Which three scenarios is media recovery required?

Recovering After the Loss of Online Redo Log Files. Recovering After the Loss of Archived Redo Log Files. Recovering After the Loss of Control Files. Recovering from User Errors.

What is instance recovery in Oracle 11g?

Instance recovery refers to the case where a surviving instance recovers a failed instance in an Oracle Real Application Clusters database. The goal of crash and instance recovery is to restore the data block changes located in the cache of the dead instance and to close the redo thread that was left open.

How do I backup an entire database in Oracle 11g?

Backing Up the Database

1. On Windows: Click Start, point to Programs (or All Programs), point to Oracle Database 11g Express Edition, and then select Backup Database.
2. On Linux with Gnome: In the Applications menu, point to Oracle Database 11g Express Edition, and then select Backup Database.

What are the different types of backup in Oracle?

There are two types of backups: image copies and backup sets. An image copy is an exact duplicate of a datafile, control file, or archived log….You can make backups of archived logs by using the following methods:

• The RMAN BACKUP ARCHIVELOG command.
• The RMAN BACKUP PLUS ARCHIVELOG command.
• An operating system utility.

What is media failure in Oracle?

Media Failure. An error can occur when trying to write or read an file on disk that is required to operate an Oracle database. This occurrence is called media failure because there is a physical problem reading or writing to files on the storage medium.

What are the types of recovery?

There are three basic types of recovery: instance recovery, crash recovery, and media recovery.

What are the types of instance recovery?

This chapter discusses three types of recovery: Recovery from Instance Failure. Recovery from Media Failure. Parallel Recovery.

What is database backup and recovery?

Backup and recovery describes the process of creating and storing copies of data that can be used to protect organizations against data loss. This is sometimes referred to as operational recovery.

What is full backup in Oracle?

A full backup is an operating system backup of all datafiles and the control file that constitute an Oracle database. A full backup should also include the parameter file(s) associated with the database. You can take a full database backup when the database is shut down or while the database is open.

What is difference between restore and backup?

So, when we’re talking about cloud backup and restore solutions, you might say backup is what goes up to the cloud, and restore is what comes back down. Even if you’re performing backups manually, it’s a directional thing—backups are outgoing data, while the restore is about incoming data.

What is crash recovery?

Crash recovery is the process by which the database is moved back to a consistent and usable state. This is done by rolling back incomplete transactions and completing committed transactions that were still in memory when the crash occurred (Figure 1).

What are the 3 types of recovery?

Coffey et al. (2004) investigated the effects of three recovery interventions (active, low-intensity exercise; passive, seated rest; and CWT) on repeated treadmill running performance separated by 4 h.

Which background process does instance recovery?

SMON background process
The SMON background process performs instance recovery, and applies the changes from the redo logs (rolls forward all the changes). In the first phase of the instance recovery, all the changes from the redo logs are applied by SMON.

Why backup and recovery is important?

Simple user error can cause critical data loss. Natural disasters such as hurricanes, floods, or fires can also disrupt power and damage data. Every business needs a solid data backup and system recovery solution that can help it survive—or even thrive—in the face of unexpected events.

How to perform oracle backup and recovery?

There are two ways to perform Oracle backup and recovery: Recovery Manager and user-managed backup and recovery. Recovery Manager (RMAN) is an Oracle utility that can back up, restore, and recover database files. It is a feature of the Oracle database server and does not require separate installation.

What is the oracle-suggested backup strategy?

The Oracle-suggested backup strategy is based on creating an image copy of your database which is rolled forward using RMAN incremental backups. Oracle Enterprise Manager schedules RMAN backups jobs.

How do I create a backup schedule in Oracle Enterprise Manager?

The Oracle-suggested backup strategy is based on creating an image copy of your database which is rolled forward using RMAN incremental backups. Oracle Enterprise Manager schedules RMAN backups jobs. Follow the steps below to set up your backup schedule: 1. Click the Availability tab. Select Schedule Backup in the Manage region. 2.

How does oracle advised recovery work?

Performing Oracle Advised Recovery The Oracle advised recovery feature uses Data Recovery Advisor, which is an Oracle Database feature that automatically diagnoses data failures, determines and presents appropriate repair options, and performs repairs if requested by the user.