a query optimization approach that incorporates inter-node distances into the cost model. The query plan applied by this cost model would produce much better plans in terms of the overall network usage for data transmission. Our study also con-firmed a significant advantage of this cost model in the "peer-to-peer collaboration"Web
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practice, query latency might be very high, especially in large-size overlays where the tree happens to very deep. Load balance issue Second, relatively a small fraction of interior-nodes undertake all the burden of communication and processing loads, i.e. propagate queries, and aggregate answers. The processing load is related to the branchingWeb
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Query processing in peer to peer network project Description: Query processing in peer to peer network project is a cse project which is implemented in visual studio C#.Net platform. This project explains about finding our sum, average, minimum and maximum count and aggregate in query processing. Peer to peer database has …Web
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Abstract Peer-to-peer (P2P) has become a modern distributed computing architecture that supports massively large-scale data management and query processing. Complex query operatorWeb
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processing step. Then, super-peers aggregate theK-skyband sets from their peers, and maintain this aggregated data to answer any incoming top-k query. By exchanging skyline sets [9] (which are a subset of the K-skyband sets) at super-peer level, we are able to route queries to those super-peers that actually contribute to the top-k result. Thus ...Web
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Efficient Search in Peer to Peer Networks By: Beverly Yang Hector Garcia-Molina Presented By: ... The average over a set of representative queries of the aggregate processing power consumed at each node on behalf of the query Quality of Results Results from the perspective of user Number of results: the size of total result set …Web
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The ability to approximately answer aggregation queries accurately and efficiently is of great benefit for decision support and data mining tools. A P2P network …Web
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Abstract Join aggregate queries, where join operations are followed by aggregate operations, are very common in data processing. In some application scenarios where data are incomplete and ambiguou...Web
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Computing a high-quality random sample of the database efficiently in the P2P environment is complicated due to several factors: the data is distributed (usually in uneven quantities) across many ...Web
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Also, queries can be addressed only to relevant peers, minimizing network traffic and improving system scalability. In this work, we propose an approach for …Web
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aggregation of vast amounts of data covering thousands of peers. Sensor networks can directly benefit from aggregation of traffic analysis data by offering a more efficient …Web
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We introduce so-called Super-Peers which structure a P2P network. Using this Super-Peer based network we "unroll" queries. This allows us to execute even user-defined operators nearby the data ...Web
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A new robust and adaptive protocol for computing aggregate values over network components is presented and studied. It is suitable for large and dynamic systems, including peer-to-peer or grid computing systems. The core of the protocol is a decentralized proactive push-pull gossip-based communication scheme.Web
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Novel sampling-base d techniques for approximate answering of ad-hoc aggregation queries in large scale databases of peer-to-peer data bases are presented. Peer-to-peer (P2P) network is increasingly becoming popular because it offers oppor¬tunities for realtime communication, ad-hoc collaboration and information sharing in a large-scale distributed …Web
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The aggregate R-tree indexing the sub synopsis will be denoted as I as shown in the Figure 2. Fi gure 2: Partitionin the R-Tree. ... range queries in a peer-to-peer network is where data are ordered according to Hilbert curves, and then, distributed among the peers. The compression and indexing processes result in aWeb
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networks, there is no central server managing the network, neither is there a central router. Some examples of pure P2P Application Layer networks designed for peer-to-peer file sharing are gnutella (pre v0.4) and Freenet. b) Hybrid peer-to-peer systems which distribute their clients into two groups client nodes and overlay nodes.Web
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Keywords: Approximate query processing, aggregate query processing, computer networks, distributed database query processing, query cost estimation, ideal two phase algorithm. 1 Introduction 1.1 Peer-to-Peer Databases The P2P network model is becoming the preferred medium for file sharing and distributing data over the Internet.Web
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Approximation for Aggregate Queries. Efficient approximation of aggregate queries in unstructured P2P networks can be done by sampling. Starting at the peer …Web
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The main challenge in P2P approximate query processing is to select the optimal subset of peers to which the query is forwarded. However, the selection criteria for this subset are completely different for top-k and aggregate queries.While in top-k the goal is to identify the peers holding top objects, approximate aggregate querying algorithms need to find a …Web
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Abstract and Figures. As Peer-to-Peer (P2P) networks become popular, there is an emerging need to collect a variety of statistical sum- mary information about the participating nodes. The P2P ...Web
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Peer-to-Peer (P2P) search requires intelligent decisions for query routing: selecting the best peers to which a given query, initiated at some peer, should be forwarded for re- trieving additional ...Web
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Peer-to-peer databases are becoming prevalent on the Internet for distribution and sharing of documents, applications, and other digital media. The problem of answering large …Web
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After wireless sensor network is deployed, users often submit spatial window aggregation queries to obtain statistical information of the regions of interest, such as maximum temperature, average humidity etc. Existing spatial window aggregation query processing algorithms are based on the assumption that the communication links are …Web
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Figure 2: The "equipment" mapping problem - "Aggregate queries in peer-to-peer OLAP" Figure 2: The "equipment" mapping problem - "Aggregate queries in peer-to-peer OLAP" ... A model for multidimensional data distributed in a P2P network, and a query rewriting technique, that allows a local peer to propagate OLAP queries among its ...Web
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In this paper, we propose PACA, a probably approximately correct aggregate query processing scheme, for answering aggregate queries in structured Peer-to …Web
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You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.Web
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Introducing the highly constrained distributed computing platform that sensor networks give rise to.Outline the challenges in conducting in-network query processing in WSNpared state-of-the-art SNQPs in terms of their query language, compiler ...Web
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In this paper, we outline our efficient sample-based approach to answer fixed-precision approximate continuous aggregate queries in peer-to-peer databases. We describe our approach in the context of Digest, a two-tier system we have developed for correct and efficient query answering by sampling.Web
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Keywords : Random Walk, Query Processing Introduction Peer-to-Peer Databases: The peer-to-peer systems mature beyond file sharing applications and network model is quickly becoming the prefert getting deployed in increasingly sophisticated e- medium for file sharing and distributing data over the business and scientific environments ...Web
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