Computer Science homework help

Computer Science homework help

8.  A script to create a small table with 3 rows for recovery testing.

CREATE TABLE LOG (

Id int primary key not null,

UserID int,

TimeStamp DateTime

)

Insert into LOG (1,1,2019-07-13 10:00:01)

Insert into LOG (2,4,2019-07-13 09:20:01)

Insert into LOG (3,5,2019-07-13 08:50:01)

9.  Backup and recovery commands for Recovery testing using export/import and RMAN utilities.

rman

RMAN> OnlineShopping

RMAN> register database

RMAN> RESYNC OnlineShopping;

10.  Design and backup/recovery commands for your test.

RMAN> backup database;

 

Starting backup at 12-JUL-19

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

 

channel ORA_DISK_1: SID=198 device type=DISK

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=D:\APP1\SUNTYADA\ORADATA\ORCL\SYSTEM01.DBF

input datafile file number=00002 name=D:\APP1\SUNTYADA\ORADATA\ORCL\SYSAUX01.DBF

input datafile file number=00005 name=D:\APP1\SUNTYADA\ORADATA\ORCL\EXAMPLE01.DBF

input datafile file number=00003 name=D:\APP1\SUNTYADA\ORADATA\ORCL\UNDOTBS01.DBF

input datafile file number=00004 name=D:\APP1\SUNTYADA\ORADATA\ORCL\USERS01.DBF

 

channel ORA_DISK_1: starting piece 1 at 12-JUL-19

channel ORA_DISK_1: finished piece 1 at 12-JUL-19

 

piece handle=D:\APP1\SUNTYADA\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2014_10_05\O1_MF_NNNDF_TAG20191005T162412_B328TXQG_.BKP tag=TAG20141005T162412 comment=NONE

 

channel ORA_DISK_1: backup set complete, elapsed time: 00:04:27

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 12-JUL-19

channel ORA_DISK_1: finished piece 1 at 12-JUL-19

 

piece handle=D:\APP1\SUNTYADA\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2019_07_12\O1_MF_NCSNF_TAG20191005T162412_B3293806_.BKP tag=TAG20191005T162412 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04

 

Finished backup at 12-JUL-19

Restore:

Starting restore at 12-JUL-19

using channel ORA_DISK_1

 

List of Backup Sets

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

BS Key Type LV Size       Device Type Elapsed Time Completion Time

——- —- — ———- ———– ———— —————

4       Full   1.39G     DISK       00:04:23     12-JUL-19

BP Key: 4   Status: AVAILABLE Compressed: NO Tag: TAG20191005T162412

Piece Name: D:\APP1\SUNTYADA\FLASH_RECOVERY_AREA\ORCL\BACKUPSET\2019_07_12\O1_MF_NNNDF_TAG20191005T162412_B328TXQG_.BKP

List of Datafiles in backup set 4

File LV Type Ckp SCN   Ckp Time Name

—- — —- ———- ——— —-

1       Full 9684060   12-JUL-19 D:\APP1\SUNTYADA\ORADATA\ORCL\SYSTEM01.DBF

2       Full 9684060   12-JUL-19 D:\APP1\SUNTYADA\ORADATA\ORCL\SYSAUX01.DBF

3       Full 9684060   12-JUL-19 D:\APP1\SUNTYADA\ORADATA\ORCL\UNDOTBS01.DBF

4       Full 9684060   12-JUL-19 D:\APP1\SUNTYADA\ORADATA\ORCL\USERS01.DBF

5       Full 9684060   12-JUL-19 D:\APP1\SUNTYADA\ORADATA\ORCL\EXAMPLE01.DBF

 

List of Archived Log Copies for database with db_unique_name ORCL

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

Key     Thrd Seq     S Low Time

——- —- ——- – ———

367     1   366     A 02-OCT-14

Name: D:\APP1\SUNTYADA\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2019_07_12\O1_MF_1_366_B32925TJ_.ARC

Media recovery start SCN is 9684060

Recovery must be done beyond SCN 9704654 to clear datafile fuzziness

 

Finished restore at 12-JUL-19

 

11.  Include explanations for what happened during the recovery when import vs. RMAN was used.

RMAN and export both used to backup tables, both commands supports the flashback database but some difference is

· Data Pump Export (expdp) – The export utility is a “logical” backup, usually done by specifying table names which need to be backed up.

· Recovery manager (rman) – RMAN is designed for backup and recovery, it takes the backup of full database.

Rman is more preferable in my opinion for the database.

12.  Flashback recovery commands.

· sqlplus ‘/ as sysdba’

· SQL> alter system set db_recovery_file_dest=’+<FRA Diskgroup>’ SCOPE=spfile;

· SQL> alter system set db_recovery_file_dest_size=100G SCOPE=spfile;

· sqlplus ‘/ as sysdba’

· SQL> shutdown immediate;

· SQL> startup mount;

· If flashback to any previous point in time is required, then turn flashback on using the following command

· SQL> alter database flashback on;

· SQL> alter database open;

· SQL> alter system set db_flashback_retention_target=2880;

· sqlplus ‘/ as sysdba’

· SQL> select name, time,guarantee_flashback_databse from v$restore_point;

· SQL> quit

 

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