Applications-driven parallel I/O

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:46242

Galbreath, N; Gropp, W; Levine, D ^[1]

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1. Argonne National Lab., IL (United States). Mathematics and Computer Science Division

The authors investigate the needs of some massively parallel applications running on distributed-memory parallel computers at Argonne National Laboratory and identify some common parallel I/O operations. For these operations, routines were developed that hide the details of the actual implementation (such as the number of parallel disks) from the application, while providing good performance. An important feature is the ability for the application programmer to specify that a file be accessed either as a high-performance parallel file or as a conventional Unix file, simply by changing the value of a parameter on the file open call. These routines are examples of a parallel I/O abstraction that can enhance development, portability, and performance of I/O operations in applications. Some of the specific issues in their design and implementation in a distributed-memory toolset are discussed.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 46242
• Report Number(s): CONF-931115--
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
COMPUTER CODES
COMPUTER OUTPUT DEVICES
DATA TRANSMISSION
MEMORY MANAGEMENT
PARALLEL PROCESSING
PERFORMANCE
TASK SCHEDULING