OVERSEE: Outsourcing Verification to Enable Resource Sharing in Edge Environment

Abstract

Multi-tenant (or colocation) data centers are good solutions to support edge computing, since each enterprise or organization usually has limited servers at an edge site. When any data center tenant faces a burst of workload, renting resources from the other tenants in the same data center can provide the required resources while keeping the merits of edge computing, but its challenges of reliability and performance are daunting. In this paper, we propose OVERSEE, an outsourcing verification mechanism that enables resource sharing in multi-tenant data centers, fully exploiting the benefits of edge computing. OVERSEE addresses the above two challenges by making skillful use of Intel SGX suite. OVERSEE consists of two sub schemes, the Report-Proof mechanism and Sampling-Challenging mechanism. The Report-Proof mechanism guarantees a task outsourced by a tenant can be executed correctly, i.e., completely and without modification, in the operating environment provided by another tenant. The Sampling-Challenging mechanism can be used to verify that sufficient computing capacity is provided to achieve the required QoS according to the resource lease agreement between the tenants. The theoretical analysis shows the effectiveness of OVERSEE and the experimental results show that it brings minimal overhead.