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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