You can enable access time tracking to support features that require it.
By default, the EMC Isilon cluster does not track the timestamp when files are accessed. You can enable this feature to support OneFS features that use it. For example, access-time tracking must be enabled to configure SyncIQ policy criteria that match files based on when they were last accessed.
For example, if you configure a Precision setting of 1 day, the cluster updates the last-accessed time once each day, even if some files were accessed more often than once during the day.