Parallel File Systems Explained: Metadata, Striping, And Throughput
Blocks & Files, Wednesday, November 26th, 2025
Parallel file systems can be confusing. They are needed in high-performance computing (HPC) to provide sufficiently high aggregate I/O bandwidth and low-latency access to shared data for thousands or tens of thousands of compute nodes (or millions of cores) working on the same problem simultaneously.
Such file systems optimize the compute hardware use and make the processing application run faster.
A parallel file system can deliver many files in parallel, or deliver many parts of one file, stripes, in parallel.
The well-established HPC parallel file systems ship many parts of individual files faster from storage to compute by pumping out stripes of files in parallel and getting these to HPC processors so they can work in parallel and complete jobs faster.
The two variants, the striping and non-striping, are quite different in their implementation.