Available service tiers.
| Enums | |
|---|---|
| TIER_UNSPECIFIED | Not set. | 
| STANDARD | STANDARD tier. BASIC_HDD is the preferred term for this tier. | 
| PREMIUM | PREMIUM tier. BASIC_SSD is the preferred term for this tier. | 
| BASIC_HDD | BASIC instances offer a maximum capacity of 63.9 TB. BASIC_HDD is an alias for STANDARD Tier, offering economical performance backed by HDD. | 
| BASIC_SSD | BASIC instances offer a maximum capacity of 63.9 TB. BASIC_SSD is an alias for PREMIUM Tier, and offers improved performance backed by SSD. | 
| HIGH_SCALE_SSD | HIGH_SCALE instances offer expanded capacity and performance scaling capabilities. | 
| ENTERPRISE | ENTERPRISE instances offer the features and availability needed for mission-critical workloads. | 
| ZONAL | ZONAL instances offer expanded capacity and performance scaling capabilities. | 
| REGIONAL | REGIONAL instances offer the features and availability needed for mission-critical workloads. |