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Converting Synchronous Copy to Selective Copy

A synchronous copy creates additional copies of all the backup jobs (full, incremental, differential, transaction log or archive). However, if you want to make additional copies of only the full backups from a specific point in time, you can convert an existing synchronous copy to a selective copy.

Procedure

  1. From the CommCell Browser, expand Policies > Storage Policies > appropriate storage policy.
  2. Right-click the appropriate synchronous copy and click Properties.
  3. On the General tab, select the Selective Copy check box.
  4. On the Copy Policy tab and select an appropriate date from the Backups On and After list.
  5. On the Selective Copy tab, select appropriate frequencies for the full backups and click OK.
  6. Click Yes to accept the message stating that the date is changed in the Copy Policy tab.

    Note: The jobs that run after the conversion will honor the Selective copy rule.

Examples

  • Converting synchronous copy to selective copy
    • If All Backups option is selected for synchronous copy, then after conversion to selective copy, Backup on After Date option is enabled with Jan 1, 1970 date.
    • If Backup on After Data option is selected for synchronous copy with specific date, then after conversion to selective copy, the date and the enabled option remains the same.

    And, by default, the backup frequency rules is set as weekly first fulls and the week begins on Friday. The selective copy backup frequency rules (such as weekly fulls and so on) will apply only from the current date.

    For example, consider the following jobs on the synchronous copy:

    • Date1 - Job1 - Available (already copied)
    • Date2 - Job2 - Partially copied, Job3 - To be copied
    • Date3 - Job4 (Full) - To be copied; Job5 (Incremental) - To be copied
    • Date4 - Job6 (Full) To be copied

    If you converted the synchronous copy to selective copy on Date4 and selected Date3 as backup on after date, then after conversion:

    • Job1 - Available
    • Job2 - Partially available and disabled for the copy
    • Job3 - Disabled for the copy
    • Job4, Job5, Job6 - To be copied state
  • The following scenarios illustrate how the conversion affects the backup jobs::
    • Scenario 1:

      Sync1 is the synchronous copy.

      Time period: January 1 to January 4 .

      • On January 1, 1 full and 3 incremental backups are run and are in the To be copied state.
      • On January 2, 1 full backup and 3 incremental backups are run and are in the To be copied state. You want to convert the synchronous copy to selective copy at the frequency of daily last full backup. You run 1 full backup.
      • On January 3, 2 full backups and 3 incremental backups are run. The full backup will be in the To be copied state.
      • On January 4, run an auxiliary copy operation.

      The following jobs will be copied:

      • 1 full and 3 incremental backups from January 1.
      • 1 full and 3 incremental backups from January 2.

        The last full backup that ran on January 2  will not be in “To be copied” state although this is the correct backup according to the selective copy rules, because there are existing jobs from January 2 before converting to the To be copied state.

      • Last full backup from January 3.
    • Scenario 2:
      • On January 1, 1 full and 3 incremental backups are run and are in the To be copied state.
      • On January 2, you convert the synchronous copy to selective copy at a frequency of daily last full backup. After conversion, 2 full backups and 3 incremental backups are run.
      • On January 3, 1 full backup and 3 incremental backups are run. The full backup will be in the To be copied state.
      • On January 4, you run an auxiliary copy operation.

      The following jobs will be copied:

      • 1 full and 3 incremental backups from January 1.
      • Last full backup from January 2.
      • Last full backup from January 3.