Categories: Database

#Oracle RMANでバックアップしたものを使って全損からリストアする

Oracleが全損、もしくは他サーバに同じOracleを建てたい時の備忘録。

順番は空でも覚えていたけどやり方はすっかり忘れていたのでメモしとかないダメですね。

全損から戻せればあとはきっとどんな状況でも対応できる・・・はず・・・!

概要

環境は以下のとおり

OS : Oracle Linux 5.4
Oracle Version : 11.2.0.1.0
インスタンス名 : PROD1
データファイルを置いてるディレクトリ:/u01/app/oracle/oradata/prod1
高速リカバリ領域:/u01/app/oracle/flash_recovery_area
バックアップするディレクトリ : /backup
アーカイブログモード:YES!!

rmanを使ってバックアップファイル、アーカイブログ、redoログを駆使して戻すことを想定して実施します。

バックアップ手順

データファイルと同時にアーカイブログと制御ファイルも一緒にオンラインでバックアップを取得する

$ rman target /

Recovery Manager: Release 11.2.0.1.0 - Production on Sun Oct 11 17:26:55 2015

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD1 (DBID=2038747369)

# /backupを指定して保存します。取得した後は余分なアーカイブログは削除します
RMAN> backup database format '/backup/data_%d_%U.bak.%T' include current controlfile plus archivelog delete all input format '/backup/archivelog_%d_%U.bak.%T';

Starting backup at 11-OCT-15
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=3 RECID=64 STAMP=892845306
channel ORA_DISK_1: starting piece 1 at 11-OCT-15
channel ORA_DISK_1: finished piece 1 at 11-OCT-15
piece handle=/backup/archivelog_PROD1_1pqjff7q_1_1.bak.20151011 tag=TAG20151011T203506 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: deleting archived log(s)
archived log file name=/u01/app/oracle/flash_recovery_area/PROD1/archivelog/2015_10_11/o1_mf_1_3_c1nlcbjz_.arc RECID=64 STAMP=892845306
Finished backup at 11-OCT-15

Starting backup at 11-OCT-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u01/app/oracle/oradata/prod1/system01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/prod1/sysaux01.dbf
input datafile file number=00003 name=/u01/app/oracle/oradata/prod1/undotbs01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/prod1/users01.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/orcl/tcts.dbf
channel ORA_DISK_1: starting piece 1 at 11-OCT-15
channel ORA_DISK_1: finished piece 1 at 11-OCT-15
piece handle=/backup/data_PROD1_1qqjff7s_1_1.bak.20151011 tag=TAG20151011T203508 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting 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 11-OCT-15
channel ORA_DISK_1: finished piece 1 at 11-OCT-15
piece handle=/backup/data_PROD1_1rqjff8b_1_1.bak.20151011 tag=TAG20151011T203508 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 11-OCT-15

Starting backup at 11-OCT-15
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=4 RECID=65 STAMP=892845325
channel ORA_DISK_1: starting piece 1 at 11-OCT-15
channel ORA_DISK_1: finished piece 1 at 11-OCT-15
piece handle=/backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011 tag=TAG20151011T203526 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
channel ORA_DISK_1: deleting archived log(s)
archived log file name=/u01/app/oracle/flash_recovery_area/PROD1/archivelog/2015_10_11/o1_mf_1_4_c1nlcxyp_.arc RECID=65 STAMP=892845325
Finished backup at 11-OCT-15

バックアップの確認

RMAN> list backup;


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


BS Key  Size       Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
50      6.50K      DISK        00:00:00     11-OCT-15
        BP Key: 54   Status: AVAILABLE  Compressed: NO  Tag: TAG20151011T203506
        Piece Name: /backup/archivelog_PROD1_1pqjff7q_1_1.bak.20151011

  List of Archived Logs in backup set 50
  Thrd Seq     Low SCN    Low Time  Next SCN   Next Time
  ---- ------- ---------- --------- ---------- ---------
  1    3       783810     11-OCT-15 783945     11-OCT-15

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
51      Full    454.67M    DISK        00:00:07     11-OCT-15
        BP Key: 55   Status: AVAILABLE  Compressed: NO  Tag: TAG20151011T203508
        Piece Name: /backup/data_PROD1_1qqjff7s_1_1.bak.20151011
  List of Datafiles in backup set 51
  File LV Type Ckp SCN    Ckp Time  Name
  ---- -- ---- ---------- --------- ----
  1       Full 783953     11-OCT-15 /u01/app/oracle/oradata/prod1/system01.dbf
  2       Full 783953     11-OCT-15 /u01/app/oracle/oradata/prod1/sysaux01.dbf
  3       Full 783953     11-OCT-15 /u01/app/oracle/oradata/prod1/undotbs01.dbf
  4       Full 783953     11-OCT-15 /u01/app/oracle/oradata/prod1/users01.dbf
  5       Full 783953     11-OCT-15 /u01/app/oracle/oradata/orcl/tcts.dbf

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
52      Full    9.73M      DISK        00:00:01     11-OCT-15
        BP Key: 56   Status: AVAILABLE  Compressed: NO  Tag: TAG20151011T203508
        Piece Name: /backup/data_PROD1_1rqjff8b_1_1.bak.20151011
  SPFILE Included: Modification time: 11-OCT-15
  SPFILE db_unique_name: PROD1
  Control File Included: Ckp SCN: 783963       Ckp time: 11-OCT-15
## ↑ここにSPFILEと制御ファイルが入ったバックアップがあります!!メモしておきましょう!

BS Key  Size       Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
53      6.00K      DISK        00:00:00     11-OCT-15
        BP Key: 57   Status: AVAILABLE  Compressed: NO  Tag: TAG20151011T203526
        Piece Name: /backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011

  List of Archived Logs in backup set 53
  Thrd Seq     Low SCN    Low Time  Next SCN   Next Time
  ---- ------- ---------- --------- ---------- ---------
  1    4       783945     11-OCT-15 783969     11-OCT-15

次にバックアップ後にデータを更新しておく。
まずは現在のredoログを確認する。現在はsequence 5に書き込んでいる模様

$ sqlplus / as sysdba
SYS@prod1> select GROUP#,SEQUENCE#,STATUS,FIRST_CHANGE#,NEXT_CHANGE# from v$log;

    GROUP#  SEQUENCE# STATUS        FIRST_CHANGE# NEXT_CHANGE#
---------- ---------- ---------------- ------------- ------------
  1     4 ACTIVE        783945    783969
  2     5 CURRENT        783969   2.8147E+14
  3     3 INACTIVE        783810    783945

データを書き込む

SYS@prod1> insert into dip.hoge values (1);
SYS@prod1> commit;

redoログが1週するまでアーカイブログを出力する。5は無事上書きされていきました。

SYS@prod1> alter system archive log current;
SYS@prod1> alter system archive log current;
SYS@prod1> alter system archive log current;
SYS@prod1> select GROUP#,SEQUENCE#,STATUS,FIRST_CHANGE#,NEXT_CHANGE# from v$log;

    GROUP#  SEQUENCE# STATUS        FIRST_CHANGE# NEXT_CHANGE#
---------- ---------- ---------------- ------------- ------------
  1     7 ACTIVE        784116    784136
  2     8 CURRENT        784136   2.8147E+14
  3     6 ACTIVE        784110    784116

改めて、現在のREDOログ(sequence#8)にもデータを残しておく

SYS@prod1> insert into dip.hoge values (2);
SYS@prod1> commit;

リストア手順

別サーバ、もしくは新規にOracleをインストールしなおしたサーバなどにバックアップを転送する。

$ cp data_* /backup
$ cp archivelog_* /backup

バックアップ後に出力したアーカイブログも同じbackupディレクトリにおいておく

$ cp *arc /backup

データファイルのあったディレクトリや高速リカバリ領域のディレクトリを作成しておく

$ mkdir /u01/app/oracle/oradata/prod1
$ mkdir /u01/app/oracle/flash_recovery_area

redoログもあるなら元サーバから元の位置にコピーしておく(稼働してる途中にこぴってくるでもOKだった)

cp redo*log /u01/app/oracle/oradata/prod1

パスワードファイルを作成、もしくは復元する。作成の場合は以下のとおり。

$ cd $ORACLE_HOME/dbs
$ orapwd file=orapwprod1

制御ファイルをとった時についでにspfileもバックアップされているのでそれを使ってspfileを復元し、nomountで立ち上げる。
別途spfileのバックアップを取っており、すぐ復元できるならそちらを使うでもOK

$ echo 'db_name=PROD1' > $ORACLE_HOME/dbs/initprod1.ora
$ rman target /

Recovery Manager: Release 11.2.0.1.0 - Production on Sun Oct 11 20:48:05 2015

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database (not started)

RMAN> startup nomount

connected to target database (not started)
Oracle instance started

Total System Global Area     217157632 bytes

Fixed Size                     2211928 bytes
Variable Size                159387560 bytes
Database Buffers              50331648 bytes
Redo Buffers                   5226496 bytes

RMAN> RESTORE SPFILE FROM '/backup/data_PROD1_1rqjff8b_1_1.bak.20151011';

Starting restore at 11-OCT-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK

channel ORA_DISK_1: restoring spfile from AUTOBACKUP /backup/data_PROD1_1rqjff8b_1_1.bak.20151011
channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete
Finished restore at 11-OCT-15

RMAN> shutdown immediate

Oracle instance shut down

RMAN> startup nomount

connected to target database (not started)
Oracle instance started

Total System Global Area     417546240 bytes

Fixed Size                     2213936 bytes
Variable Size                322963408 bytes
Database Buffers              88080384 bytes
Redo Buffers                   4288512 bytes

制御ファイルを復元してマウントする

RMAN> RESTORE CONTROLFILE FROM '/backup/data_PROD1_1rqjff8b_1_1.bak.20151011';

Starting restore at 11-OCT-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/app/oracle/oradata/prod1/control01.ctl
output file name=/u01/app/oracle/oradata/prod1/control02.ctl
output file name=/u01/app/oracle/oradata/prod1/control03.ctl
Finished restore at 11-OCT-15

RMAN> ALTER DATABASE MOUNT;

database mounted
released channel: ORA_DISK_1

バックアップの対象となるファイルを登録。最後にも/をいれるのがコツ。
これをすることでバックアップ後にとったアーカイブログなどもrmanでリカバリの時に自動的に見てくれるようになる。

RMAN> CATALOG START WITH '/backup/' NOPROMPT;

Starting implicit crosscheck backup at 11-OCT-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK
Crosschecked 2 objects
Finished implicit crosscheck backup at 11-OCT-15

Starting implicit crosscheck copy at 11-OCT-15
using channel ORA_DISK_1
Finished implicit crosscheck copy at 11-OCT-15

searching for all files in the recovery area
cataloging files...
no files cataloged

searching for all files that match the pattern /backup/

List of Files Unknown to the Database
=====================================
File Name: /backup/data_PROD1_1rqjff8b_1_1.bak.20151011
File Name: /backup/o1_mf_1_7_c1nlok3j_.arc
File Name: /backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011
File Name: /backup/o1_mf_1_6_c1nlndsd_.arc
File Name: /backup/o1_mf_1_5_c1nln4mr_.arc
cataloging files...
cataloging done

List of Cataloged Files
=======================
File Name: /backup/data_PROD1_1rqjff8b_1_1.bak.20151011
File Name: /backup/o1_mf_1_7_c1nlok3j_.arc
File Name: /backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011
File Name: /backup/o1_mf_1_6_c1nlndsd_.arc
File Name: /backup/o1_mf_1_5_c1nln4mr_.arc

データをリストア/リカバリする

RMAN> RESTORE DATABASE;

RMAN> RECOVER DATABASE;

Starting recover at 11-OCT-15
using channel ORA_DISK_1

starting media recovery

archived log for thread 1 with sequence 5 is already on disk as file /backup/o1_mf_1_5_c1nln4mr_.arc
archived log for thread 1 with sequence 6 is already on disk as file /u01/app/oracle/oradata/prod1/redo03a.log
archived log for thread 1 with sequence 7 is already on disk as file /u01/app/oracle/oradata/prod1/redo01a.log
archived log for thread 1 with sequence 8 is already on disk as file /u01/app/oracle/oradata/prod1/redo02a.log
channel ORA_DISK_1: starting archived log restore to default destination
channel ORA_DISK_1: restoring archived log
archived log thread=1 sequence=4
channel ORA_DISK_1: reading from backup piece /backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011
channel ORA_DISK_1: piece handle=/backup/archivelog_PROD1_1sqjff8e_1_1.bak.20151011 tag=TAG20151011T203526
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:02
archived log file name=/u01/app/oracle/flash_recovery_area/PROD1/archivelog/2015_10_11/o1_mf_1_4_c1nmcg00_.arc thread=1 sequence=4
channel default: deleting archived log(s)
archived log file name=/u01/app/oracle/flash_recovery_area/PROD1/archivelog/2015_10_11/o1_mf_1_4_c1nmcg00_.arc RECID=74 STAMP=892846334
archived log file name=/backup/o1_mf_1_5_c1nln4mr_.arc thread=1 sequence=5
archived log file name=/u01/app/oracle/oradata/prod1/redo03a.log thread=1 sequence=6
archived log file name=/u01/app/oracle/oradata/prod1/redo01a.log thread=1 sequence=7
archived log file name=/u01/app/oracle/oradata/prod1/redo02a.log thread=1 sequence=8
media recovery complete, elapsed time: 00:00:00
Finished recover at 11-OCT-15

※番外編:sequenceの指定してリカバリ
アーカイブログしかなかったり、中途半端なredoログしかなければsequenceを指定してリカバリすることも可能

RMAN> list archivelog all; # これで登録されているアーカイブログの一覧確認
RMAN> run{
set until sequence = 7;
recover database;
}

ちなみに他にも時間での指定とかも出来ます
※番外編ここまで

バックアップの制御ファイルから戻したのでredoログを作りなおしてopenする

RMAN> ALTER DATABASE OPEN RESETLOGS;

database opened

データがきちんと戻っているのを確認する

$ sqlplus / as sysdba
SYS@prod1> select * from dip.hoge;

 ID
----------
  1
  2

これでいざというときになんとか復元できるはずっ!!

mogmet

View Comments

  • Reading your article has greatly helped me, and I agree with you. But I still have some questions. Can you help me? I will pay attention to your answer. thank you.

  • I don't think the title of your article matches the content lol. Just kidding, mainly because I had some doubts after reading the article.

  • Can you be more specific about the content of your article? After reading it, I still have some doubts. Hope you can help me.

Share
Published by
mogmet
Tags: Oracle