Realizing Joint Extreme-Scale Simulations on Multiple Supercomputers-Two Superfacility Case Studies
High-dimensional grid-based simulations serve as both a tool and a challenge in researching various domains. The main challenge of these approaches is the well-known curse of dimensionality, amplified by the need for fine resolutions in high-fidelity applications. The combination technique (CT) prov...
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| Veröffentlicht in: | SC24: International Conference for High Performance Computing, Networking, Storage and Analysis S. 1 - 17 |
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17.11.2024
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| Abstract | High-dimensional grid-based simulations serve as both a tool and a challenge in researching various domains. The main challenge of these approaches is the well-known curse of dimensionality, amplified by the need for fine resolutions in high-fidelity applications. The combination technique (CT) provides a straightforward way of performing such simulations while alleviating the curse of dimensionality. Recent work demonstrated the potential of the CT to join multiple systems simultaneously to perform a single high-dimensional simulation. This paper shows how to extend this to three or more systems and addresses some remaining challenges: load balancing on heterogeneous hardware; utilizing compression to maximize the communication bandwidth; efficient I/O management through hardware mapping; and improving memory utilization through algorithmic optimizations. Combining these contributions, we demonstrate the feasibility of the CT for extreme-scale Superfacility scenarios of 46 trillion DOF on two systems and 35 trillion DOF on three systems. Scenarios at these resolutions would be intractable with full-grid solvers (\gt1,000 nonillion DOF each). |
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| AbstractList | High-dimensional grid-based simulations serve as both a tool and a challenge in researching various domains. The main challenge of these approaches is the well-known curse of dimensionality, amplified by the need for fine resolutions in high-fidelity applications. The combination technique (CT) provides a straightforward way of performing such simulations while alleviating the curse of dimensionality. Recent work demonstrated the potential of the CT to join multiple systems simultaneously to perform a single high-dimensional simulation. This paper shows how to extend this to three or more systems and addresses some remaining challenges: load balancing on heterogeneous hardware; utilizing compression to maximize the communication bandwidth; efficient I/O management through hardware mapping; and improving memory utilization through algorithmic optimizations. Combining these contributions, we demonstrate the feasibility of the CT for extreme-scale Superfacility scenarios of 46 trillion DOF on two systems and 35 trillion DOF on three systems. Scenarios at these resolutions would be intractable with full-grid solvers (\gt1,000 nonillion DOF each). |
| Author | Offenhauser, Philipp Pollinger, Theresa Pfluger, Dirk Craen, Alexander Van |
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| Snippet | High-dimensional grid-based simulations serve as both a tool and a challenge in researching various domains. The main challenge of these approaches is the... |
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| SubjectTerms | Analytical models Bandwidth combination technique Computational modeling coupling HPC systems Couplings file transfer Hardware High performance computing higher-dimensional simulation large scale Load management Load modeling Memory management multi-level methods Optimization plasma turbulence |
| Title | Realizing Joint Extreme-Scale Simulations on Multiple Supercomputers-Two Superfacility Case Studies |
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