This section describes how to create a protected group at the production site for Oracle databases that need DR protection. The system automatically identifies suitable protection policies for the protected group when creating the protected group.
Prerequisites
- At least one production site has been created.
- Hosts or host groups and storage devices for host applications have been added to the production site.
Context
The protected objects belonging to one protected group reside on the same storage device. Each protected object occupies independent storage LUNs or volumes.
- If multiple applications are deployed on the primary LUN of the same remote replication pair or consistency group, ensure that all the applications belong to the same protected group. If they belong to different protected groups, some applications may become unavailable during data synchronization, planned migration, or fault recovery of the protected groups.
- When I/O loads of applications are heavy, consistency protection with quiesced databases enabled may fail. Therefore, implement consistency protection for applications during off-peak hours or disable consistency protection.
- After the eReplication Agent is re-installed on the host after being uninstalled, you need to recreate protected groups on the host.
Procedure
- In the menu bar, choose Protection.
- Click Create.
- Select a protected object type.
- Set Production Site and Production Host(Group).
- In the Available Database area, select a database to be protected.
- In the Verification dialog box that is displayed, enter necessary authentication information and click OK.
Oracle ADG: Enable this option in the Oracle ADG DR scenario.
Authentication Mode: Set Authentication Mode, which can be Database Authentication or OS Authentication.
- Database Authentication: based on an Oracle database user name.
Enter the sys user name and its password as the authentication information. If you use another user name for authentication, the database cannot be started when you recover or test it.
- OS Authentication: based on an operating system user name.
- For a single-instance database or Oracle RAC cluster deployed on ASM disk groups, you need to enable OS Authentication for the DR database as required by Oracle officially. After data is recovered, select Database Authentication for security purposes.
- In the scenario where Oracle ADG DR is enabled, you need to enter the sys user name and its password as the authentication information when you select OS Authentication.
- Database Authentication: based on an Oracle database user name.
- In the Archive Log Protection list of the Available Database area, set whether to enable protection for archive logs.
Archive logs record all operations on the databases. They are used to recover data of Oracle databases that are abnormally stopped, maximizing data security.
- If the archive log mode is enabled for the Oracle database and Archive Log Protection is disabled for the database, disable the archive log mode or configure an archive directory for the database at the DR site. Otherwise, the database cannot be started during DR.
- If the second-level period-based scheduling is used, enabling Archive Log Protection does not take effect.
- Click Next.
- Set a protection policy.
- On the Policy page, the system automatically identifies suitable protection policies. Select a policy based on your data protection solution.
- Click Set. In the Set Protection Policy dialog box, set the protection policy.
- For the ADGx synchronous replication (SAN) protection policy:
- In the Protection Policy area, click Set to set the protection policy for the protected group.
- Click Replication Policy tab to set the remote replicate rate between storage arrays. Table 1 lists related parameters.
Table 1 Replication policies Replication Policy
Description
Default configuration
The remote replication rate is the default one set on the storage array.
Manual configuration
- Users can set the remote replication rate for each time segment. Configure the automatic remote replication rate of the storage based on the pre-set replication rate of time period.
- Select Manual configuration. Click a time color block to modify the replication rate during a time segment.
- Click OK.
- For the ADGx synchronous replication (SAN) protection policy:
- Click Next.
- Set Name and Description of the protected group.
- Name: contains 4 to 32 characters, including letters, digits, underscores (_), and hyphens (-), but cannot start with a hyphen (-).
- Description: contains 0 to 255 characters.
- Optional: If you do not want to manually create a recovery plan for the protected group, select Automatically create a recovery plan after creating protected groups in the lower left corner.
- Click Finish.
- Click OK.
Related Operations
- If the protected objects of a protected group or their used storage devices change. On the menu bar, select Resources. And refresh resources or storage devices where the protected objects reside. Then go to the protected group page and refresh protected objects of the protected group by clicking More > Refresh. After the command for refreshing information is sent, you can view details about the command execution in Background Task.
If a recovery plan has been created for a protected group, you can refresh protected objects only when the recovery plan status is Ready, Clear completed, or Reprotection completed.
- To ensure that information about protected groups is refreshed successfully, you must refresh information about storage devices and hosts at both the production site and DR site.