The system includes IBM Easy Tier, which is a function that responds to the presence of drives in a storage pool that also contains hard disk drives (HDDs). The system automatically and nondisruptively moves frequently accessed data from HDD MDisks to flash storage MDisks, thus placing such data in a faster tier of storage. The system supports these tiers:Tier 0 flash Tier 0 flash tier exists when the pool contains high-cost, high performance flash drives. Tier 1 flash Tier 1 flash tier exists when the pool contains tier 1 flash drives. Tier 1 flash drives are lower-cost flash drives, typically with larger capacities, but slightly lower performance and write endurance characteristics. Enterprise tier Enterprise tier exists when the pool contains enterprise-class MDisks, which are disk drives that are optimized for performance. Nearline tier Nearline tier exists when the pool contains nearline-class MDisks, which are disk drives that are optimized for capacity. References: https://www.ibm.com/support/knowledgecenter/STVLF4_7.8.0/spectrum.virtualize.780.doc/svc_easy_tier.html
The system includes IBM Easy Tier, which is a function that responds to the presence of drives in a storage pool that also contains hard disk drives (HDDs). The system automatically and nondisruptively moves frequently accessed data from HDD MDisks to flash storage MDisks, thus placing such data in a faster tier of storage.
The system supports these tiers:
Tier 0 flash tier exists when the pool contains high-cost, high performance flash drives.
Tier 1 flash tier exists when the pool contains tier 1 flash drives. Tier 1 flash drives are lower-cost flash drives, typically with larger capacities, but slightly lower performance and write endurance characteristics.
Enterprise tier exists when the pool contains enterprise-class MDisks, which are disk drives that are optimized for performance.
Nearline tier exists when the pool contains nearline-class MDisks, which are disk drives that are optimized for capacity.
References: https://www.ibm.com/support/knowledgecenter/STVLF4_7.8.0/spectrum.virtualize.780.doc/svc_easy_tier.html