1. © 2008 IBM Corporation IBM Portfolio Update IDC User Forum John S. Zuk WW Portfolio & Strategy; Deep Computing

2. 2 Quad Mode  Previously called Virtual Node Mode  All four cores run one MPI process each  No threading  Memory / MPI process = ¼ node memory  MPI programming model Dual Mode  Two cores run one MPI process each  Each process may spawn one thread on core not used by other process  Memory / MPI process = ½ node memory  Hybrid MPI/OpenMP programming model SMP Mode  One core runs one MPI process  Process may spawn threads on each of the other cores  Memory / MPI process = full node memory  Hybrid MPI/OpenMP programming model M P M P M P Memory address space M Core 0 P Application Core 1Core 2Core 3 Application M P T M P T Core 0 Core 1 Core 2 Core 3 Memory address space CPU2CPU3 Application M P TTT Core 0 Core 1Core 2Core 3 Memory address space What’s new – Blue Gene/P Blue Gene/P job modes allow flexible use of node memory

3. 3 What’s new – Blue Gene/P HPC 1024 nodes HTC Q-Mode 512 nodes HTCHPC App1 App6 App7 App8 App9 HTC DM 256 nodes HTC SMP 256 nodes High-Throughput Computing (HTC) modes on Blue Gene/P BG/P with HTC looks like a cluster for serial and “pleasantly” parallel apps Hybrid environment … standard HPC (MPI) apps plus now HTC apps Enables a new class of workloads that use many single-node jobs Easy administration using web-based Navigator Whitepaper

4. 4 Why HTC?  Collaboration across several National Energy Research organizations created Materials Aging Institute (MAI) to help power companies optimize operations and lifetimes of existing nuclear plants and support the design of next generation plants  BG/P used to simulate, model and analyze equipment corrosion, component and materials degradation due to irradiation, and performance of nonmetallic materials  EDF uses BG/P…  In HPC mode for CFD and environment simulations with various apps such as Euler, Lagrangian SPH, Finite Element, VASP  In HTC mode for CATHARE (used in thermal hydrodynamic studies)  In HPC/HTC hybrid modes for risk analysis and process management  Although MAI’s primary focus is on nuclear materials, research results will also benefit fossil and hydropower facilities www.spscicomp.org/ScicomP13/Presentations/User/PascalVezolle-EDF.pdf

5. What’s new – Software