Hitachi TrueCopy and Universal Replicator Properties
The following table describes the Hitachi TrueCopy and Universal Replicator properties that the
Geographic Edition software defines.
Table A-1 Hitachi TrueCopy and Universal Replicator Properties
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Data Replication Property: Cluster_dgs (string array) |
Lists the 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. Tuning
recommendations: This property can only be tuned when the protection group is offline. Category:
Optional Default: Empty |
Data Replication Property: Nodelist (string array) |
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 |
Device Group Property: Fence_level (enum) |
Defines the fence
level that is used by the device group. The fence level determines the
level of consistency among the primary and secondary volumes for that device group.
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.
For
more information about setting this property, see How to Add a Data Replication Device Group to a Hitachi TrueCopy or Universal Replicator Protection Group. Tuning recommendations: This property can
only be tuned when the protection group is offline. Category: Required Default: None |
Data Replication Property:
Ctgid (integer) |
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 device groups 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 device group to a protection group results in an
error if the CTGID of the device group differs from the CTGID of
the protection group. A device group 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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