dperf

What dperf is

dperf is a Linux command-line utility for benchmarking drives and spotting storage bottlenecks or performance outliers. It measures multiple drives at once and ranks them by throughput. Measurements use O_DIRECT to bypass the operating system page cache, and users can set block size, file size, and concurrent I/O operations per drive. Results show read and write throughput; verbose output adds per-drive statistics alongside aggregate totals. It supports sequential tests, but not random I/O tests, IOPS measurement, or latency measurement. The README describes deployment as Kubernetes Jobs, CronJobs, or DaemonSets for storage validation, as well as automated checks in CI/CD pipelines. Temporary disk space must equal the configured file size multiplied by the I/O operations per drive, for each drive. dperf requires Linux, a kernel and filesystem that support direct I/O, and write access to target directories. Prebuilt binaries are listed for amd64, arm64, ppc64le, and s390x. It is free under the GNU Affero General Public License v3.0. Support is directed to GitHub Issues, with MinIO Sales listed for enterprise support.