Automated Storage Tiering and the performance and cost optimization associated with it are supported by SHC-OSD for /390 servers and for x86 servers.
Information on flex volumes
The /SHOW-STORAGE-DEVICE-CONFIG RAID-LEVEL=*FDEV command selects flex volumes. These are labeled with F in the RAID display column.
The /SHOW-STORAGE-DEVICE-CONFIG INFORMATION=*FLEX-DEVICES command displays the specific properties of a flex volume with the assignment to a flex pool and the specific capacity values.
See the examples on "SHOW-STORAGE-DEVICE-CONFIG Displays the device configuration".
Information on flex pools
The /SHOW-STORAGE-CONFIGURATION INFORMATION=*FLEX-POOLS command supplies information on the configuration of the flex pools. The assignment of the RAID groups to the flex pools is also apparent from the information. The implementation for flex pools builds directly on RAID groups.
See the example on "SHOW-STORAGE-CONFIGURATION Displays the configuration".
Monitoring the flex pools
SHC-OSD monitors the occupancy level of the flex pools using the threshold values ATTENTION and WARNING which were set in the storage system. Monitoring by SHC-OSD can be set, see the FLEX-POOL-MONITORING parameter in the SHC-OSD parameter file in the section “Configuration of SHC-OSD”.
Messages NDE0087 (ATTENTION) and NDE0088 (WARNING) (which you can answer) on the console show when a particular threshold value for the occupancy level of a flex pool has been exceeded.
When the limit value is reached, administrative intervention enables further capacity to be provided in the flex pool. When the threshold values set are fallen below again in the flex pool, this is shown by the message NDE0083 on the console. Messages NDE0087/NDE0088 are then answered automatically if they are still open.