Nov 4 – 8, 2019
Adelaide Convention Centre
Australia/Adelaide timezone

Lightweight dynamic integration of opportunistic resources

Nov 7, 2019, 2:00 PM
15m
Riverbank R7 (Adelaide Convention Centre)

Riverbank R7

Adelaide Convention Centre

Oral Track 7 – Facilities, Clouds and Containers Track 7 – Facilities, Clouds and Containers

Speaker

Max Fischer (Karlsruhe Institute of Technology)

Description

Dynamic resource provisioning in the WLCG is commonly based on meta-scheduling and the pilot model. For a given set of workflows, a meta-scheduler computes the ideal set of resources; so-called pilot jobs integrate these resources into an overlay batch system, which then processes the initial workflows. While offering a high level of control and precision, the strong coupling between components limits scalability, flexibility and robustness. These shortcommings are more severe when workflows and resources are under limited control - such as a WLCG site executing anonymous pilot jobs on external, non-WLCG resources.

In order to integrate dynamic resources, the GridKa Tier 1 centre has developed a new approach for dynamic provisioning that is suitable for the WLCG and beyond. By design, our approach decouples the distinct responsibilities of workflow scheduling, resource provisioning and meta-scheduling. Instead of seeking an optimal solution for a coupled scheduling and meta-scheduling problem, we divide the task into composable but isolated, self-balancing domains. Not only does this naturally provide scalability, flexibility and robustness, it also allows us to manage a variety of resources and situations in a common way. We have successfully used our work for provisiong HPC and Cloud resources to the WLCG, as well as managing abstract resources in the form of Multi-Core and Single-Core allocations.

This contribution discusses the benefits and limitations of our new approach to dynamic resource provisioning and compared to competing approaches.

Consider for promotion Yes

Primary authors

Max Fischer (Karlsruhe Institute of Technology) Eileen Kuehn (Karlsruhe Institute of Technology) Manuel Giffels (KIT - Karlsruhe Institute of Technology (DE)) Matthias Jochen Schnepf (KIT - Karlsruhe Institute of Technology (DE))

Co-authors

Andreas Petzold (KIT - Karlsruhe Institute of Technology (DE)) Andreas Heiss (KIT - Karlsruhe Institute of Technology (DE))

Presentation materials