[PDF] Content-Based Routing of Path Queries in...

Peer-to-peer (P2P) systems are gaining increasing popularity as a scalable means to share data among a large number of autonomous nodes. Our experimental results show that multi-level Bloom filters outperform the classical Bloom filters in routing path queries.

Query Routing and Processing in Peer-To-Peer Data Sharing Systems

Query routing and processing are two problems affected by the absence of a global catalog. Locating relevant data sources and generating a close to optimal execution plan become more difficult. In this paper, we concentrate our study on proposed solutions for the both problems.

Working with SOQL Aggregate Functions | Apex Developer Guide

Queries that include aggregate functions are still subject to the limit on total number of query rows. All aggregate functions other than COUNT() or COUNT(fieldname) include each row used by the aggregation as a query row for the purposes of limit tracking.

NSF Award Search: Award#0916488 - III: Small: Efficient ...

ABSTRACT When dealing with massive quantities of data, ranking and aggregate queries are powerful techniques for focusing attention on the most important answers. Many applications that produce such massive quantities of data inherently introduce uncertainty in the same time, for example, probabilistic match in data integration, imprecise measurements from sensors, …

Aggregate Query Processing In Peer To Peer Source

Aggregate Query Processing In Peer To Peer We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment.

Progressive approximate aggregate queries with a multi ...

Answering aggregate queries like SUM, COUNT, MIN, MAX, AVG in an approximate manner is often desirable when the exact answer is not needed or too costly to compute. We present an algorithm for answering such queries in multi-dimensional databases, using selective traversal of a Multi-Resolution Aggregate (MRA) tree structure storing point data.

RPK-table based efficient algorithm for join-aggregate query ...

Jan 01, 2016 · Join-aggregate query which returns aggregate information on the join of several tables is widely used in big data analysis. For instance, many TPC-H 1 queries contain joinaggregate operation for performance evaluation. However, it is time-consuming to run join-aggregate query in existing systems like Hive and Pig .

Deciding equivalences among conjunctive aggregate queries ...

Equivalence of aggregate queries is investigated for the class of conjunctive queries with comparisons and the aggregate operators count, count-distinct, min, max, and sum. Essentially, this class contains unnested SQL queries with the above aggregate operators, with a where clause consisting of a conjunction of comparisons, and without a ...

probabilistic thresholdrange aggregate query processing over ...

Select Publications - UNSW Research | UNSW Research. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—The importance of query processing over uncertain data has recently arisen due to its wide usage in many real-world applications.

What is Peer-to-Peer... - Definition from Techopedia

Peer-to-peer architecture (P2P architecture) is a commonly used computer networking architecture in which each workstation, or node, has the same capabilities and responsibilities. It is often compared and contrasted to the classic client/server...

Processing Complex Aggregate Queries over Data Streams

sults to user queries while looking at the relevant data items only once and in a fixed order (determined by the stream-arrival pattern). Two key parameters for query processing over continuous data-streams are (1) the amount of memory made available to the on-line algorithm, and (2) the per-item processing timerequired by the query processor.

Aggregate Query Answering under Uncertain Schema Mappings

aggregate queries: the range, distribution, and expected value semantics, and show that these three semantics combine with the by-table and by-tuple semantics in six ways. We present algorithms to process COUNT, AVG, SUM, MIN, and MAX queries under all six semantics and develop results on the complexity of processing such queries under all six ...

PDF Approximating Aggregation Queries in Peer-to-Peer Networks

Peer-to-Peer Databases: The peer-to-peer network model is quickly becoming the preferred medium for file sharing and distributing data Approximate Query Processing: Fortunately, it has been observed that in most typical data analysis and data mining...

CiteSeerX — TECHNOLOGY Aggregate Query Processing using ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Peer-to-peer (P2P) network is increasingly becoming popular because it offers oppor¬tunities for real-time communication, ad-hoc collaboration and information sharing in a large-scale distributed environment. Peer-to-peer computing is defined as the sharing of computer resources and …

Using Pre-aggregation for Efficient Spatial Query ...

Jul 06, 2005 · Abstract. Many applications using sensing data require the fast retrieval of aggregated information in sensor networks. In this paper, distributed spatial index structure in sensor networks for time-efficient aggregation query processing is proposed.

Analysis of Search and Replication in Unstructured Peer ...

Analysis of Search and Replication in Unstructured Peer-to-Peer Networks Saurabh Tewari, Leonard Kleinrock ... ABSTRACT This paper investigates the effect of the number of file replicas on search performance in unstructured peer-to-peer networks. We observe that for a search network with a random graph topology ... The query-processing load for ...

Minimization of Delay for Query Processing in Peer to Peer...

In peer to peer database system, network topology should be discovered, acquaintances and mapping tables was created and the [19] Chrysakis I. y Plexousakis D., Semantic Query Routing and Distributed Top-k Query Processing in Peer-to-Peer Networks...

CiteSeerX — Search Results — Aggregate Queries, Progressive ...

Progressive Approximate Aggregate Queries with a Multi-Resolution Tree Structure by Iosif Lazaridis, Sharad Mehrotra , 2001 Answering aggregate queries like SUM, COUNT, MIN, MAX, AVG in an approximate manner is often desirable when the exact answer is not needed or too costly to compute.

Aggregate Queries in Peer-to-Peer OLAP Mauricio Minuto Espil...

8 peer-to-peer OLAP fact peers dimension peers aggregate P2P OLAP queries complete and certain query answers model (defines): autonomous peer data management three phase peer to peer coordination cooperative query...

Peer-to-Peer Transactional Replication - SQL... | Microsoft Docs

Peer-to-peer replication provides a scale-out and high-availability solution by maintaining copies of data across multiple server instances, also referred to as nodes. Built on the foundation of transactional replication...