Defines tiering policy for the volume.
| JSON representation | 
|---|
| {
  "tierAction": enum ( | 
| Fields | |
|---|---|
| tierAction | 
 Optional. Flag indicating if the volume has tiering policy enable/pause. Default is PAUSED. | 
| coolingThresholdDays | 
 Optional. Time in days to mark the volume's data block as cold and make it eligible for tiering, can be range from 2-183. Default is 31. | 
| hotTierBypassModeEnabled | 
 Optional. Flag indicating that the hot tier bypass mode is enabled. Default is false. This is only applicable to Flex service level. | 
TierAction
Tier action for the volume.
| Enums | |
|---|---|
| TIER_ACTION_UNSPECIFIED | Unspecified. | 
| ENABLED | When tiering is enabled, new cold data will be tiered. | 
| PAUSED | When paused, tiering won't be performed on new data. Existing data stays tiered until accessed. |