RMANwithDG Final

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Upcoming: Using RMAN in a Data Guard Environment


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Oracle Advisor Webcast

Using RMAN in a Data Guard

Environment Debbie Smedley

Senior Principal Technical Support Engineer


AGENDA

Presentation approximately 45 minutes

Q&A Session approximately 15 minutes

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assisted)



Current schedule

Archived recordings

Doc ID 740966.1


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The following is intended to outline our general product

direction. It is intended for information purposes only, and

may not be incorporated into any contract. It is not a

commitment to deliver any material, code, or functionality,

and should not be relied upon in making purchasing decision.

The development, release, and timing of any features or

functionality described for Oracles products remains at the

sole discretion of Oracle.

Safe Harbor Statement

Oracle Advisor Webcast

Using RMAN in a Data Guard

Environment Debbie Smedley

Senior Principal Technical Support Engineer


Objectives

To understand

Archivelog Deletion Policy

Recovery Catalog Usage with DG

Procedure to rollforward

a standby using Incremental Backup


Agenda


Troubleshooting RMAN-08137

RMAN CATALOG and db_unique_name

Standby Rollforward using Incremental Backup

Physical Schema Considerations

Process Flow

Demo


Archive Log Deletion

Only logs in FRA can be automatically deleted

Default deletion under space pressure if

archivelog has been backed up

OR

archivelog is obsolete per RMAN Retention Policy

Use of FRA for archivelogs needs an RMAN Retention Policy

Retention policy needs RMAN Database Backup


Archive Log Deletion Policy 10G

Non-FRA Archivelogs must be explicitly deleted

Ignored by all delete mechanisms

Values:

APPLIED ON STANDBY | NONE | CLEAR

RMAN>backup archivelog ....DELETE INPUT;

RMAN>DELETE archivelog....;

RMAN>DELETE obsolete;


How to set Archive Log Deletion Policy in 10G

Primary Standby where

RMAN is used

Standby where no

RMAN is used

APPLIED ON STANDBY

_log_deletion_policy =ALL (331924.1 )

NONE APPLIED ON STANDBY

(331924.1 )


Archive Log Deletion Policy 11G

Non-FRA Archivelogs must be explicitly deleted

Respected by all delete mechanisms

Values

APPLIED ON [ALL] STANDBY

SHIPPED TO [ALL] STANDBY

BACKED UP integer TIMES TO DEVICE TYPE

NONE


How to set Archive Log Deletion Policy in 11G

Primary Standby where

RMAN is used

Standby where no

RMAN is used

SHIPPED TO [ALL] STANDBY


BACKED UP N TIMES TO DEVICE

TYPE



RMAN-08137

Log is needed by Data Guard

Log is needed by Streams/Golden Gate

Log is needed by Guaranteed Restore Point

RMAN-08137: WARNING: archived log not deleted as it is still needed

RMAN-08120: WARNING: archived log not deleted, not yet applied by

standby



Data Guard

Logs that have not shipped will not appear in the output

SQL>select sequence#, archived, applied from v$archived_log where

dest_id=2 and status = 'A' and sequence# > ;

SEQUENCE# ARC APPLIED

---------- --- ---------

38 YES NO

37 YES NO

36 YES NO

39 YES NO

40 YES NO

41 YES NO



Restore Points

SQL> select scn, database_incarnation# inc,

guarantee_flashback_database, name from v$restore_point;

SCN INC GUA NAME

---------- --- --- ---------------

8195754 3 YES RERUNDEMO

SQL> select thread#, sequence# from v$archived_log where 8195754

between first_change# and next_change#;

THREAD# SEQUENCE#

---------- ----------

1 42

SQL>drop restore point RERUNDEMO;



Streams 10G

290143.1: Minimum Archived Log Necessary to Restart 10g and 11g Streams

Capture Process

Streams 11G

Alternatively

SQL>select min(required_checkpoint_scn)from dba_capture ;

SQL>select min_required_capture_change#from v$database ;

RMAN>delete noprompt force archivelog all completed before '';



Upload to Oracle Support Services:

rman.log/rman.trc

Spfile/init.ora

Alert log

%export NLS_DATE_FORMAT= 'dd-mon-YY hh24:mi:ss'

%rman target / log rman.log trace rman.trc debug

RMAN>show all;

RMAN>delete


RMAN 11G Use of Catalog with Data Guard

Primary

RMAN> list backup summary completed after 'sysdate -1';

List of Backups

===============

Key TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag

----- -- -- - ----------- ------------------ ------- ------- ---------- ---

962 B F A DISK 09-jun-13 18:02:37 1 1 NO FULL_PRIMARY



RMAN 11G Use of Catalog with Data Guard

RMAN> set backup files for device type disk to accessible;

RMAN> list backup summary completed after 'sysdate -1';

List of Backups

===============

Key TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag

----- -- -- - ----------- ------------------ ------- ------- ---------- ---



1408 B F A DISK 09-jun-13 18:08:01 1 1 NO FULL_STANDBY

1409 B F A DISK 09-jun-13 18:09:02 1 1 NO FULL_STANDBY

RMAN>set backup files for device type disk to notaccessible; (11.2)

RMAN>set backup files for device type disk to inaccessible; (11.1)


Standby Rollforward using Incremental Backup

Standby is far behind Primary

Excessive number of archivelogs to be applied

Required archivelogs no longer available

Wide spread corruption on Standby (nologging)

Flashback database first

Advantages

Much faster than redo apply

No archivelogs to be applied

LOGICAL corruptions from nologging updates avoided


Considerations

Changes to the physical schema

Files added to primary?

Files or tablespaces dropped from Primary?

New tablespaces transported into Primary?

Different naming conventions

DB_FILE_NAME_CONVERT

LOG_FIlE_NAME_CONVERT


Process Flow

Determine lowest file

checkpoint

Determine physical

schema changes

RMAN>backup

incremental from scn

database;

RMAN>backup

datafile 7, 8;

RMAN>backup

current controlfile for

standby;

RMAN>restore

standby controflile;

RMAN>restore

datafile 7,8;

Rename files

RMAN>recover

database noredo;

S

T

A

N

D

B

Y

P

R

I

M

A

R

Y Transfer backups


Primary Backup

In order of preference:

1. NFS location /Tape

2. Local directory common to both eg /tmp

3. Local directory common to Primary only

RMAN is not host aware

Standby can see backup if:

Catalog is used

Path/filename does not change on standby host


Demonstration


Summary



Using a catalog with Data Guard

Rollforward of a Standby database

using an incremental backup

What we covered today


Questions & Answers


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Further Info & Help

Generic Advisor Webcast Note (Doc ID 740966.1) Database Advisor Webcast (Doc ID 1456176.1) DB Newsletter (Doc ID 1284265.1) MOS Community Database Backup and Recovery



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RMANwithDG Final