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- W4387446180 abstract "HPC systems encompass more components with each new generation. As a result, the process of interacting with stable storage systems like parallel file systems (PFS) becomes increasingly difficult. Larger systems often result in more frequent failures, increasing the need and frequency to incorporate fault-tolerant mechanisms. One example is checkpoint-restart (C/R), where applications or systems save their data to non-volatile storage devices, such as a PFS. On failure, the system or application is restored to a saved state and computation continues. Today, asynchronous C/R is gaining traction for its ability to checkpoint data to permanent storage concurrently with the application. However, asynchronous C/R brings about many new challenges. For starters, asynchronous C/R introduces complex resource contention between the application and the C/R implementation. Additionally, some implementations adopt file-per-process writing strategies, which overwhelm PFS’ at high core counts. In this work, we explore how multi-threaded POSIX I/O impacts aggregated throughput. To this extent we characterize the influence of different I/O parameters, such as the number of writer threads and how they access storage devices, has on aggregated I/O. We use the information gathered in this study to identify best practices when performing aggregated I/O as a first step in designing an efficient I/O aggregation scheme for asynchronous C/R." @default.
- W4387446180 created "2023-10-10" @default.
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- W4387446180 date "2023-07-01" @default.
- W4387446180 modified "2023-10-11" @default.
- W4387446180 title "Modeling Multi-Threaded Aggregated I/O for Asynchronous Checkpointing on HPC Systems" @default.
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- W4387446180 doi "https://doi.org/10.1109/ispdc59212.2023.00021" @default.
- W4387446180 hasPublicationYear "2023" @default.
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