Prof. Dr. Frank Bellosa
Peter Maucher

Persistent non-volatile memory (PMem) gained more and more attention over the years. When compared to SSDs, it shines with lower latency and higher read throughput. However, its write bandwidth is a major drawback. As PMem is connected via the memory bus, the OS does not detect an IO-bound task; which lets CPU cores stall more likely. Shifting PMem interaction to an accelerator is one way to resolve this problem. GPU4FS is a graphics card accelerated file system. However, it does not provide any advanced features. In this thesis, we extend GPU4FS with checksum and deduplication functionality. While checksums protect a file system’s content against corruption, deduplication can save storage by detecting duplicate data blocks. Both functionalities are suitable for a GPU, as their implementation is parallelizable. Our results show that GPU acceleration of
those features becomes more feasible the more load the file system faces. Thus, a hybrid mode with mixed CPU/GPU utilization seems like a promising concept.

BibTex:

@bachelorthesis{rath23extendingGPU4FS,
  author = {Nico Rath},
  title = {Extending GPU4FS with Advanced File System Functionalities},
  type = {Bachelor Thesis},
  year = 2023,
  month = aug # "29",
  school = {Operating Systems Group, Karlsruhe Institute of Technology (KIT), Germany}
  }