[Oracle] export and import of OCR backup and recovery, oracleocr

[Oracle] export and import of OCR backup and recovery, oracleocr

Back up and restore OCR using exported import:

Before adjusting the cluster, for example, adding or deleting nodes, you should back up OCR once. You can use export to back up to the specified file.

Lab environment:

OS: OEL5.6

RAC: 10.2.0.1.0

(1) Disable CRS for all nodes

Node 1:

[Root @ rac1 crsd] # crsctl stop crs

Stopping resources.

Successfully stopped CRS resources

Stopping CSSD.

Shutting down CSS daemon.

Shutdown request successfully issued.

Node 2:

[Root @ rac2 ~] # Crsctl stop crs

Stopping resources.

Successfully stopped CRS resources

Stopping CSSD.

Shutting down CSS daemon.

Shutdown request successfully issued.

(2) Export the OCR content.

[Root @ rac1 crsd] # cd

[Root @ rac1 ~] # Ocrconfig-export ocrexp. exp

(3) Start CRS

Node 1:

[Root @ rac1 ~] # Crsctl start crs

Attempting to start CRS stack

The CRS stack will be started shortly

Node 2:

[Root @ rac2 ~] # Crsctl start crs

Attempting to start CRS stack

The CRS stack will be started shortly

 

[Root @ rac2 ~] # Crs_stat-t

Name Type Target State Host

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

Ora... B1.inst application ONLINE rac1

Ora... B2.inst application ONLINE rac2

Ora. RACDB. db application ONLINE rac1

Ora... SM1.asm application ONLINE rac1

Ora... C1.lsnr application ONLINE rac1

Ora. rac1.gsd application ONLINE rac1

Ora. rac1.ons application ONLINE rac1

Ora. rac1.vip application ONLINE rac1

Ora... SM2.asm application ONLINE rac2

Ora... C2.lsnr application ONLINE rac2

Ora. rac2.gsd application ONLINE rac2

Ora. rac2.ons application ONLINE rac2

Ora. rac2.vip application ONLINE rac2

(4) Damage content in OCR

[Root @ rac2 ~] # Dd if =/dev/zero of =/dev/raw/raw1 bs = 1024 count = 102400

102400 + 0 records in

102400 + 0 records out

104857600 bytes (105 MB) copied, 41.7897 seconds, 2.5 MB/s

(5) Check the cluster status and OCR consistency:

[Root @ rac2 ~] # Crs_stat-t

CRS-0184: Cannot communicate with the CRS daemon.

[Root @ rac2 ~] # Ocrcheck

PROT-601: Failed to initialize ocrcheck

The cluster has been suspended and the consistency cannot be checked.

(6) use the clufy tool in the Clusterware installation package to check consistency

[Root @ rac1 cluvfy] #./runcluvfy. sh comp ocr-n all

 

Verifying OCR integrity

Unable to retrieve nodelist from Oracle clusterware.

 

Verification cannot proceed.

Check failed.

(7) use import to restore ocr content.

[Root @ rac1 ~] # Ocrconfig-import ocrexp. exp

(8) Check OCR again

[Root @ rac1 ~] # Ocrcheck

Status of Oracle Cluster Registry is as follows:

Version: 2

Total space (kbytes): 104344

Used space (kbytes): 3820

Available space (kbytes): 100524

ID: 1731255225

Device/File Name:/dev/raw/raw1

Device/File integrity check succeeded

 

Device/File not configured

 

Cluster registry integrity check succeeded

(9) Check the cluvfy Tool

[Root @ rac1 cluvfy] #./runcluvfy. sh comp ocr-n all

 

Verifying OCR integrity

 

Checking OCR integrity...

 

Checking the absence of a non-clustered configuration...

All nodes free of non-clustered, local-only deployments.

 

Uniqueness check for OCR device passed.

 

Checking the version of OCR...

OCR of correct Version "2" exists.

 

Checking data integrity of OCR...

Data integrity check for OCR passed.

 

OCR integrity check passed.

 

Verification of OCR integrity was successful.

Check is OK.

(10) Disable CRS

After the OCR is damaged, the CRS has stopped abnormally, but some processes are still alive. If you do not close the CRS first, directly starting the CRS will fail.

Node 1:

[Root @ rac1 crsd] # crsctl stop crs

Stopping resources.

Successfully stopped CRS resources

Stopping CSSD.

Shutting down CSS daemon.

Shutdown request successfully issued.

Node 2:

[Root @ rac2 crsd] # crsctl stop crs

Stopping resources.

Successfully stopped CRS resources

Stopping CSSD.

Shutting down CSS daemon.

Shutdown request successfully issued.

(10) Start CRS

Node 1:

[Root @ rac1 cluvfy] # crsctl start crs

Attempting to start CRS stack

The CRS stack will be started shortly

Node 2:

[Root @ rac2 ~] # Crsctl start crs

Attempting to start CRS stack

The CRS stack will be started shortly

[Root @ rac2 crsd] # crs_stat-t

Name Type Target State Host

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

Ora... B1.inst application ONLINE rac1

Ora... B2.inst application ONLINE rac2

Ora. RACDB. db application ONLINE rac2

Ora... SM1.asm application ONLINE rac1

Ora... C1.lsnr application ONLINE rac1

Ora. rac1.gsd application ONLINE rac1

Ora. rac1.ons application ONLINE rac1

Ora. rac1.vip application ONLINE rac1

Ora... SM2.asm application ONLINE rac2

Ora... C2.lsnr application ONLINE rac2

Ora. rac2.gsd application ONLINE rac2

Ora. rac2.ons application ONLINE rac2

Ora. rac2.vip application ONLINE rac2

[Root @ rac2 crsd] # crsctl check crs

CSS appears healthy

CRS appears healthy

EVM appears healthy

 

Is the export and backup of oracle databases a concept? Does the import/export correspond to recovery and backup?

It can be regarded as a backup, which can be used for data recovery or other analysis or migration purposes.
The exported file can be used for import and recovery. The exported file is a backup recovery method,

How Does oracle back up, restore, and export all tables? How can I use exp scott/tqye2011 @ ANAUFK to export data? My colleague said no data

Export: exp username/password @ databasename file = storage path. dmp full = y
Import: imp username/password @ databasename file = storage path. dmp full = y