Filesystem metrics

This group lists mounts that are not /. Root capacity is in Storage. Each card is titled from the mountpoint and any roles (for example /var/lib/turbopanel (hosting)).

A host with only / has no Filesystems group. Extra mounts appear when the daemon enumerates them and the capability plan allows extra filesystem slots.

Available

filesystem.availableBytes — space that new files can use on that mount.

Same idea as root available, scoped to one mount. Hosting data, database volumes, and backup disks often live here rather than on /. A falling line is the volume filling; a sudden drop is usually a large write or a snapshot.

The overview Hosting storage used tile prefers a filesystem tagged with the hosting role. If that mount is not root, the tile is derived from this series plus the inventory total.

Free inodes

filesystem.freeInodes — remaining file slots on that mount.

A volume of small files (caches, mail, container layers) can hit zero inodes with space still free. “No space left on device” then means inodes. See root inodes for the same pattern on /.

Related

• Storage — host I/O and root filesystem
• Block devices — the disks underneath the mounts
• Filesystem events — remounted read-only, disappeared, remounted