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. |