Improving Testbed Infrastructure

Members and Collaborators


In this work we seek to improve the current testbed infrastructure, by making it more robust and more efficient.

Improving Node Allocation

In this project we examined the causes of resource allocation failures on DeterLab testbed and found three main culprits that create perceived resource oversubscription, even when available nodes exist: (1) overuse of mapping constraints by users, (2) testbed software errors and (3) suboptimal resource allocation. We proposed solutions that could resolve these issues and reduce allocation failures to 57.3% of the baseline. In the remaining cases, real resource oversubscription occurs. We examined testbed usage patterns and show that a small fraction of unfair projects starve others for resources under the current first-come-first-served allocation policy. Due to interactive use of testbeds traditional fair-sharing techniques are not suitable solutions. We then proposed two novel approaches – Take-a-Break and Borrow-and-Return – that temporarily pause long-running experiments. These approaches can reduce resource allocation failures to 25% of the baseline case by gently prolonging 1–2.5% of instances.

Software and Datasets


This material is based upon work supported by the Department of Homeland Security under the grant #N66001-07-C-2001. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Department of Homeland Security.