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Oracle® Solaris Cluster Geographic Edition Data Replication Guide for Hitachi TrueCopy and Universal Replicator

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Updated: July 2016
 
 

Validations Made by the Data Replication Subsystem

When the Hitachi TrueCopy or Universal Replicator data replication component, configured as dev_group in the /etc/horcm.conf file, is added to a protection group, the data replication layer makes the following validations.

  • Validates that the horcmd daemon is running on at least one node in the Nodelist property of the protection group.

  • Checks that the path to the storage device exists from all the nodes that are specified in the Nodelist property. The storage device controls the new Hitachi TrueCopy or Universal Replicator data replication component.

  • The Hitachi TrueCopy or Universal Replicator; data replication component properties that are specified in the geopg add-replication-component command are validated as described in the following table.

Hitachi TrueCopy or Universal Replicator Data Replication Component Property
Validation
data-replication-component
Checks that the specified Hitachi TrueCopy or Universal Replicator data replication component is configured on all of the cluster nodes that are specified in the Nodelist property.
Fence_level
If a pair is already established for this Hitachi TrueCopy or Universal Replicator data replication component, the data replication layer checks that the specified Fence_level matches the already established fence level.
If a pair is not yet established, for example, if a pair is in the SMPL state, any Fence_level is accepted.

When a Hitachi TrueCopy or Universal Replicator data replication component is added to a protection group, a Oracle Solaris Cluster resource is automatically created by this command. This resource monitors data replication. The name of the resource is r-tc-protection-group-replication-component. This resource is placed in the corresponding Oracle Solaris Cluster resource group, which is named rg-tc-protection-group.


Caution

Caution  -  You must use caution before you modify these replication resources with Oracle Solaris Cluster commands. These resources are for internal implementation purposes only.