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288 DS6000 Series: Concepts and Architecture
14.7 Enterprise Remote Copy Management Facility (eRCMF)
eRCMF is a multi-site disaster recovery solution, managing IBM Total Storage Remote Mirror
and Copy as well as FlashCopy functions, while ensuring data consistency across multiple
machines. It is a scalable, flexible solution for the DS6000 with the following functions:
When a site failure occurs or may be occurring, eRCMF splits the two sites in a manner
that allows the backup site to be used to restart the applications. This needs to be fast
enough that when the split occurs, operations on the production site are not impacted.
It manages the states of the Metro Mirror and FlashCopy relationships, so that the
customer knows when the data is consistent and can control on which site the applications
run.
It offers easy commands to place the data in the state it needs to be in. For example, if the
data is out of sync, the command
resync will cause eRCMF to scan the specified volumes
and issue commands to bring the volumes back into sync.
It offers a tool to execute eRCMF configuration checks. This check is intended to verify
that the eRCMF configuration matches the physical DS6000 setup in the customer
environment. This is required to discover configuration changes that affect the eRCMF
configuration as well. Regular checks support customers in keeping the eRCMF
configuration up-to-date with their actual environment; otherwise, full eRCMF
management functionality is not given.
eRCMF is a IBM Global Services offering. More information about eRCMF can be found at:
http://www-1.ibm.com/services/us/index.wss/so/its/a1000110
14.8 Summary
The new DS6000 enterprise disk subsystem offers broad support and superior functionality
for all major open system host platforms. In addition, IBM provides software packages for
many platforms that are needed to exploit all of the functionality. IBM also integrated DS6000
functionality into its family of storage management software products that help to reduce the
effort of managing complex storage infrastructures, to increase storage capacity utilization
and to improve administrative efficiency.