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Tech riderRev. 20 Sept 2026

Modern FS Benchmark

Ch 136.5of 29 Disk Benchmark Software
  1. 1Runs onLinux, self-hosted
  2. 2CostsNot stated by the maker
  3. 3Random I/O testsYes
  4. 4Sequential testsYes
  5. 5IOPS measurementYes
  6. 6Latency measurementYes
  7. 7Supported platformsLinux
  8. 8Command-line interfaceYes
7 lines stated Written from the maker's own pages: github.com
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Overview

Modern FS Benchmark is ranked #13 of 29 in disk benchmark software on Specifiction. 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
Benchmark coverage
Its measurements include redundancy layouts, snapshots, compression, encryption, reflinks, fsync latency, degraded operation, rebuilds, corruption recovery, and near-full behavior.github.com · 4 Oct 2026
Integrations
The project runs benchmarks in GitHub Actions and provides a reusable NixOS module and benchmark package for self-hosted runners.github.com · 4 Oct 2026
Local use
The README documents running the benchmark locally on Linux with loop devices or on real block devices.github.com · 4 Oct 2026
Security and data integrity
The corruption phase overwrites a raw range on one device, runs a scrub, and compares a tracked test-file hash; the README cautions that this is not a whole-filesystem health check.github.com · 4 Oct 2026
Destructive operation
Real-device runs require unmounted devices, refuse devices with filesystem signatures unless BENCH_WIPE=1 is set, and wipe listed devices.github.com · 4 Oct 2026
Methodology limitation
The README says its workload recipes and composite summary index are project-specific rather than an industry-standard benchmark.github.com · 4 Oct 2026
Project licenses
The source code, configuration, workflows, and documentation use Apache License 2.0; published benchmark datasets use CC BY 4.0.github.com · 4 Oct 2026
Hardware support
The maintainer says a suitable dedicated server currently costs approximately €70 per month, depending on availability and disk configuration, and invites hardware support or sponsorship.github.com · 4 Oct 2026

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