Design and implementation of a parallel I/O runtime system for irregular applications

Jaechun No*, Sung soon Park, Jesus Carretero, Alok Choudhary, Pang Chen

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


In this paper we present the design, implementation and evaluation of a runtime system based on collective I/O techniques for irregular applications. We present two models, namely, `Collective I/O' and `Pipelined Collective I/O'. In the first scheme, all processors participate in the I/O simultaneously, making scheduling of I/O requests simpler but creating a possibility of contention at the I/O nodes. In the second approach, processors are grouped into several groups, so that only one group performs I/O simultaneously, while the next group performs communication to rearrange data, and this entire process is pipelined to reduce I/O node contention dynamically. Both models have been optimized by using software caching, chunking and on-line compression mechanisms. We demonstrate that we can obtain significantly high-performance for I/O above what has been possible so far. The performance results are presented on an Intel Paragon and on the ASCI/Red teraflops machine at Sandia National Labs.

Original languageEnglish (US)
Pages (from-to)280-284
Number of pages5
JournalProceedings of the International Parallel Processing Symposium, IPPS
StatePublished - 1998
EventProceedings of the 1998 12th International Parallel Processing Symposium and 9th Symposium on Parallel and Distributed Processing - Orlando, FL, USA
Duration: Mar 30 1998Apr 3 1998

ASJC Scopus subject areas

  • Hardware and Architecture


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