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2014 IEEE DOTNET DATA MINING PROJECT Adaptive join operators for result rate optimization on streaming inputs
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Adaptive Join Operators for Result Rate Optimization on
Streaming Inputs
Abstract
Adaptive join algorithms have recently attracted a lot of attention in emerging applications where
data are provided by autonomous data sources through heterogeneous network environments.
Their main advantage over traditional join techniques is that they can start producing join results
as soon as the first input tuples are available, thus, improving pipelining by smoothing join result
production and by masking source or network delays. In this paper, we first propose Double
Index NEsted-loops Reactive join (DINER), a new adaptive two-way join algorithm for result
rate maximization. DINER combines two key elements: an intuitive flushing policy that aims to
increase the productivity of in-memory tuples in producing results during the online phase of the
join, and a novel reentrant join technique that allows the algorithm to rapidly switch between
processing in-memory and disk-resident tuples, thus, better exploiting temporary delays when
new data are not available. We then extend the applicability of the proposed technique for a more
challenging setup: handling more than two inputs. Multiple Index NEsted-loop Reactive join
(MINER) is a multiway join operator that inherits its principles from DINER. Our experiments
2. using real and synthetic data sets demonstrate that DINER outperforms previous adaptive join
algorithms in producing result tuples at a significantly higher rate, while making better use of the
available memory. Our experiments also shows that in the presence of multiple inputs, MINER
manages to produce a high percentage of early results, outperforming existing techniques for
adaptive multiway join.
Existing System
Adaptive join algorithms have recently attracted a lot of attention in emerging applications where
data are provided by autonomous data sources through heterogeneous network environments.
Their main advantage over traditional join techniques is that they can start producing join results
as soon as the first input tuples are available, thus, improving pipelining by smoothing join result
production and by masking source or network delays.
Proposed System
In this paper, we first propose Double Index NEsted-loops Reactive join (DINER), a new
adaptive two-way join algorithm for result rate maximization. DINER combines two key
elements: an intuitive flushing policy that aims to increase the productivity of in-memory tuples
in producing results during the online phase of the join, and a novel reentrant join technique that
allows the algorithm to rapidly switch between processing in-memory and disk-resident tuples,
thus, better exploiting temporary delays when new data are not available. We then extend the
3. applicability of the proposed technique for a more challenging setup: handling more than two
inputs. Multiple Index NEsted-loop Reactive join (MINER) is a multiway join operator that
inherits its principles from DINER. Our experiments using real and synthetic data sets
demonstrate that DINER outperforms previous adaptive join algorithms in producing result
tuples at a significantly higher rate, while making better use of the available memory.
System Specification
Hardware Requirements:
• System : Pentium IV 2.4 GHz.
• Hard Disk : 40 GB.
• Floppy Drive : 1.44 Mb.
• Monitor : 14’ Colour Monitor.
• Mouse : Optical Mouse.
• Ram : 512 Mb.
Software Requirements:
• Operating system : Windows 7.
• Coding Language : ASP.Net with C#