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Database backup & recovery


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Slide about Database Backup and Recovery uploaded by Mustafa khan afridi

Slide about Database Backup and Recovery uploaded by Mustafa khan afridi

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  • 1. Database Backup & Security Mustafa khan ID: 3917
  • 2. Introduction to Backup
    • A backup is a copy of data. This copy can include important parts of the database, such as the control file and data files.
    • A backup is a safeguard against unexpected data loss and application errors.
    • If you lose the original data, then you can reconstruct it by using a backup.
  • 3.
    • There are two main types of database backups:
    • Full Backup
    • Incremental Backup
  • 4.
    • Full Backup: A full backup is used to create a copy of all data of entire database. It requires a large amount of storage space.
    • A database can restored relatively quickly using a full backup as it requires to simply copy the backup files.
  • 5.  
  • 6.
    • Incremental Backup: An Incremental backup creates a copy of only the data that have changed since the last backup.
    • The Incremental backup only contains changes made to the database.
    • Incremental database requires small amount of storage space. However it may take more time to restore a database.
  • 7.  
  • 8. A database may be in two different states while performing a backup
    • Offline Backups: An offline backup a backup that is performed after a database has been shut down.
    • The database administrator must schedule a time to shut down the database.
  • 9. Online Backups
    • An online backup is a backup that can be performed while a database is running. The database administrator does not have to shutdown the database.
    • The user do not need to disconnect .
  • 10. Database Security
    • Database security is a process of protecting database from intentional or accidental threats. It includes the security of hardware, software, people and data related to database.
    • The basic purpose of security is to minimize the losses that may occur due to different
    • Security threats.
  • 11.
    • Some important factors related to the security of database are as follows:
    • 1:Theft and Fraud: Theft and fraud affect the database environment as well as entire organization.
    • The security checks must be applied in database environment so no person may commit such activities.
    • 2:Loss of confidentiality: confidentiality is a requirement to keep data secret.
  • 12.
    • 3: Loss of privacy: privacy is a requirement to protect people’s personal data. A problem in privacy may result in legal actions against the organization.
    • 4:Loss of availability: it means that the data or the system may not be accessible.
    • It can result in serious damage to the financial performance of the organization.
  • 13.