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Communicating Quality of Service Requirements to an Object-Based Storage Device

9 years 7 months ago
Communicating Quality of Service Requirements to an Object-Based Storage Device
Obtaining consistent bandwidth with predictable latency from disk-based storage systems has proven difficult due to the storage system’s inability to understand Quality of Service (QoS) requirements. In this paper, we present a feasibility study of QoS with the Object-based Storage Device (OSD) specification. We look at OSD’s ability to provide QoS guarantees for consistent bandwidth with predictable latency. Included in this paper is a description of QoS requirements of a sample application and how these requirements are translated into parameters that are then communicated to, and interpreted by, the OSD. Implementation problems lead to the failure of a hard real-time QoS model, but this failure is not due to the OSD protocol. The paper concludes with a description of how well the Revision 9 OSD standard (OSDR9) is able to accommodate QoS. We provide suggestions for improving the OSD specification and its ability to communicate QoS requirements.
Kevin KleinOsowski, Thomas Ruwart, David J. Lilja
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Where MSS
Authors Kevin KleinOsowski, Thomas Ruwart, David J. Lilja
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