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| Content Provider | Springer Nature Link |
|---|---|
| Author | Oliveira, Daniel Ocaña, Kary A. C. S. Baião, Fernanda Mattoso, Marta |
| Copyright Year | 2012 |
| Abstract | In the last years, scientific workflows have emerged as a fundamental abstraction for structuring and executing scientific experiments in computational environments. Scientific workflows are becoming increasingly complex and more demanding in terms of computational resources, thus requiring the usage of parallel techniques and high performance computing (HPC) environments. Meanwhile, clouds have emerged as a new paradigm where resources are virtualized and provided on demand. By using clouds, scientists have expanded beyond single parallel computers to hundreds or even thousands of virtual machines. Although the initial focus of clouds was to provide high throughput computing, clouds are already being used to provide an HPC environment where elastic resources can be instantiated on demand during the course of a scientific workflow. However, this model also raises many open, yet important, challenges such as scheduling workflow activities. Scheduling parallel scientific workflows in the cloud is a very complex task since we have to take into account many different criteria and to explore the elasticity characteristic for optimizing workflow execution. In this paper, we introduce an adaptive scheduling heuristic for parallel execution of scientific workflows in the cloud that is based on three criteria: total execution time (makespan), reliability and financial cost. Besides scheduling workflow activities based on a 3-objective cost model, this approach also scales resources up and down according to the restrictions imposed by scientists before workflow execution. This tuning is based on provenance data captured and queried at runtime. We conducted a thorough validation of our approach using a real bioinformatics workflow. The experiments were performed in SciCumulus, a cloud workflow engine for managing scientific workflow execution. |
| Starting Page | 521 |
| Ending Page | 552 |
| Page Count | 32 |
| File Format | |
| ISSN | 15707873 |
| Journal | Journal of Grid Computing |
| Volume Number | 10 |
| Issue Number | 3 |
| e-ISSN | 15729184 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2012-08-25 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cloud computing Scientific workflow Scientific experiment Provenance Management of Computing and Information Systems Processor Architectures User Interfaces and Human Computer Interaction |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Networks and Communications Information Systems Software Hardware and Architecture |
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