Move datafile on Primary not replicted on Standby Database

Question

I'm using an automated script to move datafiles between partitions on my standby database, this ensures that only recent data is on the faster fibre channel disks, and older data is on SATA disks.
The commands it uses:
1. alter tablepspace offline;
2. unix command to mv data file from one partition to another.
3. alter tablepspace <tbname> rename datafile ' old datafile path' to 'new datafile path';
4. alter tablepspace online;
This works fine on the primary database, but the standby is not moving the datafiles.
Any help as to why this is happening would be much appreciated.
Thanks.

Answer 1

And why would it be replicated? If there already is the same file on the standby, redo entries can be applied to it. Renaming of data files is
not an operation that would be visible in redo logs, it is visible only in the control file(s). Standy databases apply redo logs from the primary
database, period. That is all they do. If the change is not visible in the redo logs, it isn't applied to standby. If a file is created, dropped or
changed in size, that is communicated to the standby which reacts appropriately if the STANDBY_FILE_MANAGEMENT parameter is set to AUTO on the standby side. Redo entry contains the following information:
<ol><li>     SCN for the change.</li>
<li>     The file number to which the change was made</li>
<li>The block number of the changed block.</li>
<li>     The offset and the size of the changed information.</li>
<li>     The changed information itself.</li>
</ol>
When the standby receives the archived log file and parses that information, it applies the information to the corresponding file on
the standby side, regardless of the file name. If the file 123 exists and contains the block 9876543210, redo entry will be applied
and all will be well. There is absolutely no way by which the standby database would be able to discern the new file name. There is
absolutely no need for that. To change the file name on the standby side, do the following on the standby side:
<ol><li>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;</li>
<li>ALTER DATABASE DATAFILE 123 OFFLINE;</li>
<li>ALTER DATABASE RENAME FILE 123 TO '/my/db/path/new_file.dbf';</li>
<li>ALTER DATABASE DATAFILE 123 ONLINE;</li>
<li>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;</li>
</ol>