Creating a Protected Group for NAS File Systems

This section describes how to create a protected group at the production site for NAS File Systems that need DR protection. After the protected group is created, the system automatically matches suitable protection policies for the protected group.

Prerequisites

Context

If there are multiple NASs on the remote replication pair or consistency group, these NASs must be added to one protected group. (NASs must be created based on simple volumes.)

When the asynchronous replication (NAS) DR technology is used, ensure that all the remote replication pairs are either not or in one remote replication vStore pair.

Procedure

  1. In the menu bar, Choose Protection.
  2. Click Create.
  3. Select a protected object.

    1. Select Production Site and Disk Array.

      See OceanStor BCManager 8.3.0 eReplication Compatibility List to select the corresponding version and storage array to create protected groups for NAS file systems.

    2. Select the file systems that you want to protect.

      Set Available File System to vStore or File system.

  4. Click Next.
  5. Set a protection policy.

    1. On the Protection Policy page, the system automatically matches supported protection policies. Select a policy based on your data protection solution.

      When the asynchronous replication (NAS) DR technology is used, select Array-Based Replication (Asynchronous):Active-Passive DR solution.

      • If there are suitable protection policies, you can select a protection policy based on your data protection solution and modify the time policy of the protection policy.
      • If there is no suitable protection policy, check whether the storage devices used by protected objects have been configured as planned. If the storage devices have not been configured, configure them as planned. After configuration, perform the following operations: On the menu bar, select Resources. Select a node under the management server. In the site node, click Storage, in the line where the storage device resides, click Refresh to refresh the storage device information under the site. Then, recreate the protected group.
    2. Click Set to set the protection policy for the protected group.
      1. Click the Scheduling Policy tab. In the Time Policy area, set the time policy for the protected group. Table 1 lists related parameters.

        Table 1 Time policies

        Time Policy

        Description

        On-demand scheduling

        Manually starts protection tasks.

        Period-based scheduling

        Automatically starts protection tasks based on a period set by the system.

        NOTE:
        • To ensure data consistency, the execution timetable for a protected group policy template must be set. You are advised to set the execution time to off-peak hours.
        • Tasks can be executed at multiple time points of a day, a week, or a month. Alternatively, at a specific time segment of a day, a week, or a month with a fixed frequency.
        • It is recommended that the starting time of the validate period is set to a time later than the completion of the initial synchronization.
        • If daylight saving time (DST) is enabled on the eReplication management server, a DR protection task whose trigger time point falls within the DST shift period cannot be executed at the scheduled time. Details are as follows:

          (UTC-08:00) Pacific Time (United States and Canada) is used as an example. The DST starts at 2016-03-12 02:00:00, and ends at 2016-11-06 02:00:00.

        • If the start time of the protection policy falls within the first hour (2016-03-12 02:00:00 to 03:00:00) after the DST starts, for example, 2016-03-12 02:30:00, the protection group will be automatically executed with a delay of one hour, that is 2016-03-12 03:30:00.
        • If the start time of the protection policy falls with the last hour (2016-11-06 01:00:00 to 02:00:00) before the DST ends, for example, 2016-11-06 01:30:00, the protection group will be executed after the DST ends for half an hour.
      2. When the Scheduling Policy is set to Period-based scheduling, in the Expected RPO area, if you select Enable PRO Requirement Satisfaction Check, the actual RPO is check against the configured RPO. If the actual RPO exceeds the expected RPO, the system generates an alarm, indicating that the RPO requirement is not satisfied.

        Expected RPO can be set to 0-31 days, 0-23 hours, and 5-59 minutes.

        If days and hours are not set, the Expected RPO is 15 minutes by default.

      3. Click Replication Policy tab to set the remote replicate rate between storage arrays. Table 2 lists related parameters.

        Table 2 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.
      4. Click OK.

  6. Click Next.
  7. 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.

  8. 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.
  9. Click Finish.
  10. Click OK.

Related Operations

Parent topic: Creating a Protected Group
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