Shulou(Shulou.com)06/01 Report--

Source: 12C RAC primay backup file

Target: 12C Single Instance

Partial summary:

1 pfile modified

2 disable redo thread N

3 drop logfile group N

4 rename logfile

5 Cancel log remote transfer

If primary is in maximum availability mode, the control file detects log_archive_dest_N in case log transfer is normal. So if you don't deal with it, you'll get an error:

lgwr（ora-16072）: minimum of 1 lgwr standby database required

However, because the target is a single instance, it is no longer dg, so it is necessary to perform a dg mode switch:

alter database set standby to maximize performance;

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