There have been few published examples of the online datafile relocation feature in 12c. The examples I've seen are on filesystem.
Here I show online relocation to/from ASM and FileSystem.
Note that I was courageous enough to not use the KEEP keyword (which is optional !).
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Here I show online relocation to/from ASM and FileSystem.
SQL> connect system/oracle Connected. SQL> create tablespace test_relocate; Tablespace created. SQL> create table test_relocate_tbl 2 tablespace test_relocate 3 as select * from dba_objects; Table created. SQL> select tablespace_name, bytes/1024 2 from user_segments 3 where segment_name = 'TEST_RELOCATE_TBL'; TABLESPACE_NAME BYTES/1024 ------------------------------ ---------- TEST_RELOCATE 13312 SQL> select file_name, bytes/1024 2 from dba_data_files 3 where tablespace_name = 'TEST_RELOCATE'; FILE_NAME -------------------------------------------------------------------------------- BYTES/1024 ---------- +DATA/NONCDB/DATAFILE/test_relocate.260.909444793 102400 SQL> SQL> alter database move datafile 2 '+DATA/NONCDB/DATAFILE/test_relocate.260.909444793' 3 to '/oradata/NONCDB/test_relocate_01.dbf'; Database altered. SQL> !ls -l /oradata/NONCDB total 102408 -rw-r----- 1 oracle asmdba 104865792 Apr 17 23:39 test_relocate_01.dbf SQL>
SQL> alter database move datafile 2 '/oradata/NONCDB/test_relocate_01.dbf' 3 to '+DATA'; Database altered. SQL> select file_name, bytes/1024 2 from dba_data_files 3 where tablespace_name = 'TEST_RELOCATE'; FILE_NAME -------------------------------------------------------------------------------- BYTES/1024 ---------- +DATA/NONCDB/DATAFILE/test_relocate.260.909445261 102400 SQL> SQL> !ls -l /oradata/NONCDB total 0 SQL>
Note that I was courageous enough to not use the KEEP keyword (which is optional !).
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