Resource Groups For Copy Services Scope Limiting - IBM DS8800 Introduction And Planning Manual

target volume for backup or recovery purposes. (Automation software is
not provided with the storage unit; it must be supplied by the user.)
Note: Freezing of the data is done at the same point-in-time across all
Automatically (with Global Mirror and FlashCopy)
If you use a two-site Global Mirror or a three-site Metro/Global Mirror
configuration, the process to create a consistent and restartable copy at
your intermediate or remote site is done using an automated process, with
minimal or no interruption to your applications. Global Mirror operations
automate the process of continually forming consistency groups. It
combines Global Copy and FlashCopy operations to provide consistent
data at the remote site. A master storage unit (along with subordinate
storage units) internally manages data consistency using consistency
groups within a Global Mirror configuration. Consistency groups can be
created many times per hour to increase the currency of data that is
captured in the consistency groups at the remote site.
Note: A consistency group is a collection of volumes (grouped in a
In a two-site Global Mirror configuration, if you have a disaster at your
local site and have to start production at your remote site, you can use the
consistent point-in-time data from the consistency group at your remote
site to recover when the local site is operational.
In a three-site Metro/Global Mirror configuration, if you have a disaster at
your local site and you must start production at either your intermediate
or remote site, you can use the consistent point-in-time data from the
consistency group at your remote site to recover when the local site is
operational.

Resource groups for Copy Services scope limiting

Resource groups are used to define a collection of resources and associate a set of
policies relative to how the resources are configured and managed. You can define
a network user account so that it has authority to manage a specific set of
resources groups.
Copy Services scope limiting overview
Copy services scope limiting is the ability to specify policy-based limitations on
Copy Services requests. With the combination of policy-based limitations and other
inherent volume-addressing limitations, you can control which volumes can be in a
Copy Services relationship, which network users or host LPARs issue Copy
Services requests on which resources, and other Copy Services operations.
Use these capabilities to separate and protect volumes in a Copy Services
relationship from each other. This can assist you with multi-tenancy support by
assigning specific resources to specific tenants, limiting Copy Services relationships
so that they exist only between resources within each tenant's scope of resources,
and limiting a tenant's Copy Services operators to an "operator only" role.
links and all storage units.
session) across multiple storage units that are managed together in a
session during the creation of consistent copies of data. The
formation of these consistency groups is coordinated by the master
storage unit, which sends commands over remote mirror and copy
links to its subordinate storage units.
Chapter 3. Data management features
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