Managing Hot Metadata for Scientific Workflows on Multisite Clouds

Luis Pineda-Morales (1, 2) , Ji Liu (2, 3, 4) , Alexandru Costan (1) , Esther Pacitti (3, 4) , Gabriel Antoniu (1) , Patrick Valduriez (3, 4) , Marta Mattoso (5)

1 KerData - Scalable Storage for Clouds and Beyond
2 MSR - INRIA - Microsoft Research - Inria Joint Centre
3 ZENITH - Scientific Data Management
4 IBC - Institut de Biologie Computationnelle
5 COPPE-UFRJ - Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia

Large-scale scientific applications are often expressed as workflows that help defining data dependencies between their different components. Several such workflows have huge storage and computation requirements, and so they need to be processed in multiple (cloud-federated) datacenters. It has been shown that efficient metadata handling plays a key role in the performance of computing systems. However, most of this evidence concern only single-site, HPC systems to date. In this paper, we present a hybrid decentralized/distributed model for handling hot metadata (frequently accessed metadata) in multisite architectures. We couple our model with a scientific workflow management system (SWfMS) to validate and tune its applicability to different real-life scientific scenarios. We show that efficient management of hot metadata improves the performance of SWfMS, reducing the workflow execution time up to 50% for highly parallel jobs and avoiding unnecessary cold metadata operations.

Mots clés: geo-distributed applications; scientific workflows; multisite clouds; metadata management; hot metadata

Domaines: Calcul parallèle, distribué et partagé [cs.DC]

Luis Pineda-Morales, Ji Liu, Alexandru Costan, Esther Pacitti, Gabriel Antoniu, et al.. Managing Hot Metadata for Scientific Workflows on Multisite Clouds. Big Data, Dec 2016, Washington, DC, United States. pp.390-397, ⟨10.1109/BigData.2016.7840628⟩. ⟨hal-01395715⟩