Geographic Edition Properties for Hitachi TrueCopy and Universal Replicator
This appendix provides the properties of Geographic Edition data replication components.
Note -
The property values, such as True and False, are
not case sensitive.
Hitachi TrueCopy and Universal Replicator Properties
The following table describes the Hitachi TrueCopy and Universal Replicator properties that the Geographic Edition framework
defines.
Table 13 Hitachi TrueCopy and Universal Replicator Properties
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Data Replication Property: Cluster_dgs (string array)
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Lists the Oracle Solaris Cluster device groups where the data is written. The list is comma
delimited. Only applications that belong to the protection group should write to these device
groups. The Oracle Solaris Cluster device groups listed in the Cluster_dgs
protection group property must exist and have the same name on both the primary cluster and the
secondary cluster. The LUNs in this device group must correspond to LUNs getting replicated in the
Hitachi data replication component added to the protection group. Specify this property if you want
geographic edition to unmount file systems that use this Oracle Solaris Cluster device group.
Tuning recommendations: This property can only be tuned when the protection group is
offline.
Category: Optional
Default: Empty
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Data Replication Property: Nodelist (string array)
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Lists the host names of the machines that can be primary for the replication mechanism. This
list is comma delimited.
Tuning recommendations: This property can be tuned at any time.
Category: Optional
Default: All nodes in the cluster
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Data Replication Property: Fence_level (enum)
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Defines the fence level that is used by the data replication component. The fence level
determines the level of consistency among the primary and secondary volumes for that data
replication component. Possible values are Never and Async. To
use the data or status fence levels, contact your Oracle
representative.
Note -
If you specify a Fence_level of never, the data
replication roles do not change after you perform a takeover.
Tuning recommendations: This property can only be tuned when the protection group is
offline.
Category: Required
Default: None
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Data Replication Property: Ctgid (integer)
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Specifies the consistency group ID (CTGID) of the protection group. Once the CTGID of a
protection group has been set, all Hitachi TrueCopy or Universal Replicator data replication components thereafter added to the
protection group either must be uninitialized or must already have the same CTGID as the protection
group.
Attempting to add an initialized data replication component to a protection group results in
an error if the CTGID of the data replication component differs from the CTGID of the protection
group. A data replication component with the same CTGID as a protection group must be added to that
protection group.
Tuning recommendations: This property can only be tuned at creation.
Category: Optional
Default: None
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