The attributes of Thin Image consistency groups, such as the pair limit and pair type, have usage requirements. Review these requirements before creating consistency groups.
Item |
Requirement |
---|---|
Consistency group ID |
Value: 0 to 2,047 With SI, SIz, HTI, and HTI Advanced, you can create up to 2,048 consistency groups in VSP 5000 series storage. Manual assignment of a consistency group ID to an HTI pair using the paircreate command:
Automatic assignment of a consistency group ID to an HTI pair using the paircreate or raidcom add snapshot commands:
Consistency group ID is displayed in the following windows in HDvM - SN:
|
Pair limit |
8,192 pairs per consistency group. |
Pair type |
SI, SIz, Thin Image, and Thin Image Advanced pairs cannot be contained in a single consistency group. For Thin Image consistency groups, only Thin Image pairs can be defined in a group. Snapshot and cloned pairs cannot be contained in a single consistency group. |
Notes:
|
Consistency group restrictions:
- Thin Image pairs that share P-VOLs or are in higher and lower layers of a snapshot tree cannot be defined in the same consistency group. If they are defined in the same consistency group, the raidcom add snapshot command is rejected.
- Do not place pairs that are not in consistency groups, in a group defined by the CCI configuration definition file. If these pairs are in the same group, the pairsplit command may terminate and the snapshot data may not be the P-VOL data generated when a storage system received the pairsplit command.
- Only one consistency group can be specified for a group defined in the CCI configuration definition file.
- When a pair for which a consistency group is specified and is already created, if you specify another consistency group to create a pair, the pair is added to the same consistency group.
- To specify multiple consistency groups, use the CCI configuration definition file to define the same number of groups as the consistency groups you want to specify.