Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

Set Remote Replication Group

Description

Use this command to change the synchronization settings and warning thresholds that the RAID controller module owner of the primary side of the remote replication group uses when it performs an initial synchronization or resynchronization. Changing the synchronization settings affects the synchronization operations of all replicated pairs within the remote replication group.

Syntax

set asyncRemoteReplicationGroup [asyncRemoteReplicationGroupName] [virtualDisk="repos_xxxx" increaseRepositoryCapacity (repositoryVirtualDisk=("repos_xxxx")]
                                 [syncInterval=integer (minutes | hours | days)] [warningSyncThreshold=integer (minutes | hours | days)] [warningRecoveryThreshold=integer
                                 (minutes | hours | days)] [userLabel="New_asyncReplicationGroupName"] [warningThresholdPercent=percentValue] [role=(primary
                                 | secondary)] [autoResync=(TRUE | FALSE)]

Parameters

Parameter	Description
`asyncRemoteReplicationGroup`	The name of the remote replication group that you want to modify. Enclose the virtual disk name in square brackets ([ ]). If the virtual disk name has special characters, you also must enclose the virtual disk name in double quotation marks (" ") inside square brackets. If the virtual disk name consists only of numbers, such as "1002," you also must enclose the virtual disk name in double quotation marks (" ") inside square brackets.
`syncInterval`	Specify the length of time between automatically sending updates of modified data from the local storage array to the remote storage array. You can specify the length of time in minutes, hours, or days.
`warningSyncThreshold`	Specify the length of time to wait until a warning is triggered for cases in which the synchronization of all of the virtual disks within the remote replication group takes longer than the defined time. You can specify the length of time in minutes, hours, or days.
`warningRecoveryThreshold`	Specify the length of time to wait until a warning is triggered when the automatic data update for the point-in-time image on the remote storage array is older than the defined time. Define the threshold from the end of the previous update. You can specify the length of time in minutes, hours, or days. NOTE: You must set the Recovery Point Threshold to be twice as large as the synchronization interval threshold.
`warningThresholdPercent`	Specify the percent value that determines when a warning is triggered when the capacity of a replication repository virtual disk reaches the defined percentage. Define the threshold by percentage (%) of the capacity remaining.
`userLabel`	The new name that you want to give to the remote replication group. Use this parameter when you want to rename the remote replication group. Enclose the new remote replication group name in double quotation marks (" ").
`autoResync`	The settings for automatic resynchronization between the primary virtual disks and the secondary virtual disks of a remote replicated pair within a remote replication group. This parameter has these values: `enabled`—Automatic resynchronization is turned on. You do not need to do anything further to resynchronize the primary virtual disk and the secondary virtual disk. `disabled`—Automatic resynchronization is turned off. To resynchronize the primary virtual disk and the secondary virtual disk, you must run the `resume remoteReplicationGroup` command.
`virtualDisk`	The name of the specific virtual disk that you want to modify in the remote replication group. Enclose the virtual disk name in double quotation marks (" ").
`repositoryVirtualDisk`	The name of the repository virtual disk for which you want to increase capacity. An available standard virtual disk is added to the repository virtual disk to increase the capacity of the repository virtual disk. You have two options for defining the name of a repository virtual disk: Use an existing repository virtual disk name. Create a new repository virtual disk when you run this command. The name of an existing repository virtual disk is comprised of two parts: The term `repos` A four digit numerical identifier that you assign to the repository virtual disk name. Enclose the name of the existing repository virtual disk in double quotation marks (" "). If you want to create a new repository virtual disk when you run this command you must enter the name of either a a disk group or a disk pool in which you want the repository virtual disk. Optionally, you also can define the capacity of the repository virtual disk. If you want to define the capacity you can use these values: An integer value that represents a percentage of the base virtual disk capacity. A decimal fraction value that represents a percentage of the base virtual disk capacity. A specific size for the repository virtual disk. Size is defined in units of `bytes`, `KB`, `MB`, `GB`, or `TB`. If you do not use the capacity option, the MD storage management software sets the capacity to 20 percent of the base virtual disk capacity. Enclose the name of the new repository virtual disk in parenthesis ( ).
`role`	Use this parameter to promote the remote replication group to a primary role or demote the remote replication group to a secondary role. To define the remote replication group as the primary role, set this parameter to `primary`. To define the remote replication group as the secondary role, set this parameter to `secondary`.
`force`	The role reversal is forced if the communications link between the storage arrays is down and promotion or demotion on the local side results in a dual-primary condition or a dual-secondary condition. To force a role reversal, set this parameter to `TRUE`. The default value is `FALSE`. NOTE: Use the force parameter only when using the role parameter.
`nosync`	This parameter defines whether to perform an initial synchronization between the primary remote replication group and the secondary remote replication group before a role reversal operation is performed. To perform an initial synchronization, set this parameter to `TRUE`. The default value is `FALSE`.

Notes

You can use any combination of alphanumeric characters, underscore (_), hyphen (-), and pound (#) for the names. Names can have a maximum of 30 characters.

When you use this command, you can specify one or more of the parameters. You do not, however, need to use all of the parameters.

A remote replication group repository virtual disk is an expandable virtual disk that is structured as a concatenated collection of up to 16 standard virtual disk entities. Initially, an expandable repository virtual disk has only a single element. The capacity of the expandable repository virtual disk is exactly that of the single element. You can increase the capacity of an expandable repository virtual disk by attaching additional standard virtual disks to it. The composite expandable repository virtual disk capacity then becomes the sum of the capacities of all of the concatenated standard virtual disks.

A remote replication group repository virtual disk must satisfy a minimum capacity requirement that is the sum of the following:

32 MB to support fixed overhead for the remote replication group and for copy-on-write processing.
Capacity for rollback processing, which is 1/5000th of the capacity of the base virtual disk.

The minimum capacity is enforced by the RAID controller module firmware and the MD storage management software.

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