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SSUG::Digital: 004 – Update on Performance Enhancements in Spectrum Scale

10th September 2020 @ 16:00 - 17:30 BST

Update on File Create and MMAP performance, optimised code for small DIO.

Spectrum Scale is a highly scalable, high-performance storage solution for file and object storage. IBM continues to enhance Spectrum Scale performance, in response to recent hardware advancements and evolving workloads.
This presentation will discuss performance related improvements in Spectrum V5, focusing on enhancements made in support of AI and HPC use cases, including improvements to MMAP reads, file create performance, and small direct IO. In addition we will review some performance numbers measured on the IBM ESS 5000.

Download slides here


Q: ­I assume copy of these charts will be posted to Spectrum Scale User Group “Presentations” web page?
A: ­Yes, for all episodes the slides and video should be posted afterwards­.

Q: ­Please expand on other areas of performance improvements within GPFS that IBM is working on now­?
A: ­Which areas would you like to see improved?

Q: ­Will prefetch still happen after the slow second IO?
A: ­Regarding ‘will prefetch still happen after the slow second IO’ – I know that Ulf said we should handle any more prefetch questions in another talk, but let me just comment on one case:­ ­we make decisions to prefetch after the associated I/Os are complete, so prior to prefetch kicking in, a slow I/O might delay the decision to start prefetching­.

User group host: Simon Thompson


Speaker NamePhotoBio
John Lewars (IBM)John LewarsJohn Lewars is a Senior Technical Staff Member leading performance engineering work in the IBM Spectrum Scale development team. He has been with IBM for over 20 years, working first on several aspects of IBM's largest high performance computing systems, and later on the IBM Spectrum Scale (formerly GPFS) development team. John's work on the Spectrum Scale team includes working with large customer deployments and improving network resiliency, along with co-leading development of the team's first public cloud and container support deliverables.
Jürgen Hannappel (DESY)Jürgen Hannappel works in the scientific computing group of the DESY IT department on data management for EuXFEL and Petra III. With a background in particle physics his interests shifted towards computing over time as his place of work moved from CERN and Bonn University to DESY
Olaf Weiser (IBM)Olaf works with GPFS for over 15 years now. He started his GPFS career in one of the worlds biggest telecommunication companies as a technical administrator. Since more than 10 years, Olaf is with IBM as storage consultant and performance specialist. Recently, he joined IBM Research and Development and works on enhancements in Spectrum Scale to adopt client and customer's needs in the product.


10th September 2020
16:00 - 17:30 BST
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Digital Event


Spectrum Scale User Group