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Dynamic Migration of Processing Elements for Optimized Query Execution in Event-Based Systems [chapter]

Waldemar Hummer, Philipp Leitner, Benjamin Satzger, Schahram Dustdar
2011 Lecture Notes in Computer Science  
We focus on the case that multiple users run different continuous Complex Event Processing (CEP) queries over various event streams.  ...  This paper proposes a method for optimized placement of query processing elements in a distributed stream processing platform consisting of several computing nodes.  ...  In our model, a number of aggregator nodes (A) are collectively responsible to execute multiple continuous user queries (Q).  ... 
doi:10.1007/978-3-642-25106-1_3 fatcat:jmyles34rjae7n4u2b2hnxzlwe

HiFiA Unified Architecture for High Fan-in Systems (System Demonstration) [chapter]

O COOPER, A EDAKKUNNI, M FRANKLIN, W HONG, S JEFFERY, S KRISHNAMURTHY, F REISS, S RIZVI, E WU
2004 Proceedings 2004 VLDB Conference  
We demonstrate an initial prototype of HiFi that uses data stream query processing to acquire, filter, and aggregate data from multiple devices including sensor motes, RFID readers, and low power gateways  ...  networks and RFID readers and whose interior nodes consist of traditional host computers organized using the principle of successive aggregation.  ...  readings across multiple streams and device types and successive levels of aggregation.  ... 
doi:10.1016/b978-012088469-8/50146-7 fatcat:pzp3wwau3feahcs3ivkpd3cyqi

OPTIMIZED INTENTION FOR CONTINUOUS QUERIES IN THE ACTIVE DATA AGGREGATION NETWORK WITH COST MODEL

INDUMATHI. R
2015 International journal of computer and communication technology  
Here the aim is to introduce the low-cost, scalable technique to answer continuous aggregation queries using a network of aggregators of dynamic data items.  ...  These queries are referred to as the continuous queries since they continually produce results whenever new data arrives or existing data changes.  ...  Although a query can be divided in such a way that a single data item is served by multiple; but in doing so the same data item needs to be processed at multiple aggregators, increasing the unnecessary  ... 
doi:10.47893/ijcct.2015.1300 fatcat:kughroydure6vnw6sawev24zkm

How to Fit when No One Size Fits

Harold Lim, Yuzhang Han, Shivnath Babu
2013 Conference on Innovative Data Systems Research  
We are taking the DBMS + approach in a platform, called Cyclops, that we are building for continuous query execution.  ...  It can be hard for an application developer to pick one system when the needs of her application match the features of multiple "one size" systems.  ...  To further show that "no one size fits" for processing continuous queries, we ran windowed aggregation queries with different combinations of characteristics.  ... 
dblp:conf/cidr/LimHB13 fatcat:o5267avbeffazmnulez26d7ume

Efficient Processing of Queries using Filtered Bitmap Index with Multi-Join Multiple Set Predicates

2019 VOLUME-8 ISSUE-10, AUGUST 2019, REGULAR ISSUE  
If the result exists then only continue the join processing in the rewritten query, by taking the next lower level table from the complex query and do the execution.  ...  It will further degrade when the amount of joins in the queries is increased. These problems emphasize a need for good query processing approach.  ...  Otherwise, if the result exists then only continue the join processing in the rewritten query, by taking the next lower level table from the complex query and do the execution. IV.  ... 
doi:10.35940/ijitee.j1065.08810s19 fatcat:6btu6hfipvc2ddpp2wguhprqdi

Distributed continuous queries over Web service event streams

Waldemar Hummer, Benjamin Satzger, Philipp Leitner, Christian Inzinger, Schahram Dustdar
2011 2011 7th International Conference on Next Generation Web Services Practices  
We present a distributed query platform that tackles these problems. Our novel query model permits to specify inputs that provide data for other inputs and need to be processed first.  ...  We evaluate several aspects of our prototype in a Cloud computing environment.  ...  The fundamental assumption of WS-Aggregation is therefore that multiple aggregator machines collaboratively process the queries and events requested by the clients.  ... 
doi:10.1109/nwesp.2011.6088173 fatcat:kajupqkqbrcgpbinwpgdukvuf4

Collaboratively Querying Sensor Networks through Handheld Devices

Tsz Wai Chiu, Qiong Luo
2007 2007 International Conference on Mobile Data Management  
One of the main features of WinyDB is that multiple PDAs running WinyDB can answer queries collaboratively. This feature is useful in that it improves both the power efficiency and the data quality.  ...  Therefore, we propose WinyDB, a relational query processing system on Windows-CE based PDAs (Personal Digital Assistants) for sensor networks.  ...  conjunct is less restrictive than one of A's, and (3) if A is a continuous query, its sample period is a multiple of B's.  ... 
doi:10.1109/mdm.2007.14 dblp:conf/mdm/ChiuL07 fatcat:zx4nfbwa6vftllp2v6ner5gko4

A Study of Approximate Data Management Techniques for Sensor Networks

Adonis Skordylis
2006 2006 International Workshop on Intelligent Solutions in Embedded Systems  
A large variety of applications could benefit from the pervasive deployment of inexpensive wireless sensor nodes, ranging from environmental monitoring to emergency detection and response.  ...  Recent developments in sensor network technology have enabled the instrumentation of the physical world with smart devices for monitoring purposes.  ...  Additional communication savings can be achieved by combining the processing of multiple aggregate queries over a fixed communication tree [6] .  ... 
doi:10.1109/wises.2006.237157 fatcat:ggs3mikolneerev7et4gextwcu

A Study of Approximate Data Management Techniques for Sensor Networks

Adonis Skordylis, Niki Trigoni, Alexandre Guitton
2006 2006 International Workshop on Intelligent Solutions in Embedded Systems  
A large variety of applications could benefit from the pervasive deployment of inexpensive wireless sensor nodes, ranging from environmental monitoring to emergency detection and response.  ...  Recent developments in sensor network technology have enabled the instrumentation of the physical world with smart devices for monitoring purposes.  ...  Additional communication savings can be achieved by combining the processing of multiple aggregate queries over a fixed communication tree [6] .  ... 
doi:10.1109/wises.2006.329119 dblp:conf/wises/SkordylisTG06 fatcat:ay3klpfembarrguz7oi2ktdysq

Online Aggregation based Approximate Query Processing: A Literature Survey [article]

Pritom Saha Akash, Wei-Cheng Lai, Po-Wen Lin
2022 arXiv   pre-print
Online aggregation-based AQP progressively generates approximate results with some error estimates (i.e., confidence interval) until the processing of all data is done.  ...  An approximate query process (AQP) was proposed to efficiently compute approximate values as close as to the exact answer.  ...  Sample problem happens in case of online aggregation associated with join queries of multiple tables.  ... 
arXiv:2204.07125v1 fatcat:tdey5uh3szcjhbc3pskwcbf2wa

Information Extraction from Large-scale WSNs: Approaches and Research Issues Part II: Query-Based and Macroprogramming Approaches

Tessa DANIEL, Elena GAURA
2008 Sensors & Transducers  
Part III highlights the open research questions and issues faced by deployable WSN system designers and discusses the potential benefits of both in-network processing and complex querying for large scale  ...  This suite of three papers (Part I-III) offers an extensive survey of the literature in the area of WSN information extraction, covering in Part I and Part II the three main approaches above.  ...  Although a viable approach for continuous queries it does not address complex queries or even aggregate type queries to any great extent and is more concerned with managing simple query processing over  ... 
doaj:13c80d1e78db4dffaebddfd20375edbb fatcat:lb6haxpyknfudasx4uviljdzpm

Real Time Business Performance Monitoring and Analysis Using Metric Network

Pu Huang, Hui Lei, Lipyeow Lim
2006 2006 IEEE International Conference on e-Business Engineering (ICEBE'06)  
A metric network consists of metrics, metric repositories, aggregation agents, and knowledge agents.  ...  To do so, performance measures need to be collected from daily operations and aggregated to construct higher-level Key Performance Indicators (KPIs) in nearly real time.  ...  Existing techniques from query processing and optimization in data streams and continuous queries readily apply.  ... 
doi:10.1109/icebe.2006.84 dblp:conf/icebe/HuangLL06 fatcat:fghhoihx2rdi5lawo2cixtlqpa

Bi-Level Online Aggregation on Raw Data

Yu Cheng, Weijie Zhao, Florin Rusu
2017 Proceedings of the 29th International Conference on Scientific and Statistical Database Management - SSDBM '17  
The performance of in-situ processing across a query workload is, however, limited by the speed of full scan, tokenizing, and parsing of the entire data.  ...  Online aggregation (OLA) has been introduced as an efficient method for data exploration that identifies uninteresting patterns faster by continuously estimating the result of a computation during the  ...  Department of Energy Early Career Award (DOE Career).  ... 
doi:10.1145/3085504.3085514 dblp:conf/ssdbm/ChengZR17 fatcat:c62uqxxufnfnfkykhtm5o7lhqa

Parallel online aggregation in action

Chengjie Qin, Florin Rusu
2013 Proceedings of the 25th International Conference on Scientific and Statistical Database Management - SSDBM  
Online aggregation provides continuous estimates to the final result of a computation during the actual processing.  ...  Demonstration participants are shown how estimates to general SQL aggregation queries over terabytes of TPC-H data are generated during the entire processing.  ...  The process is executed level by level starting from the leaves, with the final result computed at the root of the tree.  ... 
doi:10.1145/2484838.2484874 dblp:conf/ssdbm/QinR13 fatcat:k6j55dowwbe2zmwnuwvwodkhfm

A System Of Operations On Sliding Windows

Anita Dani, Janusz Get
2006 2006 International Conference on Advanced Computing and Communications  
In this paper, we propose a system of operators to process a continuous query on sliding windows over streaming data.  ...  One of the distinguishing characteristics of a data stream system is 'a continuous query operating on dynamic data' as opposed to 'static data processed by instantaneous query' in DBMS.  ...  The model consists of three layers of operations required for processing a continuous query.  ... 
doi:10.1109/adcom.2006.4289961 fatcat:xiakbs5cmrhfdied6cbygdi35m
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