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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&ndash;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&ndash;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&ndash;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&ndash;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]]

Latest revision as of 23:59, 31 December 2014

Recently there is a media meeting about the air jordan Team 10 / 16 Low (White / Silver / Grey) which are held in New you are able to. In fact, Chicago Blackhawks presented the media get together. Although this meeting was held in last year, it is still equipped with a great influence on people. It is that this pair of Nike Nike air jordans Team 10 / 16 Low Footwear is merely established simple jordans shoes. I believe it is do not drop in Shoes room.

Over the years, Got a few parents, that have made my job an uphill struggle. When their child gets the basketball, parents will yell (take all this the way, or shoot the ball). Now your youngster has a dilemma. Must i listen for the air jordan shoes coach, or do I listen to my father? This is a magnificent conflict to them, which enables them to lead to indecision.

Music and famous rapper Kanye West has also been on the celebrities' lists of those seen wearing Air Jordan shoes. Kanye west has been seen wearing the Air jordan boots component most Music Videos. His favorite Nike air jordans Shoes include the Air Jordan 8 Aqua. Kanye has been frequently spotted rocking with this pair of Air Jordan brand whether when performing, playing or watching his favorite sport, the NBA basketball league or getting. Carmelo Anthony a well known star player of the Denver Nuggets Has also endorsed the Nike/Jordan associated with boots.

There an additional kind of shoes that are very hot inside the sports pumps. It is Nike Air force ones, also named Air force Ones. It is famous for leather cross trainers available as both high tops and low covers. Such a hybrid shoes is considered by Nike Air force ones simply because "best of both worlds" by combining them into one. Are usually several two regarding opinions, some have loved the air jordan Fusion concept from Jordan Brand, others have hated such a design. No matter what opinion you hold, the combination is still to be considered as the "best of both worlds" in the sports period.

So these are the Jordan 2010s, and with the new shoe comes a new endorser, Dwyane Wade(notes). Wade is latest member of Jordan Brand, and owner of probably one of the most Jordan-styled game in the NBA. As both Carmelo Anthony(notes) and Chris Paul(notes) already have signature shoes, this is often a natural install. As you can imagine, there's been a huge promotional push about that very very simple. All of this makes sense: Chicago kid who plays like Jordan wearing the new Jordans. Optimal. Except the shoes.

It is factual Miller was not peak contestant like Michael jordan but he was a tremendous contestant who kept worrying you typically the recreation. It is primarily the induce plenty of followers of MJ does not like him and Miller was extended regarded as the implacable foe for his counterpoint defending versus and soiled converse and curt probability.

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