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IEEE Cluster 2013 Conference
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Wednesday, September 25 • 11:30am - 11:55am
Distributed Resource Exchange: Virtualized Resource Management for SR-IOV InfiniBand Clusters

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The commoditization of high performance inter- connects, like 40+ Gbps InfiniBand, and the emergence of low- overhead I/O virtualization solutions based on SR-IOV, is enabling the proliferation of such fabrics in virtualized datacenters and cloud computing platforms. As a result, such platforms are better equipped to execute workloads with diverse I/O requirements, ranging from throughput-intensive applications, such as ‘big data’ analytics, to latency-sensitive applications, such as online applications with strict response-time guarantees. Improvements are also seen for the virtualization infrastructures used in datacenter settings, where high virtualized I/O performance supported by high-end fabrics enables more applications to be configured and deployed in multiple VMs – VM ensembles (VMEs) – distributed and communicating across multiple datacenter nodes. A challenge for I/O-intensive VM ensembles is the efficient management of the virtualized I/O and compute resources they share with other consolidated applications, particularly in lieu of VME-level SLA requirements like those pertaining to low or predictable end-to-end latencies for applications comprised of sets of interacting services.

This paper addresses this challenge by presenting a management solution able to consider such SLA requirements, by supporting diverse SLA-aware policies, such as those maintaining bounded SLA guarantees for all VMEs, or those that minimize the impact of misbehaving VMEs. The management solution, termed Distributed Resource Exchange (DRX), borrows techniques from principles of microeconomics, and uses online resource pricing methods to provide mechanisms for such distributed and coordinated resource management. DRX and its mechanisms allow policies to be deployed on such a cluster in order to provide SLA guarantees to some applications by charging all the interfering VMEs ‘equally’ or based on the ‘hurt’, i.e. amount of I/O performed by the VMEs. While these mechanisms are general, our implementation is specifically for SR-IOV-based fabrics like InfiniBand and the KVM hypervisor. Our experimental evaluation consists of workloads representative of data-analytics, transactional and parallel benchmarks. The results demonstrate the feasibility of DRX and its utility to maintain SLA for transactional applications. We also show that the impact to the interfering workloads is also within acceptable bounds for certain policies.

Wednesday September 25, 2013 11:30am - 11:55am
12th Floor - Circle City 12 (Hilton) 120 W. Market St, Indianapolis, IN