Thin Image Consistency Group Requirements - Hitachi VSP G1000 User Manual

Data pool warning threshold

Thin Image consistency group requirements

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.
Consistency group ID
Pair limit
Pair type
74
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
Item
For more information about deleting pools, see
on page
Value: Warning Threshold
Range: 20 - 95%, in 1% increments.
Default: 80%
Note: If you exceed the data pool warning threshold, a warning
is issued through a service information message (SIM) and an
SNMP trap reporting excessive pool usage.
For more information:
• About editing the data pool warning threshold, see
the data pool warning threshold on page
• About checking alerts and checking the details of a SIM, see
the System Administrator Guide for your storage system.
• About SNMP traps, see the Hitachi SNMP Agent User Guide.
Item
Value: 0 to 2,047
With SI, SIz, and HTI, you can create up to 2,048 consistency
groups in a VSP G1000, G1500, and VSP F1500 storage system.
Manual assignment of a consistency group ID to an HTI pair
using the paircreate command:
• Specify a consistency group ID from 0 to 255.
Automatic assignment of a consistency group ID to an HTI pair
using the paircreate or raidcom add snapshot commands:
• Using the paircreate command, if a number is not specified,
an unassigned number from 0 to 255 is automatically
assigned.
• Using the raidcom add snapshot command, if a number is
not specified, an unassigned number from 0 to 2,047 is
automatically assigned.
Consistency group ID is displayed in the following windows:
• Consistency Groups tab in Local Replication window.
• Consistency Group Properties window.
8,192 pairs per consistency group.
SI, SIz, and Thin Image 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.
Thin Image system and planning requirements
Requirement
187.
Requirement
1
2
Deleting pools
Editing
181.