network, it must update the routing tables of its parent node, child nodes, adjacent nodes and routing nodes. If this node is a leaf node, it can leave the network safely. Otherwise, it must find a leaf node to replace its position.

			==Routing==
			In BATON, each node maintains a continuous key space. Once a new node joins as its child, it splits its space and assigns half of it to the child. In this partition way, if we travel the tree in in-order, we can search the whole space in ascendant order. That's why BATON supports range queries.

			For a range query q, BATON first locats its left bound, q.low. And then the search process will travel the tree in in-order (by adjacent link), until reach the upper bound, q.up. For locating a single key, BATON performs the similar routing strategy as [[Chord (graph theory)\|Chord]]. First, the request is routed to the farthest routing nodes which does not over hit the key. If no such routing nodes exist, the parent link, child link or adjacent link is used.

			==Restructure==
			When a node x accepts a joining node y as its child and detects that the tree balance is violated, it initiates the restructuring process. Without loss of generality, suppose that this restructuring is towards the right. Assume that y joins as x's left child. To rebalance the
			system, x notifies y to replace its position, and notifies its right adjacent node z that x will replace z's position. z then checks its right adjacent node t to see if its left child is empty. If it is, and adding a child to t does not affect the tree balance, z takes the position of t's left child as its new position and the restructuring process stops. If t's left child is full or t cannot accept x as its left child without violating the balance property, z occupies t's position while t needs to find a new position for itself by continuing to its right adjacent node.

			==Load Balancing==
			BATON adopts two kinds of load balancing strategy. Once a node n detects that it is over loaded,
			# If its left or right adjacent node is light loaded, the node will transfer some data to the adjacent node to lower its load
			# If its adjacent nodes are not capable to share the load, the node will invoke a process to find a randomly light loaded node in the network. The light loaded node leaves its original position and joins as the child of the overloaded node to take over part of its data. The restructure process may be invoked.

			==See also==
			* [[Content addressable network\|CAN]]
			* [[Pastry (DHT)\|Pastry]]

			==References==
			* {{cite conference\|title=BATON: a balanced tree structure for peer-to-peer networks\|booktitle=Proceedings of the 31st international conference on Very large data bases, Trondheim, Norway\|pages=661–672\|year=2005\|isbn=1-59593-154-6\|author=[[H. V. Jagadish]], Beng Chin Ooi, and Quang Hieu Vu\|format=PDF\|url=http://www.eecs.umich.edu./db/files/p661-jagadish.pdf}}
			{{reflist}}

			==Further reading==
			* {{cite conference\|title=VBI-Tree: A Peer-to-Peer Framework for Supporting Multi-Dimensional Indexing Schemes\|booktitle=Proceedings of the 22nd International Conference on Data Engineering\|pages=34\|year=2006\|isbn=0-7695-2570-9\|author=[[H. V. Jagadish]] and Beng Chin Ooi and Quang Hieu Vu and Rong Zhang and Aoying Zhou\|format=PDF\|url=http://www.comp.nus.edu.sg/~ooibc/vbi.pdf}}
			* {{cite conference\|title=Speeding up search in peer-to-peer networks with a multi-way tree structure\|booktitle=Proceedings of the 2006 ACM SIGMOD international conference on Management of data\|pages=1–12\|year=2006\|isbn=1-59593-434-0\|author=[[H. V. Jagadish]] and Beng Chin Ooi and Kian-Lee Tan and Quang Hieu Vu and Rong Zhang\|format=PDF\|url=http://portal.acm.org/citation.cfm?id=1142473.1142475#}}
			* {{cite conference\|title=Efficient Skyline Query Processing on Peer-to-Peer Networks\|booktitle=Proceedings of the 22nd International Conference on Data Engineering\|pages=1126–1135\|year=2007\|isbn=1-4244-0803-2\|author=Shiyuan Wang, Beng Chin Ooi, Tung, A.K.H. and Lizhen Xu\|format=PDF\|url=http://www.comp.nus.edu.sg/~ooibc/batonskyline.pdf}}
			* {{cite conference\|title=Range queries over skip tree graphs\|booktitle=Computer Communications\|pages=358–374\|year=2008\|issn=0140-3664\|author=A. Gonzalez-Beltran and P. Milligan and P. Sage\|format=PDF\|url=http://portal.acm.org/citation.cfm?id=1332437&dl=GUIDE&coll=GUIDE&CFID=14349651&CFTOKEN=59457572#}}

			==External links==
			* [http://www.comp.nus.edu.sg/~bestpeer/ Website of BestPeer Project]

			[[Category:Distributed data storage]]

en>Helpful Pixie Bot: ISBNs (Build KG)

2012-05-11T11:03:44Z

ISBNs (Build KG)

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I like Seaglass collecting. Sounds boring? Not at all!<br>I also try to learn Norwegian in my spare time.<br><br>my blog post [http://www.kyuhim.org/index.php/index.php?mid=board_Lbcs91&category=0&page=1&document_srl=61241 wordpress backup]