IBM System storage DS6000 Series, Redbook

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Chapter 32. GDPS overview
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the Freeze function for GDPS/PPRC, FlashCopy automation, or the unplanned outage
functions available through the other versions of GDPS.
RCMF/PPRC is positioned as a remote copy management control tool, designed to make the
task for operators to stop and start remote copy sessions much easier.
The highlights of RCMF/PPRC include:
򐂰 Central point of control - full screen
򐂰 Global PPRC configuration awareness
򐂰 Functional, tree-structured interface
򐂰 TSO commands not needed
򐂰 Initialize and maintain Remote Copy configuration
򐂰 Single keystroke function invocation
򐂰 Initiate functions per pair, subsystem, or all
򐂰 Automatically establish target configuration at system startup
򐂰 Supports adding, moving, removing pairs, subsystems and links
򐂰 RCMF does not manage unplanned outage secondary data consistency
򐂰 Drive Peer-to-Peer/Dynamic Address Switching (P/DAS)
򐂰 User-initiated status and exception reporting
򐂰 Can run as a NetView application - System Automation not required
32.1.4 GDPS/XRC overview
IBM System Storage z/OS Global Mirror, formerly known as Extended Remote Copy (XRC),
is a combined hardware and z/OS software asynchronous remote copy solution for System z
data. z/OS Global Mirror is designed to provide premium levels of scalability, reaching into
the tens of thousands of System z volumes. Consistency of the data is maintained via the
Consistency Group function within the System Data Mover.
GDPS/XRC includes automation to manage z/OS Global Mirror remote copy pairs and
automates the process of recovering the production environment with limited manual
intervention, including invocation of CBU, thus providing significant value in reducing the
duration of the recovery window and requiring less operator interaction.
GDPS/XRC provides the following attributes:
򐂰 Disaster recovery solution
򐂰 RTO between an hour to two hours
򐂰 RPO less than two minutes, typically 3-5 seconds
򐂰 Protects against localized as well as regional disasters; unlimited distance between sites
򐂰 Minimal remote copy performance impact
32.1.5 RCMF/XRC overview
Remote Copy Management Facility/XRC (RCMF/XRC) is a subset of GDPS/XRC that
provides the capability to manage the z/OS Global Mirror configuration for planned and
unplanned outages. RCMF/XRC is not intended to manage the system and workload
environment. RCMF/XRC provides a central point of control of z/OS Global Mirror disk
mirroring configurations where the environment does not require more than one SDM.
Environments that require multiple SDMs and/or coupled SDMs will require the full
GDPS/XRC.
RCMF/XRC solution highlights include:
򐂰 Functional full screen interface
򐂰 Initialize and maintain z/OS Global Mirror Remote Copy configuration