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Recently, a number of cloud platforms and services have been developed fordata intensive computing, including Hadoop, Sector, CloudStore (formerly KFS),HBase, and Thrift. In order to benchmark the performance of these systems, toinvestigate their interoperability, and to experiment with new services basedon flexible compute node and network provisioning capabilities, we havedesigned and implemented a large scale testbed called the Open Cloud Testbed(OCT). Currently the OCT has 120 nodes in four data centers: Baltimore, Chicago(two locations), and San Diego. In contrast to other cloud testbeds, which arein small geographic areas and which are based on commodity Internet services,the OCT is a wide area testbed and the four data centers are connected with ahigh performance 10Gb/s network, based on a foundation of dedicated lightpaths.This testbed can address the requirements of extremely large data streams thatchallenge other types of distributed infrastructure. We have also developedseveral utilities to support the development of cloud computing systems andservices, including novel node and network provisioning services, a monitoringsystem, and a RPC system. In this paper, we describe the OCT architecture andmonitoring system. We also describe some benchmarks that we developed and someinteroperability studies we performed using these benchmarks.

The Open Cloud Testbed: A Wide Area Testbed for Cloud Computing Utilizing High Performance Network Services