Docker overlayfs Storage Backend
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Internal
Overview
overlay and overlay2l operate at the file level rather than the block level. Because of this, but the container’s writable layer may grow quite large in write-heavy workloads.
Info
At runtime, general statistics on the overlayfs storage driver can be obtained with:
docker info [...] Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: true [...] Docker Root Dir: /var/lib/docker [...]