Even if the parity groups are concatenated, the total capacity of the interleaved parity group will not be of large capacity.Configuration of interleaved parity group
If RAID configurations are RAID1 (2D+2D) or RAID5 (7D+1P), the interleaved parity group can be created by concatenation of multiple parity groups. RAID configurations and the number that can be concatenated are as follows:
|
RAID configuration |
2 concatenating |
4 concatenating |
|---|---|---|
|
RAID1 (2D+2D) |
Available |
Not Available |
|
RAID5 (7D+1P) |
Available |
Available |
When concatenating parity groups, data in LDEVs that are FV or CV are dispersedly allocated between the interleaved parity groups Therefore, loads are dispersed because of the parity group concatenation, so that the performance of LDEV is improved.
The capacity of the created LDEV are managed by each of the parity groups that are in the interleaved parity group. The maximum capacity of an LDEV is same as the capacity of the interleaved parity group.
Even if the parity groups are concatenated, the total capacity of the interleaved parity group will not be of large capacity.
See the examples below:
Creating the interleaved parity group by concatenating of parity groups of PG1-1 and PG1-2.
Creating LDEVs in each parity group that are in the interleaved parity group.
LDEV 1 in PG1-1
LDEV 2 in PG1-2
