In This Message

Center Announcements
  – RHEL8 Upgrade on Summit (Aug 17-19)
  – 8th WACCPD Workshop at SC21 Call for Papers

Meetings & Workshops
  – 2021 CUDA Training Series (Aug 17 & Sep 14)
  – CMake Training (Aug 23-26)
  – Kokkos Training (Aug 17 & 19)
  – Slate Workshop (Aug 25-26)
  – 2021 GPU Hackathons

Upcoming Scheduled Outages
  – Home (Aug 11)
  – Summit (Aug 17-19)
  – Andes, Spock, DTNs, Alpine (Aug 17)

Center Announcem

RHEL8 Upgrade on Summit (Aug 17-19)
Summit will be unavailable from 8:00 AM on Tuesday, August 17 until 8:00 AM on Thursday, August 19. During this time the OS will be upgraded to RHEL 8. Software changes related to this upgrade (both the available modules and the default versions) are noted on the Software News page. We strongly recommend that you recompile any codes you will run on the upgraded system following the outage. If you have any questions or concerns about this upgrade, contact the User Assistance Center at

8th WACCPD Workshop at SC21 Call for Papers
The Call for Papers for the 8th Workshop on Accelerator Programming using Directives is now open! The workshop aims to showcase all aspects of accelerator programming for heterogeneous systems such as innovative high-level language or library approaches, lessons learned while using directives or other portable approaches to migrate scientific legacy code to modern systems, and compilation and runtime scheduling techniques. The paper submission deadline is August 27, 2021 AOE. For more information, see

Meetings & Workshops

2021 CUDA Training Series (Aug 17 & Sep 14)
NVIDIA will continue their CUDA Training Series with the webinars listed below. Each webinar will include a presentation and hands-on exercises. Webinars will be held from 1 PM to 3 PM (Eastern Time). More information about these sessions and recordings of previous sessions can be found at

  – CUDA Multi Process Service (Tuesday, August 17) Register here
  – CUDA Debugging (Tuesday, September 14) Register here
  – CUDA Graphs (Tuesday, September 14) Register here

CMake Workshop (Aug 23-26)
The OLCF is partnering with Kitware, ECP, ALCF, and NERSC to offer a 4-day CMake Training class on August 23-26. The class will be virtual and will use computational resources available at NERSC for the exercises. The training is targeted at a deeper understanding of CMake. It seeks to assist developers in learning how to resolve issues outside of their control, in addition to writing a build system generator capable of seamlessly configuring for multiple unique architectures with a variety of compilers. OLCF users are all welcome to join this training. Registration is limited and offered on a first come, first served basis. For more information or to register, visit

Kokkos Training (August 17 & 19)
OLCF will host a Kokkos workshop on August 17 & 19 from 1:00 PM – 4:30 PM (Eastern Time). This workshop is open to developers of ECP applications and software-technology projects who are already using Kokkos and want to port their code to next generation architectures and/or further optimize their code. Attendees are expected to already have some level of experience with Kokkos. The training will focus on performance and will teach attendees how to use Kokkos Tools to profile, tune, and debug code. The first session will cover new features that were added in the recent past. The second session will be hands-on with members of the Kokkos team helping application developers with their own codes. For more information or to register, visit

Slate Workshop (Aug 25-26)
OLCF will host a Slate workshop on August 25 and 26 from 1:00 PM until 3:00 PM (Eastern Time). This workshop aims to help OLCF/NCCS users and NCCS staff generate smoother workflows for their applications running on Summit and NCCS Open resources. Slate is a Kubernetes-based container orchestration service for users to run persistent application services that do not fit into a batch job (such as workflow management systems and data portals) with access to NCCS filesystems and cluster job queues. This will be a virtual workshop hosted on Zoom. For details and registration, see

2021 GPU Hackathons
The 2021 NVIDIA GPU Hackathon series is winding down. The final OLCF-supported Hackathon is the OLCF-hosted (virtual) Hackathon which will be held on October 18 and 25-27. The deadline to apply is August 18. For more information and to apply, go to

Upcoming Scheduled Outages

  • The general-purpose login server ( may be briefly unavailable between 4:00 PM and 6:00 PM on Wednesday, August 11.
  • Summit will be unavailable from 8:00 AM on Tuesday, August 17 until 8:00 AM on Thursday, August 19.
  • Andes, Spock, the Data Transfer Nodes, and the Alpine Filesystem will be unavailable from 8:00 AM until 4:00 PM on Tuesday, August 17.