SCHEDULE: NOV 12-18, 2011

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Server-Side I/O Coordination for Parallel File Systems

SESSION: Coordinating I/O

EVENT TYPE: Paper

TIME: 1:30PM - 2:00PM

AUTHOR(S):Huaiming Song, Yanlong Yin, Xian-He Sun, Rajeev Thakur, Samuel Lang

ROOM:TCC 305

ABSTRACT:
Parallel file systems have become a common component of modern high-end computers. However, current parallel file systems lack the ability to effectively handle concurrent I/O requests with data synchronization needs, whereas concurrent I/O requests are the norm in data-intensive applications. Recognizing that an I/O request will not complete until all involved file servers have completed their parts, in this paper we propose a server-side I/O coordination scheme for parallel file systems. The basic idea is to coordinate file servers to serve one application at a time in order to reduce the completion time, and in the meantime maintain the server utilization and fairness. We present the I/O coordination algorithm and its corresponding analysis of completion time. We also implement a prototype of the proposed scheme under the PVFS2 file system and MPI-IO environment. Experimental results demonstrate that the proposed scheme can reduce average completion time by 8% to 46%.

Chair/Author Details:

Huaiming Song - Dawning Information Industrial co., Ltd

Yanlong Yin - Illinois Institute of Technology

Xian-He Sun - Illinois Institute of Technology

Rajeev Thakur - Argonne National Laboratory

Samuel Lang - Argonne National Laboratory

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The full paper can be found in the ACM Digital Library