Relocation priority
If you use the relocation priority function, you can set the selection priority of a DP-VOL when performing relocation. With this setting, a prioritized DP-VOL can be relocated earlier during a relocation cycle. You can set this function by using Device Manager - Storage Navigator. The function is activated after the monitoring data is collected.
- If no relocation priority is set for all DP-VOLs, the general order of DP-VOL selection is to select the next DP-VOL in LDEV number order after the last DP-VOL that fully performed relocation. This selection order persists across relocation cycles.
- If one or more DP-VOLs is assigned a relocation priority, the prioritized DP-VOLs are operated upon in the early portion of the relocation cycle, before others in the general order of DP-VOL selection.
- If V-VOL is not given priority for relocation:
For example, if LDEVs of LDEV IDs with LDEV#1, LDEV#2, LDEV#3, LDEV#4, and LDEV#5 are not given priority for relocation, LDEVs are relocated with the following sequences. In this example, three LDEVs are relocated in each period, but the number of LDEVs to relocate may change by the relocation cycle or the data size.
Relocating cycle
Relocating sequence of LDEV#1 in each cycle
Relocating sequence of LDEV#2 in each cycle
Relocating sequence of LDEV#3 in each cycle
Relocating sequence of LDEV#4 in each cycle
Relocating sequence of LDEV#5 in each cycle
T1
1st
2nd
3rd
Unperformed
Unperformed
T2
3rd
Unperformed
Unperformed
1st
2nd
T3
Unperformed
1st
2nd
3rd
Unperformed
T4
2nd
3rd
Unperformed
Unperformed
1st
- If V-VOL is given priority for relocation:
For example, if LDEVs of LDEV IDs with LDEV#3 and LDEV#4 are set priority for relocation from LDEV#1 to LDEV#5, LDEVs are relocated with the following sequences. In this example, three LDEVs are relocated in each period, but the number of LDEVs to relocate may change by the relocation cycle or data size.
Relocating cycle
Relocating sequence of LDEV#1 in each cycle
Relocating sequence of LDEV#2 in each cycle
Relocating sequence of LDEV#3 in each cycle
Relocating sequence of LDEV#4 in each cycle
Relocating sequence of LDEV#5 in each cycle
T1
3rd
Unperformed
1st
2nd
Unperformed
T2
Unperformed
3rd
1st
2nd
Unperformed
T3
Unperformed
Unperformed
1st
2nd
3rd
T4
3rd
Unperformed
1st
2nd
Unperformed