Use the
chrcconsistgrp command to modify attributes of an existing Metro Mirror,
Global Mirror, or active-active consistency group, such as changing the name of
a consistency group.
Syntax
chrcconsistgrp [ { [ -namenew_name_arg ] | [ -cycleperiodsecondsperiod ] | [ -cyclingmode { none | multi } ] } ] [ { -global | -metro } ] { rc_consist_group_name | rc_consist_group_id }
Parameters
- -namenew_name_arg
- (Optional) Specifies the new name to assign to the consistency group.
- -cycleperiodsecondsperiod
- (Optional) Specifies the cycle period in seconds. The minimum cycle period value is 60
seconds (1 minute) and the maximum is 86400 seconds (1 day). The default is 300 seconds (5
minutes).
- This parameter defines an optional cycle period that applies to Global Mirror relationships
with a cycling mode of multi. A Global Mirror relationship that uses the
multicycling_mode performs a complete cycle each period. It might be provided for
any relationship, but cannot be used for none in Metro or Global Mirror
relationships.
- -cyclingmodenone | multi
- (Optional) Specifies the behavior of Global Mirror for this relationship.
- Specifying none, the default, gives identical behavior to Global
Mirror in previous versions of Lenovo Storage V series.
- Specifying multi uses the cycling protocol.
To start a relationship with cycling_mode set to multi, change volumes
must be defined for the relationship. Note: The cycling_mode can be changed
only when the relationship is stopped and in consistent_stopped or
inconsistent_stopped states.
- -metro
- (Optional) Specifies the change in the consistency group's copy type and converts a Global
Mirror (with or without change volumes) relationship to a Metro Mirror relationship.
Remember: To use this parameter, the consistency group must be stopped
(inconsistent_stopped, consistent_stopped, or
idling).
- -global
- (Optional) Specifies the change in the consistency group's copy type and converts a Metro
Mirror relationship to a Global Mirror relationship. This parameter is not mutually exclusive
with -cyclingmode. If you do not specify
-cyclingmode and the relationship is Metro Mirror, the
cycling_mode value is none.
Remember: To
use this parameter, the consistency group must be stopped
(inconsistent_stopped, consistent_stopped, or
idling).
- rc_consist_group_name | rc_consist_group_id
- (Required) Specifies the ID or existing name of the consistency group that you want to
modify.
Description
This command modifies the
specified attributes of the supplied consistency group, one attribute at a time.
All
parameters are mutually exclusive except for the -cyclingmode, which is
mutually exclusive with all parameters but -global.
Note: One of the optional parameters must be specified.
You can change a relationship or consistency group between copy types even
if replication is stopped. Consistency protection is preserved across all types, so a
relationship or consistency group that is in consistent_copying state before it
is stopped retains the consistent copy on the secondary system when the copying type is changed.
Note: You cannot set cycling mode to
multi-cycling mode if there is a relationship where the primary and secondary
volumes are different sizes.
A Global Mirror consistency group with cycling mode set
to multi requires that change volumes are defined for the primary and
secondary volumes of each relationship in the group before it can be started.
For intersystem relationships, the -cycleperiodseconds and
-cyclingmode parameters can be specified only when the two systems are
connected. If the two systems become disconnected while the command is being processed, the
command might complete with the change that is performed on the system that received the task
invocation only. The other system is updated upon reconnection.
For consistency groups that are
active-active, you cannot change the copy type or cycling mode. It means you
cannot specify these parameters:
- -global
- -metro
- -cyclingmode
An invocation example to change a consistency group name from
rc_testgrp to
rctestone.
chrcconsistgrp -name rctestone rc_testgrp
The
resulting output:
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