<Insert Picture Here> RMAN Full Backups zum Preis von inkrementellen Backups

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2 <Insert Picture Here> RMAN Full Backups zum Preis von inkrementellen Backups Ralf Lange Leitender Systemberater

3 RMAN Full Backups zum Preis von inkrementellen Backups Einführung RMAN Vollständige und inkrementelle Backups Aktualisierung von vollständigen Backups Block Change Tracking File Beispiel: Bereithalten eines vollständigen Backups mit dem Stand der Datenbank von vor drei Tagen

4 RMAN Einführung Wer von Ihnen verwendet RMAN?

5 RMAN Einführung Wer von Ihnen verwendet RMAN? Wer von Ihnen findet RMAN sperrig?

6 RMAN Einführung Wer von Ihnen verwendet RMAN? Wer von Ihnen findet RMAN sperrig? Wer von Ihnen verwendet inkrementelle Backups?

7 RMAN Einführung Keine Angst vor RMAN rman target / Recovery Manager: Release Production on Sun Nov 30 04:28: Copyright (c) 1982, 2007, Oracle. All rights reserved. connected to target database: ORCL (DBID= ) RMAN> backup database; Starting backup at 30-NOV-08 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1... handle=+fra/orcl/backupset/2008_11_30/nnndf0_tag t042917_ tag=tag t comment=none channel ORA_DISK_1: backup set complete, elapsed time: 00:02:26 Finished backup at 30-NOV-08 RMAN>

8 RMAN Einführung Keine Angst vor RMAN Linux Tip: readline wrapper rlwrap rman target / Recovery Manager: Release Production on Sun Nov 30 04:28: Copyright (c) 1982, 2007, Oracle. All rights reserved. connected to target database: ORCL (DBID= ) RMAN> backup database; Starting backup at 30-NOV-08 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1... handle=+fra/orcl/backupset/2008_11_30/nnndf0_tag t042917_ tag=tag t comment=none channel ORA_DISK_1: backup set complete, elapsed time: 00:02:26 Finished backup at 30-NOV-08 RMAN>

9 RMAN Einführung Keine Angst vor RMAN RMAN> restore database; Starting restore at 30-NOV-08 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=534 device type=disk allocated channel: ORA_SBT_TAPE_1... channel ORA_DISK_1: restoring datafile Finished restore at 30-NOV-08 RMAN> recover database; Starting recover at 30-NOV-08 channel ORA_DISK_1: restored backup piece 1 channel ORA_DISK_1: restore complete, elapsed time: 00:00:26 starting media recovery media recovery complete, elapsed time: 00:00:03... Finished recover at 30-NOV-08 RMAN> sql 'alter database open'; sql statement: alter database open RMAN>

10 RMAN Einführung Backupset: Ein RMAN eigenes Format Image Copy: 1:1 Kopie von Files

11 RMAN Einführung Backupset: Ein RMAN eigenes Format Image Copy: 1:1 Kopie von Files backup database; X

12 RMAN Einführung Backupset: Ein RMAN eigenes Format Image Copy: 1:1 Kopie von Files backup database; backup as copy database; X X

13 RMAN Einführung Backupset: Ein RMAN eigenes Format Image Copy: 1:1 Kopie von Files backup database; backup as copy database; backup incremental level 1 database; X X X

14 RMAN Einführung Backupset: Ein RMAN eigenes Format Image Copy: 1:1 Kopie von Files backup database; backup as copy database; backup incremental level 1 database; backup incremental level 1 for recover of copy database tag basis backup ; X X X X

15 <Insert Picture Here> Vollständige Inkrementelle Backups

16 Backup vollständiges Backup: Backupset, Image Copy Full Backup (Image Copy) Datenbank Full Backup (Backupset) leerer Datenblock Datenblock

17 Backup inkrementelles Backup basis backup Datenbank 1 leerer Datenblock Datenblock seit letztem inkrementellen Backup verändert

18 Backup inkrementelles Backup basis backup Datenbank Level 1 Backup 1 2 leerer Datenblock Datenblock seit letztem inkrementellen Backup verändert

19 Backup incrementally updated Backups 1 Datenbank basis backup backup incremental level 1 for recover of copy database tag basis backup ; leerer Datenblock Datenblock seit letztem inkrementellen Backup verändert

20 Backup incrementally updated Backups 2 basis backup Datenbank Level 1 Backup backup incremental level 1 for recover of copy with tag basis backup database tag daily incr ; leerer Datenblock Datenblock seit letztem inkrementellen Backup verändert

21 Backup incrementally updated Backups 3 basis backup Datenbank Level 1 Backup recover copy of database with tag basis backup ; leerer Datenblock Datenblock seit letztem inkrementellen Backup verändert

37 Block Change Tracking <Insert Picture Here>

38 Block Change Tracking File You are leaving the Standard Edition Sector! RMAN liest für inkrementelle Backups alle Datafiles bis zur High Water Mark. Also praktisch die gesamte Datenbank. Ist Block Change Tracking eingeschaltet, liest RMAN nur das Block Change Tracking File und die geänderten Blöcke.

39 Block Change Tracking File You are leaving the Standard Edition Sector! alter database enable block change tracking [using file '...']; alter database disable block change tracking; # move block change tracking file # db must be in mount mode alter database rename file '...' to '...'; select filename, status, bytes from v$block_change_tracking;

40 Block Change Tracking File You are leaving the Standard Edition Sector! SQL> select file#, avg(datafile_blocks), avg(blocks_read), avg(blocks), avg(blocks_read/datafile_blocks)*100 as pct_read_for_backup from v$backup_datafile where used_change_tracking = 'YES' and incremental_level > 0 group by file#; FILE# AVG(DATAFILE_BLOCKS) AVG(BLOCKS_READ) AVG(BLOCKS) PCT_READ_FOR_BACKUP , , , , , , ,34375

41 Beispiel: Bereithalten eines vollständigen Backups mit dem Stand der Datenbank von vor drei Tagen <Insert Picture Here>

42 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup Vorbereitung: Initialer Full Backup backup incremental level 1 for recover of copy database tag basis backup ;

43 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup Vorbereitung: Initialer Full Backup backup incremental level 1 for recover of copy database tag basis backup ; Danach jeden Tag: run { backup incremental level 1 for recover of copy with tag basis backup database tag daily incremental ; recover copy of database with tag basis backup until time sysdate-3 ; backup as compressed backupset archivelog all not backed up delete all input; delete noprompt obsolete; }

44 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup backup incremental level 1 for recover of copy database tag basis backup ; Full Backup Sonntag Montag Dienstag Mittwoch Donnerstag t

45 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup backup incremental level 1 for recover of copy with tag basis backup database tag daily incremental ; recover copy of database with tag basis backup until time sysdate-3 ; Full Backup Stand: Sonntag Level 1 Sonntag Montag Dienstag Mittwoch Donnerstag t

46 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup backup incremental level 1 for recover of copy with tag basis backup database tag daily incremental ; recover copy of database with tag basis backup until time sysdate-3 ; Full Backup Stand: Sonntag Level 1 Level 1 Sonntag Montag Dienstag Mittwoch Donnerstag t

47 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup backup incremental level 1 for recover of copy with tag basis backup database tag daily incremental ; recover copy of database with tag basis backup until time sysdate-3 ; Full Backup Stand: Sonntag Level 1 Level 1 Level 1 Sonntag Montag Dienstag Mittwoch Donnerstag t

48 Beispiel einer Backup Strategie Bereithalten eines 3 Tage alten Full Backup backup incremental level 1 for recover of copy with tag basis backup database tag daily incremental ; recover copy of database with tag basis backup until time sysdate-3 ; Full Backup Stand: Montag Level 1 Level 1 Level 1 Level 1 Sonntag Montag Dienstag Mittwoch Donnerstag t

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