NDLI: MPI windows on storage for HPC applications

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MPI windows on storage for HPC applications

Content Provider	ACM Digital Library
Author	Kestor, Gokcen Rivas-Gomez, Sergio Gioiosa, Roberto Narasimhamurthy, Sai Laure, Erwin Peng, Ivy Bo Markidis, Stefano
Abstract	Upcoming HPC clusters will feature hybrid memories and storage devices per compute node. In this work, we propose to use the MPI one-sided communication model and MPI windows as unique interface for programming memory and storage. We describe the design and implementation of MPI windows on storage, and present its benefits for out-of-core execution, parallel I/O and fault-tolerance. Using a modified STREAM micro-benchmark, we measure the sustained bandwidth of MPI windows on storage against MPI memory windows and observe that only a 10% performance penalty is incurred. When using parallel file systems such as Lustre, asymmetric performance is observed with a 10% performance penalty in reading operations and a 90% in writing operations. Nonetheless, experimental results of a Distributed Hash Table and the HACC I/O kernel mini-application show that the overall penalty of MPI windows on storage can be negligible in most cases on real-world applications.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISBN	9781450348492
DOI	10.1145/3127024.3127034
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2017-09-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Out-of-core computation Parallel i/o Mpi windows on storage
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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