Modern FS Benchmark

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About

Modern FS Benchmark is ranked #15 of 29 in disk benchmark software on Inferse. It runs on Linux, Self-hosted.

Compared on disk benchmark software

Free plan: Yesgithub.com
Random I/O tests: Yesgithub.com
Sequential tests: Yesgithub.com
IOPS measurement: Yesgithub.com
Latency measurement: Yesgithub.com
Supported platforms: Linuxgithub.com
Command-line interface: Yesgithub.com

Facts

Purpose: Modern FS Benchmark continuously benchmarks multi-device copy-on-write filesystems, including btrfs, ZFS, and bcachefs, against ext4 and XFS baselines.github.com · 4 Oct 2026
Workloads: Its benchmark phases measure throughput, latency, snapshots, compression, reflinks, degraded operation and rebuild, corruption recovery, and near-full behavior.github.com · 4 Oct 2026
Results dashboard: Results are published in a dashboard with per-metric charts, aging curves, run trends, filters, and a sortable table.github.com · 4 Oct 2026
CI cadence: GitHub Actions runs benchmarks on every push and on a six-hour schedule using four loop devices backed by sparse files.github.com · 4 Oct 2026
CI limitation: Hosted CI devices share one virtual disk, so the project says absolute throughput is meaningless and RAID striping gains are fictional in those runs.github.com · 4 Oct 2026
Hardware runs: The scripts can run against real block devices, which are wiped when listed for a benchmark run; devices must be unmounted and existing filesystem signatures require BENCH_WIPE=1.github.com · 4 Oct 2026
Linux deployment: The repository provides a Nix flake with a reusable NixOS module and benchmark package for dedicated self-hosted GitHub Actions runners.github.com · 4 Oct 2026
Security scope: The corruption test overwrites a raw range on one device, scrubs, and checks one tracked file hash; it is not a whole-filesystem health check.github.com · 4 Oct 2026
Integrity coverage: The project describes checksum verification and reconstruction testing for btrfs, ZFS, and bcachefs when redundancy is configured.github.com · 4 Oct 2026
Methodology limits: The exact workload recipes and composite summary index are project-specific rather than an industry-standard benchmark.github.com · 4 Oct 2026
Licensing: Source code, configuration, workflows, and documentation use Apache License 2.0, while published benchmark datasets use CC BY 4.0.github.com · 4 Oct 2026
Support: The maintainer invites issues and pull requests for workload, configuration, methodology, and filesystem suggestions.github.com · 4 Oct 2026
Sponsor support: The maintainer says a suitable dedicated server costs approximately €70 per month and accepts financial support through GitHub Sponsors and Ko-fi.github.com · 4 Oct 2026
Maintainer: The repository copyright identifies Bartosz Fenski; it does not state a headquarters or founding date.github.com · 4 Oct 2026