IBM Flex System V7000 Storage Node 4939H49 Manuel D’Utilisation
Codes de produits
4939H49
Chapter 9. IBM Flex System V7000 Storage Node Copy Services
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Draft Document for Review January 29, 2013 12:52 pm
8068ch09-Copy Servies.fm
as Global Mirror with Change Volumes and should have Change Volumes defined for both
the source and target volumes when used.
the source and target volumes when used.
This capability provides options to help administrators balance network bandwidth
requirements and RPO times for applications, helping reduce operation costs for disaster
recovery solutions. Remote mirroring supports higher RPO times by allowing the data at
the disaster recovery site to get further out of sync with the production site if the
communication link limits replication, and then approaches synchronicity again when the
link is not as busy. This low bandwidth remote mirroring uses space-efficient FlashCopy
targets as sources in remote copy relationships to increase the time allowed to complete a
remote copy data cycle.
requirements and RPO times for applications, helping reduce operation costs for disaster
recovery solutions. Remote mirroring supports higher RPO times by allowing the data at
the disaster recovery site to get further out of sync with the production site if the
communication link limits replication, and then approaches synchronicity again when the
link is not as busy. This low bandwidth remote mirroring uses space-efficient FlashCopy
targets as sources in remote copy relationships to increase the time allowed to complete a
remote copy data cycle.
Licensing guidelines for Remote Copy
To authorize use of remote copy capabilities of the IBM Flex System V7000, you must
purchase a feature license for IBM Flex System V7000 Remote Mirroring Software. This
license is based on the quantity of enclosures that are authorized for the feature.
purchase a feature license for IBM Flex System V7000 Remote Mirroring Software. This
license is based on the quantity of enclosures that are authorized for the feature.
To determine the number of authorized enclosures needed you should count all enclosures
on the system that are managed by the IBM Flex System V7000 Disk System, including each
internal enclosure licensed with the IBM Flex System V7000 Base Software and each
external enclosure licensed with the IBM Flex System V7000 External Virtualization Software.
This should be done at both the ends of the mirroring relationship. The location with the least
number of members is the location that defines the number of licenses needed for each
location site.
on the system that are managed by the IBM Flex System V7000 Disk System, including each
internal enclosure licensed with the IBM Flex System V7000 Base Software and each
external enclosure licensed with the IBM Flex System V7000 External Virtualization Software.
This should be done at both the ends of the mirroring relationship. The location with the least
number of members is the location that defines the number of licenses needed for each
location site.
For example, if you have site A with a DS5020 consisting of three enclosures managed by an
IBM Flex System V7000 consisting of one control enclosure and one expansion enclosure
mirroring to a partner at site B with an IBM Flex System V7000 consisting of one control
enclosure and two expansion enclosures and no external virtual storage system attached,
then in order to authorize remote mirroring for this configuration you will need a license to the
IBM Flex System V7000 Remote Mirroring Software, for a quantity of six enclosures; three for
site A and three for site B. If however, in the future you were to grow your site B system to
include more enclosures or an external virtualized system you would then need to re-evaluate
the licensing to add the appropriate number for the new configuration of the site with the
fewest enclosures managed.
IBM Flex System V7000 consisting of one control enclosure and one expansion enclosure
mirroring to a partner at site B with an IBM Flex System V7000 consisting of one control
enclosure and two expansion enclosures and no external virtual storage system attached,
then in order to authorize remote mirroring for this configuration you will need a license to the
IBM Flex System V7000 Remote Mirroring Software, for a quantity of six enclosures; three for
site A and three for site B. If however, in the future you were to grow your site B system to
include more enclosures or an external virtualized system you would then need to re-evaluate
the licensing to add the appropriate number for the new configuration of the site with the
fewest enclosures managed.
Remote mirroring Flex System V7000 with an SVC in the mix, because of a difference in
metrics, SVC mirroring can be licensed for a subset of the total storage virtualized. However,
the IBM Flex System V7000 and the IBM Storwize V7000 still must used the above model for
their licensing.
metrics, SVC mirroring can be licensed for a subset of the total storage virtualized. However,
the IBM Flex System V7000 and the IBM Storwize V7000 still must used the above model for
their licensing.
Remote Copy configuration limits
Table 9-4 lists the Remote Copy configuration limits.
Table 9-4 Remote Copy configuration limits
Parameter
Value
Number of Remote Copy
consistency groups per cluster
consistency groups per cluster
256
Number of Remote Copy
relationships per consistency
group
relationships per consistency
group
8,192
Number of Remote Copy
relationships per I/O Group
relationships per I/O Group
2,048