This chapter provides a detailed exploration of backup and recovery strategies within a SQL Server environment. We begin by establishing the fundamental importance of backups in safeguarding against data loss, corruption, or damage caused by a range of threats, from hardware failures to cyberattacks. This chapter categorizes the primary types of backups in MS SQL Server, including full, differential, and transaction log backups, which are at the core of any strong recovery plan. Beyond these foundational backups, we will delve into other specialized types, such as tail-log backups, file and filegroup backups, copy-only backups, mirror backups, and compressed backups. The chapter will further explore incremental and differential backups and discuss the benefits of each approach. We will also review the concepts and application of transaction log backups, including the more specialized use of tail-log backups. More advanced backup and recovery strategies, such as file and filegroup backups as well as mirror backups, will be reviewed. Finally, the role of compression in backups will be considered, and special considerations for large environments will be discussed. By the end of this chapter, readers will have a thorough understanding of the various backup options available in SQL Server, along with the strategies and techniques necessary to build a robust and effective data protection and recovery plan for both simple and complex environments.

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Backup and Recovery Strategies

  • Venkata Reddy Pasam,
  • Petchikumar Andiappan

摘要

This chapter provides a detailed exploration of backup and recovery strategies within a SQL Server environment. We begin by establishing the fundamental importance of backups in safeguarding against data loss, corruption, or damage caused by a range of threats, from hardware failures to cyberattacks. This chapter categorizes the primary types of backups in MS SQL Server, including full, differential, and transaction log backups, which are at the core of any strong recovery plan. Beyond these foundational backups, we will delve into other specialized types, such as tail-log backups, file and filegroup backups, copy-only backups, mirror backups, and compressed backups. The chapter will further explore incremental and differential backups and discuss the benefits of each approach. We will also review the concepts and application of transaction log backups, including the more specialized use of tail-log backups. More advanced backup and recovery strategies, such as file and filegroup backups as well as mirror backups, will be reviewed. Finally, the role of compression in backups will be considered, and special considerations for large environments will be discussed. By the end of this chapter, readers will have a thorough understanding of the various backup options available in SQL Server, along with the strategies and techniques necessary to build a robust and effective data protection and recovery plan for both simple and complex environments.