Set a hard bucket quota on MinIO with mc quota set
domain: min.io · 4 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Set a hard capacity quota on a bucket: mc quota set ALIAS/BUCKET --size SIZE where SIZE needs a unit suffix, e.g. mc quota set myaistor/mybucket --size 1GB (also 500MB, 10GB, etc).
Requires admin permission admin:SetBucketQuota (included in the built-in consoleAdmin policy).
Once total bucket size reaches the limit, further PUT operations are rejected - it enforces a hard ceiling.
Check the current limit: mc quota info ALIAS/BUCKET ; remove it: mc quota clear ALIAS/BUCKET.
Known gotchas
--size is required and needs a unit suffix (1GB, 500MB...) - it is not accepted without one.
Enforcement is BEST-EFFORT, not real-time: quota usage is evaluated by an internal scanner on a cycle, so a bucket may temporarily exceed the limit between scans.
Internal/MinIO-internal processes (e.g. Inventory) bypass quota enforcement; do not rely on quotas as a hard safety ceiling.
quota info needs a DIFFERENT permission (admin:GetBucketQuota) than set/clear (admin:SetBucketQuota) - a user may be able to set but not read a quota.
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