Quota cache

Quota statistics are cached for each Ceph Gateway instance. If there are multiple instances, then the cache can keep quotas from being perfectly enforced, as each instance will have a different view of the quotas.

The options that control how the cache keeps the quotas are rgw bucket quota ttl, rgw user quota bucket sync interval, and rgw user quota sync interval. The higher these values are, the more efficient quota operations are, but the more out-of-sync multiple instances will be. The lower these values are, the closer to perfect enforcement multiple instances will achieve. If all three are 0, then quota caching is effectively disabled, and multiple instances will have perfect quota enforcement.

For more details on these options, see Configuration reference.