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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
VERSION:1.0
BEGIN:VEVENT
DTSTART:20111115T213000Z
DTEND:20111115T220000Z
LOCATION:TCC 305
DESCRIPTION;ENCODING=QUOTED-PRINTABLE: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%.
SUMMARY:Server-Side I/O Coordination for Parallel File Systems
PRIORITY:3
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