分类目录归档：Oracle备份恢复

dul恢复truncate表测试

发表于 2013 年 2 月 4 日 由 惜分飞

dul 恢复truncate 测试
准备dul测试

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     67854

SQL> desc t_xifenfei
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------

 OWNER                                              VARCHAR2(30)
 OBJECT_NAME                                        VARCHAR2(128)
 SUBOBJECT_NAME                                     VARCHAR2(30)
 OBJECT_ID                                          NUMBER
 DATA_OBJECT_ID                                     NUMBER
 OBJECT_TYPE                                        VARCHAR2(19)
 CREATED                                            DATE
 LAST_DDL_TIME                                      DATE
 TIMESTAMP                                          VARCHAR2(19)
 STATUS                                             VARCHAR2(7)
 TEMPORARY                                          VARCHAR2(1)
 GENERATED                                          VARCHAR2(1)
 SECONDARY                                          VARCHAR2(1)
 NAMESPACE                                          NUMBER
 EDITION_NAME                                       VARCHAR2(30)

SQL> select object_id,data_object_id from user_objects where object_name='T_XIFENFEI';

 OBJECT_ID DATA_OBJECT_ID
---------- --------------
     68332          68332

SQL> TRUNCATE TABLE T_XIFENFEI;

Table truncated.

SQL> ALTER SYSTEM CHECKPOINT;

System altered.

SQL> select object_id,data_object_id from user_objects where object_name='T_XIFE
NFEI';

 OBJECT_ID DATA_OBJECT_ID
---------- --------------
     68332          68468

SQL> SELECT TABLESPACE_NAME FROM DBA_SEGMENTS WHERE SEGMENT_NAME='T_XIFENFEI';

TABLESPACE_NAME
------------------------------
USERS

SQL> SELECT FILE_ID FROM DBA_DATA_FILES WHERE TABLESPACE_NAME='USERS';

   FILE_ID
----------
         4


SQL> SELECT file#,RFILE#,NAME FROM V$DATAFILE;

     FILE#     RFILE# NAME
---------- ---------- --------------------------------------------------
         1          1 E:\ORACLE\ORADATA\XIFENFEI\SYSTEM01.DBF
         2          2 E:\ORACLE\ORADATA\XIFENFEI\SYSAUX01.DBF
         3          3 E:\ORACLE\ORADATA\XIFENFEI\UNDOTBS01.DBF
         4          4 E:\ORACLE\ORADATA\XIFENFEI\USERS01.DBF
         5          5 E:\ORACLE\ORADATA\XIFENFEI\UNDO01.DBF
         6          6 E:\ORACLE\ORADATA\XIFENFEI\CZUM01.DBF

6 rows selected.

备注说明：因为我们为了测试，所以直接查询出来了data_object_id，在实际的恢复中，我们需要使用logminer来找出来历史dataobj#

dul恢复truncate 表

e:\dul10>dul.exe

Data UnLoader 10.2.4.37 - Oracle Internal Only - on Mon Feb 04 00:20:08 2013
with 64-bit io functions

Copyright (c) 1994 2010 Bernard van Duijnen All rights reserved.

 Strictly Oracle Internal use Only



DUL: Warning: Recreating file "dul.log"
Reading USER.dat 65 entries loaded
Reading OBJ.dat 67944 entries loaded and sorted 67944 entries
Reading SCANNEDLOBPAGE.dat 8 entries loaded and sorted 8 entries
Reading TAB.dat 1869 entries loaded
Reading COL.dat 77409 entries loaded and sorted 77409 entries
Reading SEG.dat 23 entries loaded
Reading EXT.dat 54 entries loaded and sorted 54 entries
Reading TABPART.dat 110 entries loaded and sorted 110 entries
Reading TABCOMPART.dat 1 entries loaded and sorted 1 entries
Reading TABSUBPART.dat 32 entries loaded and sorted 32 entries
Reading INDPART.dat 127 entries loaded and sorted 127 entries
Reading INDCOMPART.dat 0 entries loaded and sorted 0 entries
Reading INDSUBPART.dat 0 entries loaded and sorted 0 entries
Reading IND.dat 3729 entries loaded
Reading LOB.dat
DUL: Warning: Increased the size of DC_LOBS from 1024 to 8192 entries
 1109 entries loaded
Reading ICOL.dat 4868 entries loaded
Reading COLTYPE.dat 2823 entries loaded
Reading TYPE.dat 2082 entries loaded
Reading ATTRIBUTE.dat 8736 entries loaded
Reading COLLECTION.dat 591 entries loaded
Reading COMPATSEG.dat 0 entries loaded
Reading BOOTSTRAP.dat 60 entries loaded
Reading LOBFRAG.dat 1 entries loaded and sorted 1 entries
Reading LOBCOMPPART.dat 0 entries loaded and sorted 0 entries
Reading UNDO.dat 24 entries loaded
Reading TS.dat 7 entries loaded
Reading PROPS.dat 36 entries loaded
Database character set is ZHS16GBK
Database national character set is AL16UTF16
Found db_id = 1422012639
Found db_name = XIFENFEI

DUL> SCAN DATAFILE 4;

DUL: Warning: Recreating file "EXT.dat"
DUL: Warning: Recreating file "SEG.dat"
DUL: Warning: Recreating file "COMPATSEG.dat"
DUL: Warning: Recreating file "SCANNEDLOBPAGE.dat"
Scanning tablespace 4, data file 4 ...
  23 segment header and 1601 data blocks
  tablespace 4, data file 4: 2079 blocks scanned
Reading EXT.dat 54 entries loaded and sorted 54 entries
Reading SEG.dat 23 entries loaded
Reading COMPATSEG.dat 0 entries loaded
Reading SCANNEDLOBPAGE.dat 8 entries loaded and sorted 8 entries

DUL>  ALTER SESSION SET USE_SCANNED_EXTENT_MAP = TRUE;
Parameter altered
DUL> scan extents;

DUL: Warning: Recreating file "seen_tab.dat"
DUL: Warning: Recreating file "seen_col.dat"
Scanning extents without segment header

Scanning extent id (dba 0, obj 68332)

Analyzing segment: data object id 68332
  heap organized table
Col    Seen  Max PCT  PRINT  NUMBERS DATES TIMESTAMP WITH TZ INTRVAL  ROWIDS LOB

 no   count Size NUL 75%100% AnyNice AnyNice AnyNice AnyNice Y2M D2S AnyNice
  1   67854   18   0 100 100   0   0   0   0   0   0   0   0   0   0  44   0   0

…………
 14   67854    2   0   0   0 100 100   0   0   0   0   0   0   0   0   0   0   0

|SYS| |C_FILE#_BLOCK#| || |8| |8| |CLUSTER| |20-JAN-2013 AD 17:13:18| |20-JAN-20
…………
:18| |2013-01-20:17:13:18| |VALID| |N| |N| |N| |1|

UNLOAD TABLE OBJNO68332 ( COL001 VARCHAR2(18), COL002 VARCHAR2(30), COL003 VARCH
AR2(27)
        , COL004 NUMBER, COL005 NUMBER, COL006 VARCHAR2(18), COL007 DATE
        , COL008 DATE, COL009 VARCHAR2(19), COL010 VARCHAR2(7), COL011 VARCHAR2(
1)
        , COL012 VARCHAR2(1), COL013 VARCHAR2(1), COL014 NUMBER )
    STORAGE( DATAOBJNO 68332 );

--自己拼接语句
DUL> UNLOAD TABLE t_xifenfei_1(OWNER VARCHAR2(30),OBJECT_NAME  VARCHAR2(128),SUB
OBJECT_NAME    VARCHAR2(30),OBJECT_ID  NUMBER,DATA_OBJECT_ID    NUMBER,OBJECT_TY
PE  VARCHAR2(19),CREATED    DATE,LAST_DDL_TIME DATE,TIMESTAMP    VARCHAR2(19),ST
ATUS VARCHAR2(7),TEMPORARY    VARCHAR2(1),GENERATED    VARCHAR2(1),SECONDARY
VARCHAR2(1),NAMESPACE    NUMBER,EDITION_NAME VARCHAR2(30))  STORAGE( DATAOBJNO 6
8332 );
. unloading table              T_XIFENFEI_1
DUL: Warning: Recreating file "T_XIFENFEI_1.ctl"
   67854 rows unloaded

补充说明：
1.在最新的dul 10.2.0.5.20中，不支持scan extents命令
2.在最新的dul 10.2.0.5.20中，挖出来的无数据字典数据，字符串转换为16进制值

发表在 非常规恢复 | 标签为 , | 评论关闭

table中各种类型block坏块是否能被跳过

发表于 2013 年 2 月 3 日 由 惜分飞

在table遇到的各种坏块中，大部分情况，我们都可以通过设置event 10231或者dbms_repair来跳过坏块，抢救其他数据；但是在部分情况下，我们设置了他们依然不能跳过坏块，数据库依然报ORA-01578,本文测试了table中各种类型的block，证明在哪些blog出现异常之后不能被跳过.
如果是事务数据块出现坏块可以通过dbms_repair.skip_corrupt_blocks来标记坏块(也可以使用event 10231)来实现；对于BITMAP BLOCK如果出现坏块不会对于读取数据无影响(至于其他操作,请见后续blog)；SEGMENT HEADER如果出现坏块，无法通过跳过坏块来实现获取其他数据(正常block)
创建测试表

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

SQL> create table t_xifenfei 
  2  tablespace users 
  3  as
  4  select * from dba_objects;

Table created.

SQL>  select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74663

查询相关block信息

SQL> select SEGMENT_NAME,HEADER_FILE,HEADER_BLOCK,blocks,extents from DBA_SEGMENTS 
  2  WHERE OWNER='CHF' AND SEGMENT_NAME='T_XIFENFEI';

SEGMENT_NAME    HEADER_FILE HEADER_BLOCK     BLOCKS    EXTENTS
--------------- ----------- ------------ ---------- ----------
T_XIFENFEI                4          378       1152         24

SQL>   select   
  2    dbms_rowid.rowid_relative_fno(rowid)rel_fno,
  3    max(dbms_rowid.rowid_block_number(rowid)) max_block,
  4    min(dbms_rowid.rowid_block_number(rowid)) min_block
  5    from chf.t_xifenfei 
  6    group by dbms_rowid.rowid_relative_fno(rowid);

   REL_FNO  MAX_BLOCK  MIN_BLOCK
---------- ---------- ----------
         4       1728        379

SQL> select EXTENT_ID,FILE_ID,BLOCK_ID,blocks from dba_extents where owner='CHF'
   2  AND SEGMENT_NAME='T_XIFENFEI';

 EXTENT_ID    FILE_ID   BLOCK_ID     BLOCKS
---------- ---------- ---------- ----------
         0          4        376          8
         1          4        640          8
         2          4        648          8
         3          4        656          8
         4          4        664          8
         5          4        672          8
         6          4        680          8
         7          4        688          8
         8          4        696          8
         9          4        704          8
        10          4        712          8
        11          4        720          8
        12          4        728          8
        13          4        736          8
        14          4        744          8
        15          4        752          8
        16          4        768        128
        17          4        896        128
        18          4       1024        128
        19          4       1152        128
        20          4       1280        128
        21          4       1408        128
        22          4       1536        128
        23          4       1664        128

通过这里可以知道:真正的存储数据是从block 379开始,至于block 376、377、378是什么，使用dump block分析

验证block类型

SQL> alter system dump datafile 4 block 376;

System altered.

SQL> alter system dump datafile 4 block 377;

System altered.

SQL> alter system dump datafile 4 block 378;

System altered.

SQL> alter system dump datafile 4 block 379;

System altered.

--该block是另外extent的开始，所以也尝试分析是否有特殊之处
SQL> alter system dump datafile 4 block 640;

System altered.

--dump 文件header信息
Start dump data blocks tsn: 4 file#:4 minblk 376 maxblk 376
Block dump from cache:
Dump of buffer cache at level 4 for tsn=4 rdba=16777592
Block dump from disk:
buffer tsn: 4 rdba: 0x01000178 (4/376)
scn: 0x0b8c.3bfc6517 seq: 0x04 flg: 0x04 tail: 0x65172004
frmt: 0x02 chkval: 0xc8b3 type: 0x20=FIRST LEVEL BITMAP BLOCK


Start dump data blocks tsn: 4 file#:4 minblk 377 maxblk 377
Block dump from cache:
Dump of buffer cache at level 4 for tsn=4 rdba=16777593
Block dump from disk:
buffer tsn: 4 rdba: 0x01000179 (4/377)
scn: 0x0b8c.3bfc6517 seq: 0x18 flg: 0x04 tail: 0x65172118
frmt: 0x02 chkval: 0x9e8c type: 0x21=SECOND LEVEL BITMAP BLOCK


Start dump data blocks tsn: 4 file#:4 minblk 378 maxblk 378
Block dump from cache:
Dump of buffer cache at level 4 for tsn=4 rdba=16777594
BH (0x2a7f7f0c) file#: 4 rdba: 0x0100017a (4/378) class: 4 ba: 0x2a742000
  set: 5 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0,0
  dbwrid: 0 obj: 76372 objn: 76372 tsn: 4 afn: 4 hint: f
  hash: [0x3150a748,0x3150a748] lru: [0x2a7f8094,0x2a7f7ee4]
  lru-flags: hot_buffer
  ckptq: [NULL] fileq: [NULL] objq: [0x2f72dc34,0x2f72dc34] objaq: [0x2f72dc2c,0x2f72dc2c]
  st: XCURRENT md: NULL fpin: 'ktewh25: kteinicnt' tch: 1
  flags:
  LRBA: [0x0.0.0] LSCN: [0x0.0] HSCN: [0xffff.ffffffff] HSUB: [65535]
Block dump from disk:
buffer tsn: 4 rdba: 0x0100017a (4/378)
scn: 0x0b8c.3bfc651b seq: 0x01 flg: 0x04 tail: 0x651b2301
frmt: 0x02 chkval: 0xb2ae type: 0x23=PAGETABLE SEGMENT HEADER

Start dump data blocks tsn: 4 file#:4 minblk 379 maxblk 379
Block dump from cache:
Dump of buffer cache at level 4 for tsn=4 rdba=16777595
Block dump from disk:
buffer tsn: 4 rdba: 0x0100017b (4/379)
scn: 0x0b8c.3bfc6494 seq: 0x01 flg: 0x04 tail: 0x64940601
frmt: 0x02 chkval: 0x0567 type: 0x06=trans data

Start dump data blocks tsn: 4 file#:4 minblk 640 maxblk 640
Block dump from cache:
Dump of buffer cache at level 4 for tsn=4 rdba=16777856
Block dump from disk:
buffer tsn: 4 rdba: 0x01000280 (4/640)
scn: 0x0b8c.3bfc6496 seq: 0x01 flg: 0x04 tail: 0x64960601
frmt: 0x02 chkval: 0x0efe type: 0x06=trans data

这里可以知道：
1.block 376、377为BITMAP BLOCK
2.block 378为SEGMENT HEADER(和dba_segments视图中一致)
3.除extent 0中有特殊(含BITMAP BLOCK和SEGMENT HEADER)block，其他extent只包含事务数据

测试block 640

--block 640包含条数
SQL> select   count(rowid)
  2    from chf.t_xifenfei 
  3     where dbms_rowid.rowid_block_number(rowid)=640
  4  and dbms_rowid.rowid_relative_fno(rowid)=4;

COUNT(ROWID)
------------
          79

--bbed修改tailchk
BBED> set filename '/u01/oracle/oradata/ora11g/users01.dbf'
        FILENAME        /u01/oracle/oradata/ora11g/users01.dbf

BBED> set block 640
        BLOCK#          640

BBED> set mode edit
        MODE            Edit

BBED> p tailchk
ub4 tailchk                                 @8188     0x64960601

BBED> m /x 64960602
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 640              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 64960602 

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 640:
current = 0xf80b, required = 0xf80b

BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 640

Block 640 is corrupt
Corrupt block relative dba: 0x01000280 (file 0, block 640)
Fractured block found during verification
Data in bad block:
 type: 6 format: 2 rdba: 0x01000280
 last change scn: 0x0b8c.3bfc6496 seq: 0x1 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x02069664
 check value in block header: 0xf80b
 computed block checksum: 0x0


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 2
Message 531 not found;  product=RDBMS; facility=BBED

--查询坏块
SQL> select count(*) from chf.t_xifenfei;
select count(*) from chf.t_xifenfei
                         *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 640)
ORA-01110: data file 4: '/u01/oracle/oradata/ora11g/users01.dbf'

--跳过坏块
SQL> exec dbms_repair.skip_corrupt_blocks('CHF','T_XIFENFEI');

PL/SQL procedure successfully completed.

SQL>  select skip_corrupt from dba_tables where table_name='T_XIFENFEI' AND OWNER='CHF';

SKIP_COR
--------
ENABLED

SQL>  select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74584

--修复坏块
BBED> m /x 01069664
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 640              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 01069664 

 <32 bytes per line>

BBED> p tailchk
ub4 tailchk                                 @8188     0x64960601

BBED> sum apply
Check value for File 0, Block 640:
current = 0x0efe, required = 0x0efe

BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 640


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 1
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 0
Total Blocks Influx           : 0
Message 531 not found;  product=RDBMS; facility=BBED

--除掉标记表坏块
SQL> BEGIN
  2  DBMS_REPAIR.SKIP_CORRUPT_BLOCKS (
  3  SCHEMA_NAME => 'CHF',
  4  OBJECT_NAME => 'T_XIFENFEI',
  5  OBJECT_TYPE => dbms_repair.table_object,
  6  FLAGS => dbms_repair.NOSKIP_FLAG);
  7  END;
  8  /

PL/SQL procedure successfully completed.

SQL> select skip_corrupt from dba_tables where table_name='T_XIFENFEI' AND OWNER='CHF';

SKIP_COR
--------
DISABLED

--查询表记录正常
SQL>  select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74663

在后续的操作中，也是按照类似步骤操作，考虑到篇幅有限，部分过程不再贴出来

测试block 379

SQL>  select count(*) from chf.t_xifenfei;
 select count(*) from chf.t_xifenfei
                          *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 379)
ORA-01110: data file 4: '/u01/oracle/oradata/ora11g/users01.dbf'


SQL> exec dbms_repair.skip_corrupt_blocks('CHF','T_XIFENFEI');

PL/SQL procedure successfully completed.

SQL> select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74575

测试block 378

BBED> set block 378
        BLOCK#          378

--segment header 不支持bbed查看结构
BBED> p tailchk
BBED-00400: invalid blocktype (35)

BBED> map
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 378                                   Dba:0x00000000
------------------------------------------------------------
BBED-00400: invalid blocktype (35)


BBED> set offset 8188
        OFFSET          8188

BBED> d
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 378              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 01231b65 

 <32 bytes per line>

BBED> m /x 651b2302
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 378              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 651b2302 

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 378:
current = 0xedf2, required = 0xedf2

--验证坏块
BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 378

Block 378 is corrupt
Corrupt block relative dba: 0x0100017a (file 0, block 378)
Fractured block found during verification
Data in bad block:
 type: 35 format: 2 rdba: 0x0100017a
 last change scn: 0x0b8c.3bfc651b seq: 0x1 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x02231b65
 check value in block header: 0xedf2
 computed block checksum: 0x0


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 2
Message 531 not found;  product=RDBMS; facility=BBED


SQL>  select count(*) from chf.t_xifenfei;
 select count(*) from chf.t_xifenfei
                          *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 378)
ORA-01110: data file 4: '/u01/oracle/oradata/ora11g/users01.dbf'

--标记跳过坏块
SQL> exec dbms_repair.skip_corrupt_blocks('CHF','T_XIFENFEI');

PL/SQL procedure successfully completed.

--查询依然失败
SQL> select count(*) from chf.t_xifenfei;
select count(*) from chf.t_xifenfei
                         *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 4, block # 378)
ORA-01110: data file 4: '/u01/oracle/oradata/ora11g/users01.dbf'

测试block 377

BBED> m /x 18211766
Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 377              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 18211766 

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 377:
current = 0x9d8c, required = 0x9d8c

--bbed验证为坏块
BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 377

Block 377 is corrupt
Corrupt block relative dba: 0x01000179 (file 0, block 377)
Fractured block found during verification
Data in bad block:
 type: 33 format: 2 rdba: 0x01000179
 last change scn: 0x0b8c.3bfc6517 seq: 0x18 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x66172118
 check value in block header: 0x9d8c
 computed block checksum: 0x0


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 2
Message 531 not found;  product=RDBMS; facility=BBED

--dbv验证为坏块
[oracle@xifenfei ~]$ dbv file=/u01/oracle/oradata/ora11g/users01.dbf

DBVERIFY: Release 11.2.0.3.0 - Production on Fri Jan 18 03:32:18 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /u01/oracle/oradata/ora11g/users01.dbf
Page 377 is influx - most likely media corrupt
Corrupt block relative dba: 0x01000179 (file 4, block 377)
Fractured block found during dbv: 
Data in bad block:
 type: 33 format: 2 rdba: 0x01000179
 last change scn: 0x0b8c.3bfc6517 seq: 0x18 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x66172118
 check value in block header: 0x9d8c
 computed block checksum: 0x0



DBVERIFY - Verification complete

Total Pages Examined         : 2560
Total Pages Processed (Data) : 1434
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 10
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 213
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 902
Total Pages Marked Corrupt   : 1
Total Pages Influx           : 1
Total Pages Encrypted        : 0
Highest block SCN            : 1006486374 (2956.1006486374)

--查询表记录
SQL> select skip_corrupt from dba_tables where table_name='T_XIFENFEI' AND OWNER='CHF';

SKIP_COR
--------
DISABLED

SQL> select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74663

测试block 376

BBED> m /x 04201766
 File: /u01/oracle/oradata/ora11g/users01.dbf (0)
 Block: 376              Offsets: 8188 to 8191           Dba:0x00000000
------------------------------------------------------------------------
 04201766 

 <32 bytes per line>

BBED> sum apply
Check value for File 0, Block 376:
current = 0xcbb3, required = 0xcbb3

BBED> verify
DBVERIFY - Verification starting
FILE = /u01/oracle/oradata/ora11g/users01.dbf
BLOCK = 376

Block 376 is corrupt
Corrupt block relative dba: 0x01000178 (file 0, block 376)
Fractured block found during verification
Data in bad block:
 type: 32 format: 2 rdba: 0x01000178
 last change scn: 0x0b8c.3bfc6517 seq: 0x4 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0x66172004
 check value in block header: 0xcbb3
 computed block checksum: 0x0


DBVERIFY - Verification complete

Total Blocks Examined         : 1
Total Blocks Processed (Data) : 0
Total Blocks Failing   (Data) : 0
Total Blocks Processed (Index): 0
Total Blocks Failing   (Index): 0
Total Blocks Empty            : 0
Total Blocks Marked Corrupt   : 1
Total Blocks Influx           : 2
Message 531 not found;  product=RDBMS; facility=BBED

SQL>  select count(*) from chf.t_xifenfei;

  COUNT(*)
----------
     74663

通过测试证明，如果是事务数据块出现坏块可以通过dbms_repair.skip_corrupt_blocks来标记坏块(也可以使用event 10231)来实现；对于BITMAP BLOCK如果出现坏块不会对于读取数据无影响(至于其他操作,请见table中各种坏块对select/dml操作影响)；SEGMENT HEADER如果出现坏块，无法通过跳过坏块来实现获取其他数据(正常block)

发表在 Oracle备份恢复 | 标签为 | 评论关闭

ORACLE 12C备份与恢复测试

发表于 2012 年 12 月 13 日 由 惜分飞

12C引进了pdb的概念,使得rman的恢复相对来说复杂了一些,这里对pdb的常规备份和恢复进行了简单测试,供大家参考
cdb启动和pdb关系测试

[oracle@xifenfei tmp]$ sqlplus / as sysdba

SQL*Plus: Release 12.1.0.0.2 Beta on Wed Dec 12 23:48:02 2012

Copyright (c) 1982, 2012, Oracle.  All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.0.2 - 64bit     
With the Partitioning, OLAP, Data Mining and Real Application Testing options


SQL> startup
ORACLE instance started.

Total System Global Area  939495424 bytes
Fixed Size                  2267128 bytes
Variable Size             662702088 bytes
Database Buffers          268435456 bytes
Redo Buffers                6090752 bytes
Database mounted.
Database opened.
SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID       DBID NAME                           OPEN_MODE
---------- ---------- ------------------------------ ----------
         2 4043918109 PDB$SEED                       READ ONLY
         3 2346805300 LX1                            MOUNTED
         4 2385557792 LX2                            MOUNTED
         5 1565384817 FF                             MOUNTED

SQL> alter pluggable database all open;

Pluggable database altered.

SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID       DBID NAME                           OPEN_MODE
---------- ---------- ------------------------------ ----------
         2 4043918109 PDB$SEED                       READ ONLY
         3 2346805300 LX1                            READ WRITE
         4 2385557792 LX2                            READ WRITE
         5 1565384817 FF                             READ WRITE

证明直接startup cdb里面的pdb不会自动open,需要手工进行open

rman使用cdb备份数据库

[oracle@xifenfei ~]$ rman target /

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 21:36:08 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> backup filesperset = 5 as compressed backupset database format '/tmp/full_db_%U';

Starting backup at 12-DEC-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=259 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u01/app/oracle/oradata/xifenfei/system01.dbf
input datafile file number=00010 name=/u01/app/oracle/oradata/xifenfei/LX2/system01.dbf
input datafile file number=00011 name=/u01/app/oracle/oradata/xifenfei/LX2/sysaux01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/full_db_06nsn3uq_1_1 tag=TAG20121212T213626 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00019 name=/u01/app/oracle/oradata/xifenfei/xffexample01.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/xifenfei/undotbs01.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/xifenfei/LX1/system01.dbf
input datafile file number=00018 name=/u01/app/oracle/oradata/xifenfei/xffSAMPLE_SCHEMA_users01.dbf
input datafile file number=00008 name=/u01/app/oracle/oradata/xifenfei/LX1/sysaux01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/full_db_07nsn407_1_1 tag=TAG20121212T213626 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00017 name=/u01/app/oracle/oradata/xifenfei/xffsysaux01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/xifenfei/pdbseed/system01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/xifenfei/pdbseed/sysaux01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/full_db_08nsn41l_1_1 tag=TAG20121212T213626 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:15
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/u01/app/oracle/oradata/xifenfei/sysaux01.dbf
input datafile file number=00016 name=/u01/app/oracle/oradata/xifenfei/xffsystem01.dbf
input datafile file number=00006 name=/u01/app/oracle/oradata/xifenfei/users01.dbf
input datafile file number=00009 name=/u01/app/oracle/oradata/xifenfei/LX1/LX1_users01.dbf
input datafile file number=00012 name=/u01/app/oracle/oradata/xifenfei/LX2/LX2_users01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/full_db_09nsn440_1_1 tag=TAG20121212T213626 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/full_db_0ansn45d_1_1 tag=TAG20121212T213626 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 12-DEC-12

RMAN> list backup summary;


List of Backups
===============
Key     TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
------- -- -- - ----------- --------------- ------- ------- ---------- ---
1       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213250
2       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213626
3       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213626
4       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213626
5       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213626
6       B  F  A DISK        12-DEC-12       1       1       YES        TAG20121212T213626

RMAN> report schema;

Report of database schema for database with db_unique_name xifenfei

List of Permanent Datafiles
===========================
File Size(MB) Tablespace           RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1    700      SYSTEM               ***     /u01/app/oracle/oradata/xifenfei/system01.dbf
2    210      PDB$SEED:SYSTEM      ***     /u01/app/oracle/oradata/xifenfei/pdbseed/system01.dbf
3    550      SYSAUX               ***     /u01/app/oracle/oradata/xifenfei/sysaux01.dbf
4    165      PDB$SEED:SYSAUX      ***     /u01/app/oracle/oradata/xifenfei/pdbseed/sysaux01.dbf
5    310      UNDOTBS1             ***     /u01/app/oracle/oradata/xifenfei/undotbs01.dbf
6    5        USERS                ***     /u01/app/oracle/oradata/xifenfei/users01.dbf
7    210      LX1:SYSTEM           ***     /u01/app/oracle/oradata/xifenfei/LX1/system01.dbf
8    165      LX1:SYSAUX           ***     /u01/app/oracle/oradata/xifenfei/LX1/sysaux01.dbf
9    5        LX1:USERS            ***     /u01/app/oracle/oradata/xifenfei/LX1/LX1_users01.dbf
10   210      LX2:SYSTEM           ***     /u01/app/oracle/oradata/xifenfei/LX2/system01.dbf
11   165      LX2:SYSAUX           ***     /u01/app/oracle/oradata/xifenfei/LX2/sysaux01.dbf
12   5        LX2:USERS            ***     /u01/app/oracle/oradata/xifenfei/LX2/LX2_users01.dbf
16   270      FF:SYSTEM            ***     /u01/app/oracle/oradata/xifenfei/xffsystem01.dbf
17   570      FF:SYSAUX            ***     /u01/app/oracle/oradata/xifenfei/xffsysaux01.dbf
18   5        FF:USERS             ***     /u01/app/oracle/oradata/xifenfei/xffSAMPLE_SCHEMA_users01.dbf
19   341      FF:EXAMPLE           ***     /u01/app/oracle/oradata/xifenfei/xffexample01.dbf

List of Temporary Files
=======================
File Size(MB) Tablespace           Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1    530      TEMP                 32767       /u01/app/oracle/oradata/xifenfei/temp01.dbf
2    20       PDB$SEED:TEMP        32767       /u01/app/oracle/oradata/xifenfei/pdbseed/temp01.dbf
3    20       LX1:TEMP             32767       /u01/app/oracle/oradata/xifenfei/LX1/temp01.dbf
4    20       LX2:TEMP             32767       /u01/app/oracle/oradata/xifenfei/LX2/temp01.dbf
5    20       FF:TEMP              32767       /u01/app/oracle/oradata/xifenfei/xfftemp01.dbf

试验证明:通过rman通过cdb库的备份,可以实现对对应的cdb和所包含的pdb进行备份

配置pdb访问tns

[oracle@xifenfei ~]$ lsnrctl status

LSNRCTL for Linux: Version 12.1.0.0.2        on 12-DEC-2012 22:33:27

Copyright (c) 1991, 2012, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xifenfei)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 12.1.0.0.2       
Start Date                12-DEC-2012 22:31:55
Uptime                    0 days 0 hr. 1 min. 32 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/12.1/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/xifenfei/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xifenfei)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xifenfei)(PORT=5500))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "ff" has 1 instance(s).
  Instance "xff", status READY, has 1 handler(s) for this service...
Service "xifenfei" has 1 instance(s).
  Instance "xff", status READY, has 1 handler(s) for this service...
Service "lx1" has 1 instance(s).
  Instance "xff", status READY, has 1 handler(s) for this service...
Service "lx2" has 1 instance(s).
  Instance "xff", status READY, has 1 handler(s) for this service...
Service "xffXDB" has 1 instance(s).
  Instance "xff", status READY, has 1 handler(s) for this service...
The command completed successfully

[oracle@xifenfei admin]$ vi tnsnames.ora 
lx1 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xifenfei)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = lx1)
    )
  )
ff =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xifenfei)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ff)
    )
  )

sqlplus访问pdb

[oracle@xifenfei admin]$ sqlplus sys@lx1 as sysdba

SQL*Plus: Release 12.1.0.0.2 Beta on Wed Dec 12 22:35:07 2012

Copyright (c) 1982, 2012, Oracle.  All rights reserved.

Enter password: 

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.0.2 - 64bit     
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> show con_name;

CON_NAME
------------------------------
LX1

SQL> create user xff identified by xifenfei;

User created.

SQL> GRANT SYSDBA TO XFF;

Grant succeeded.

rman备份pdb数据库

[oracle@xifenfei admin]$ rman target xff/xifenfei@lx1

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 22:44:46 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> backup filesperset = 5 as compressed backupset database format '/tmp/lx1_db_%U';

Starting backup at 12-DEC-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=256 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00007 name=/u01/app/oracle/oradata/xifenfei/LX1/system01.dbf
input datafile file number=00008 name=/u01/app/oracle/oradata/xifenfei/LX1/sysaux01.dbf
input datafile file number=00009 name=/u01/app/oracle/oradata/xifenfei/LX1/LX1_users01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/lx1_db_0bnsn80f_1_1 tag=TAG20121212T224534 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:25
Finished backup at 12-DEC-12

RMAN> report schema;

Report of database schema for database with db_unique_name xifenfei

List of Permanent Datafiles
===========================
File Size(MB) Tablespace           RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
7    210      LX1:SYSTEM           ***     /u01/app/oracle/oradata/xifenfei/LX1/system01.dbf
8    165      LX1:SYSAUX           ***     /u01/app/oracle/oradata/xifenfei/LX1/sysaux01.dbf
9    5        LX1:USERS            ***     /u01/app/oracle/oradata/xifenfei/LX1/LX1_users01.dbf

List of Temporary Files
=======================
File Size(MB) Tablespace           Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
3    20       LX1:TEMP             32767       /u01/app/oracle/oradata/xifenfei/LX1/temp01.dbf

rman通过cdb备份pdb

[oracle@xifenfei admin]$ rman target /

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 23:02:07 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> backup filesperset = 5 as compressed backupset pluggable database FF format '/tmp/ff_db_%U';

Starting backup at 12-DEC-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=262 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00017 name=/u01/app/oracle/oradata/xifenfei/xffsysaux01.dbf
input datafile file number=00019 name=/u01/app/oracle/oradata/xifenfei/xffexample01.dbf
input datafile file number=00016 name=/u01/app/oracle/oradata/xifenfei/xffsystem01.dbf
input datafile file number=00018 name=/u01/app/oracle/oradata/xifenfei/xffSAMPLE_SCHEMA_users01.dbf
channel ORA_DISK_1: starting piece 1 at 12-DEC-12
channel ORA_DISK_1: finished piece 1 at 12-DEC-12
piece handle=/tmp/ff_db_0cnsn8vm_1_1 tag=TAG20121212T230214 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:26
Finished backup at 12-DEC-12

模拟pdb库全库恢复

SQL> conn xff/xifenfei@lx1 as sysdba
Connected.

SQL> create table t_xifenfei as select * from dba_objects;

Table created.

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     19121

--在pdb中不能切换日志(因为日志是全局的)
SQL> alter system switch logfile;
alter system switch logfile
*
ERROR at line 1:
ORA-65040: operation not allowed from within a pluggable database

SQL> shutdown immediate;
Pluggable Database closed.

--删除数据文件
[oracle@xifenfei admin]$ rm /u01/app/oracle/oradata/xifenfei/LX1/*

--rman基于cdb恢复pdb库
[oracle@xifenfei ~]$ rman target /

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 23:11:22 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> restore pluggable database lx1;

Starting restore at 12-DEC-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=25 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/xifenfei/LX1/system01.dbf
channel ORA_DISK_1: restoring datafile 00008 to /u01/app/oracle/oradata/xifenfei/LX1/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00009 to /u01/app/oracle/oradata/xifenfei/LX1/LX1_users01.dbf
channel ORA_DISK_1: reading from backup piece /tmp/lx1_db_0bnsn80f_1_1
channel ORA_DISK_1: piece handle=/tmp/lx1_db_0bnsn80f_1_1 tag=TAG20121212T224534
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:25
Finished restore at 12-DEC-12

RMAN> recover pluggable database lx1;

Starting recover at 12-DEC-12
using channel ORA_DISK_1

starting media recovery
media recovery complete, elapsed time: 00:00:01

Finished recover at 12-DEC-12

RMAN> alter pluggable database lx1 open;

Statement processed

--验证恢复结果
SQL> conn xff/xifenfei@lx1 as sysdba
Connected.

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     19121

试验证明:对于pdb库的备份,使用rman可以在cdb级别进行还原和恢复

模拟数据文件恢复

SQL> create table t_xifenfei tablespace example
  2   as
  3    select * from dba_objects;

Table created.

SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     89604

SQL> col name for a60 
SQL> set lines 134
SQL> select file#,name from v$datafile;

     FILE# NAME
---------- -----------------------------------------------------------
         5 /u01/app/oracle/oradata/xifenfei/undotbs01.dbf
        16 /u01/app/oracle/oradata/xifenfei/xffsystem01.dbf
        17 /u01/app/oracle/oradata/xifenfei/xffsysaux01.dbf
        18 /u01/app/oracle/oradata/xifenfei/xffSAMPLE_SCHEMA_users01.dbf
        19 /u01/app/oracle/oradata/xifenfei/xffexample01.dbf

--离线含测试数据的数据文件
SQL> alter database datafile 19 offline;

Database altered.

--删除数据文件
SQL> !rm /u01/app/oracle/oradata/xifenfei/xffexample01.dbf

SQL> !ls -l /u01/app/oracle/oradata/xifenfei/xffexample01.dbf
ls: /u01/app/oracle/oradata/xifenfei/xffexample01.dbf: No such file or directory


--尝试pdb级别恢复
[oracle@xifenfei ~]$ rman target sys/xifenfei@ff

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 23:29:03 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> restore datafile 19;

Starting restore at 12-DEC-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 12/12/2012 23:29:15
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 19 found to restore

--pdb级别不能识别对应数据文件(一种可能是我在cdb级别备份FF库,另一种可能bug)
RMAN> list backup of datafile 19;

specification does not match any backup in the repository

--在cdb级别还原
[oracle@xifenfei tmp]$ rman target /

Recovery Manager: Release 12.1.0.0.2        on Wed Dec 12 23:44:21 2012

Copyright (c) 1982, 2012, Oracle and/or its affiliates.  All rights reserved.

connected to target database: xifenfei (DBID=2412861330)

RMAN> list backup of datafile 19;

using target database control file instead of recovery catalog

List of Backup Sets
===================


BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
3       Full    76.81M     DISK        00:00:44     12-DEC-12      
        BP Key: 3   Status: AVAILABLE  Compressed: YES  Tag: TAG20121212T213626
        Piece Name: /tmp/full_db_07nsn407_1_1
  List of Datafiles in backup set 3
  File LV Type Ckp SCN    Ckp Time  Name
  ---- -- ---- ---------- --------- ----
  19      Full 1860043    12-DEC-12 /u01/app/oracle/oradata/xifenfei/xffexample01.dbf

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
8       Full    189.52M    DISK        00:01:25     12-DEC-12      
        BP Key: 8   Status: AVAILABLE  Compressed: YES  Tag: TAG20121212T230214
        Piece Name: /tmp/ff_db_0cnsn8vm_1_1
  List of Datafiles in backup set 8
  File LV Type Ckp SCN    Ckp Time  Name
  ---- -- ---- ---------- --------- ----
  19      Full 1860043    12-DEC-12 /u01/app/oracle/oradata/xifenfei/xffexample01.dbf

RMAN> restore datafile 19;

Starting restore at 12-DEC-12
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=28 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00019 to /u01/app/oracle/oradata/xifenfei/xffexample01.dbf
channel ORA_DISK_1: reading from backup piece /tmp/ff_db_0cnsn8vm_1_1
channel ORA_DISK_1: piece handle=/tmp/ff_db_0cnsn8vm_1_1 tag=TAG20121212T230214
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:45
Finished restore at 12-DEC-12

--cdb级别恢复数据文件
RMAN> recover datafile 19;

Starting recover at 12-DEC-12
using channel ORA_DISK_1

starting media recovery
media recovery complete, elapsed time: 00:00:01

Finished recover at 12-DEC-12

--cdb级别不能直接online
RMAN> alter database datafile 19 online;

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of sql statement command at 12/12/2012 23:46:15
ORA-01516: nonexistent log file, data file, or temporary file "19"

RMAN> alter pluggable database ff datafile 19 online;

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of sql statement command at 12/12/2012 23:47:53
ORA-65046: operation not allowed from outside a pluggable database

--进入pdb库进行online
SQL> alter database datafile 19 online;               

Database altered.

--验证数据
SQL> select count(*) from t_xifenfei;

  COUNT(*)
----------
     89604

试验证明:rman通过cdb级别操作,还是一步步恢复了pdb中离线异常的数据文件

总结说明
1.rman可以比较好的操作cdb和pdb备份
2.pdb的备份和恢复可以通过cdb来完成

发表在 ORACLE 12C, rman备份/恢复 | 标签为 | 3 条评论