Capability-based Scheduling of Scientific Workflows in the Cloud

Michel Krämer

2020

Abstract

We present a distributed task scheduling algorithm and a software architecture for a system executing scientific workflows in the Cloud. The main challenges we address are (i) capability-based scheduling, which means that individual workflow tasks may require specific capabilities from highly heterogeneous compute machines in the Cloud, (ii) a dynamic environment where resources can be added and removed on demand, (iii) scalability in terms of scientific workflows consisting of hundreds of thousands of tasks, and (iv) fault tolerance because in the Cloud, faults can happen at any time. Our software architecture consists of loosely coupled components communicating with each other through an event bus and a shared database. Workflow graphs are converted to process chains that can be scheduled independently. Our scheduling algorithm collects distinct required capability sets for the process chains, asks the agents which of these sets they can manage, and then assigns process chains accordingly. We present the results of four experiments we conducted to evaluate if our approach meets the aforementioned challenges. We finish the paper with a discussion, conclusions, and future research opportunities. An implementation of our algorithm and software architecture is publicly available with the open-source workflow management system “Steep”.

Paper Citation

in Harvard Style

Krämer M. (2020). Capability-based Scheduling of Scientific Workflows in the Cloud.In Proceedings of the 9th International Conference on Data Science, Technology and Applications - Volume 1: DATA, ISBN 978-989-758-440-4, pages 43-54. DOI: 10.5220/0009805400430054

in Bibtex Style

@conference{data20,
author={Michel Krämer},
title={Capability-based Scheduling of Scientific Workflows in the Cloud},
booktitle={Proceedings of the 9th International Conference on Data Science, Technology and Applications - Volume 1: DATA,},
year={2020},
pages={43-54},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009805400430054},
isbn={978-989-758-440-4},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 9th International Conference on Data Science, Technology and Applications - Volume 1: DATA,
TI - Capability-based Scheduling of Scientific Workflows in the Cloud
SN - 978-989-758-440-4
AU - Krämer M.
PY - 2020
SP - 43
EP - 54
DO - 10.5220/0009805400430054