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Displaying 1-21 out of 21 total
Towards dynamic pricing-based collaborative optimizations for green data centers
Found in: 2013 IEEE 29th International Conference on Data Engineering Workshops (ICDEW)
By Yang Li,David Chiu,Changbin Liu,Linh T.X. Phan,Tanveer Gill,Sanchit Aggarwal,Zhuoyao Zhang,Boon Thau Loo,David Maier,Bart McManus
Issue Date:April 2013
pp. 272-278
Increased demand for cloud computing services has ushered power management schemes into the frontlines of data center research. Meanwhile, market penetration of intermittent renewable energy sources (e.g., wind and solar) is on the rise. While clean and ab...
Web-Based Mathematics Education with MathChat
Found in: Information Technology: Coding and Computing, International Conference on
By David Chiu
Issue Date:April 2004
pp. 709
MathChat is a protocol to support web-based chat sessions to simulate a classroom-type environment enabled for mathematics education. With MeML support, MathChat allows mathematics computation and display, which empowers mathematics educators to hold lectu...
Cost and Accuracy Aware Scientific Workflow Composition for Service-Oriented Environments
Found in: IEEE Transactions on Services Computing
By David Chiu,Gagan Agrawal
Issue Date:October 2013
pp. 470-483
Large-scale scientific data analysis projects have catalyzed service-based workflow management systems. We present an approach for integrating user preferences on completion time and workflow accuracy in a workflow composition system. The relationship betw...
Integrating Online Compression to Accelerate Large-Scale Data Analytics Applications
Found in: 2013 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
By Tekin Bicer,Jian Yin,David Chiu,Gagan Agrawal,Karen Schuchardt
Issue Date:May 2013
pp. 1205-1216
Compute cycles in high performance systems are increasing at a much faster pace than both storage and wide area bandwidths. To continue improving the performance of large-scale data analytics applications, compression has therefore become promising approac...
Reconciling Cost and Performance Objectives for Elastic Web Caches
Found in: 2012 International Conference on Cloud and Service Computing (CSC)
By Farhana Kabir,David Chiu
Issue Date:November 2012
pp. 88-95
Web and service applications are generally I/O bound and follow a Zipf-like request distribution, ushering in potential for significant latency reduction by caching and reusing results. However, such web caches require manual resource allocation, and when ...
Time and Cost Sensitive Data-Intensive Computing on Hybrid Clouds
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Tekin Bicer,David Chiu,Gagan Agrawal
Issue Date:May 2012
pp. 636-643
Purpose-built clusters permeate many of today's organizations, providing both large-scale data storage and computing. Within local clusters, competition for resources complicates applications with deadlines. However, given the emergence of the cloud's pay-...
A Framework for Data-Intensive Computing with Cloud Bursting
Found in: Cluster Computing, IEEE International Conference on
By Tekin Bicer,David Chiu,Gagan Agrawal
Issue Date:September 2011
pp. 169-177
For many organizations, one attractive use of cloud resources can be through what is referred to as cloud bursting or the hybrid cloud. These refer to scenarios where an organization acquires and manages in-house resources to meet its base need, but can us...
Evaluating and Optimizing Indexing Schemes for a Cloud-Based Elastic Key-Value Store
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By David Chiu, Apeksha Shetty, Gagan Agrawal
Issue Date:May 2011
pp. 362-371
Cloud computing has emerged to provide virtual, pay-as-you-go computing and storage services over the Internet, where the usage cost directly depends on consumption. One compelling feature in Clouds is elasticity, where a user can demand, and be immediatel...
A Dynamic Approach toward QoS-Aware Service Workflow Composition
Found in: Web Services, IEEE International Conference on
By David Chiu, Sagar Deshpande, Gagan Agrawal, Rongxing Li
Issue Date:July 2009
pp. 655-662
Web service-based workflow management systems have garnered considerable attention for automating and scheduling dependent operations. Such systems often support user preferences, e.g., time of completion, but with the rebirth of distributed computing via ...
Hierarchical Caches for Grid Workflows
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By David Chiu, Gagan Agrawal
Issue Date:May 2009
pp. 228-235
From personal software to advanced systems, caching mechanisms have steadfastly been a ubiquitous means for reducing workloads. It is no surprise, then, that under the grid and cluster paradigms, middlewares and other large-scale applications often seek ca...
Incremental Quantization for Aging Data Streams
Found in: Data Mining Workshops, International Conference on
By Fatih Altiparmak, David Chiu, Hakan Ferhatosmanoglu
Issue Date:October 2007
pp. 527-532
A growing number of applications have become reliant or can benefit from monitoring data streams. Data streams are potentially unbounded in size, hence, Data Stream Man- agement Systems generally maintain a
Elastic Cloud Caches for Accelerating Service-Oriented Computations
Found in: SC Conference
By David Chiu, Apeksha Shetty, Gagan Agrawal
Issue Date:November 2010
pp. 1-11
Computing as a utility, that is, on-demand access to computing and storage infrastructure, has emerged in the form of the Cloud. In this model of computing, elastic resource allocation, i.e., the ability to scale resource allocation for specific applicatio...
A tunable compression framework for bitmap indices
Found in: 2014 IEEE 30th International Conference on Data Engineering (ICDE)
By Gheorghi Guzun,Guadalupe Canahuate,David Chiu,Jason Sawin
Issue Date:March 2014
pp. 484-495
Bitmap indices are widely used for large read-only repositories in data warehouses and scientific databases. Their binary representation allows for the use of bitwise operations and specialized run-length compression techniques. Due to a trade-off between ...
Dynamic bitmap index recompression through workload-based optimizations
Found in: Proceedings of the 17th International Database Engineering & Applications Symposium (IDEAS '13)
By David Chiu, Gheorghi Guzun, Guadalupe Canahuate, Jason Sawin, Brasil Perez Lukes, Fredton Doan
Issue Date:October 2013
pp. 96-105
Many large-scale read-only databases and data warehouses use bitmap indices in an effort to speed up data analysis. These indices have the dual properties of compressibility and being able to leverage fast bit-wise operations for query processing. Numerous...
Poster: a framework for data-intensive computing with cloud bursting
Found in: Proceedings of the 2011 companion on High Performance Computing Networking, Storage and Analysis Companion (SC '11 Companion)
By David Chiu, Gagan Agrawal, Tekin Bicer
Issue Date:November 2011
pp. 5-6
In this work, we consider the challenge of data analysis in a scenario where data is stored across a local cluster and cloud resources. We describe a software framework to enable data-intensive computing with cloud bursting, i.e., using a combination of co...
MATE-EC2: a middleware for processing data with AWS
Found in: Proceedings of the 2011 ACM international workshop on Many task computing on grids and supercomputers (MTAGS '11)
By David Chiu, Gagan Agrawal, Tekin Bicer
Issue Date:November 2011
pp. 59-68
Recently, there has been growing interest in using Cloud resources for a variety of high performance and data-intensive applications. While there is currently a number of commercial Cloud service providers, Amazon Web Services (AWS) appears to be the most ...
An approach towards automatic workflow composition through information retrieval
Found in: Proceedings of the 15th Symposium on International Database Engineering & Applications (IDEAS '11)
By David Chiu, Farhana Kabir, Gagan Agrawal, Travis Hall
Issue Date:September 2011
pp. 170-178
Understanding how to design, manage, and execute scientific workflows has become increasingly esoteric. Yet, despite the development of scientific workflow management systems, which have simplified workflow planning to some extent, a means to reduce the co...
Profile Hiroshi Ishii: tangible bits
Found in: XRDS: Crossroads, The ACM Magazine for Students
By David Chiu
Issue Date:June 2010
pp. 49-49
Techniques and devices are being developed to better suit what we think of as the new smallness.
Elasticity in the cloud
Found in: Crossroads
By David Chiu
Issue Date:March 2010
pp. 3-4
After reading this issue, I had to seriously reevaluate my perception and definition of cloud computing. Unsurprisingly, given the wide array of computing models it encompasses, agreement among even experts is somewhat elusive.
On teaching computer science: thoughts and advice for TAs
Found in: Crossroads
By David Chiu
Issue Date:December 2008
pp. 25-26
Computational semantics has become an interesting and important branch of computational linguistics. Born from the fusion of formal semantics and computer science, it is concerned with the automated processing of meaning associated with natural language ex...
Composing geoinformatics workflows with user preferences
Found in: Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems (GIS '08)
By David Chiu, Gagan Agrawal, Rongxing Li, Sagar Deshpande
Issue Date:November 2008
pp. 1-8
With the advent of the data grid came a novel distributed scientific computing paradigm known as service-oriented science. Among the plethora of systems included under this framework are scientific workflow management systems, which enable large-scale proc...