Home Database Oracle What are the methods of oracle database data backup?

What are the methods of oracle database data backup?

Apr 19, 2024 am 02:30 AM
oracle data lost

Oracle database data backup can be achieved through the following methods: Physical backup: full cold, incremental cold, archive log Logical backup: export/import, RMAN backup/restore Block-based backup: backup set, block change tracking

What are the methods of oracle database data backup?

Oracle database data backup method

In order to ensure the security of Oracle database data and avoid data loss, there are Regular backups are necessary. Oracle provides a variety of backup methods to meet various needs and environments.

Physical Backup

A physical backup creates an actual file copy of the database, including data files, redo log files, and control files.

  • Full Cold Backup: Executed when the database is shut down, backing up all data files and redo log files.
  • Incremental Cold Backup: Performed when the database is shut down, backing up changes since the last cold backup.
  • Archive Log Backup: Back up online redo logs, which record all transactions since the last backup.

Logical Backup

Logical backup exports the logical structure and data of the database so that a copy of the database can be created from it.

  • Export/Import(Export/Import): Export database objects (tables, views, stored procedures, etc.) to a file, and then import from the file to recreate the database .
  • RMAN Backup/Restore: Use Oracle Recovery Manager (RMAN) to create a logical backup that can be restored to the same database or a new database.

Block-based backup

Block-based backup creates a copy of the database blocks, which is much faster than backing up the entire file.

  • Backup Set: Group database blocks into backup sets to achieve incremental backup and fast recovery.
  • Block Change Tracking: Tracks database blocks that have changed since the last backup and only backs up these changed blocks.

Choose the appropriate backup method

Choosing the best backup method depends on the size of the database, activity level, recovery time objective (RTO) and recovery points Objective(RPO). For large databases or databases that are updated frequently, block-based backups may be a good choice. For smaller databases or databases that are updated infrequently, a physical or logical backup may be sufficient.

The above is the detailed content of What are the methods of oracle database data backup?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How long will Oracle database logs be kept? How long will Oracle database logs be kept? May 10, 2024 am 03:27 AM

The retention period of Oracle database logs depends on the log type and configuration, including: Redo logs: determined by the maximum size configured with the "LOG_ARCHIVE_DEST" parameter. Archived redo logs: Determined by the maximum size configured by the "DB_RECOVERY_FILE_DEST_SIZE" parameter. Online redo logs: not archived, lost when the database is restarted, and the retention period is consistent with the instance running time. Audit log: Configured by the "AUDIT_TRAIL" parameter, retained for 30 days by default.

The order of the oracle database startup steps is The order of the oracle database startup steps is May 10, 2024 am 01:48 AM

The Oracle database startup sequence is: 1. Check the preconditions; 2. Start the listener; 3. Start the database instance; 4. Wait for the database to open; 5. Connect to the database; 6. Verify the database status; 7. Enable the service (if necessary ); 8. Test the connection.

How much memory does oracle require? How much memory does oracle require? May 10, 2024 am 04:12 AM

The amount of memory required by Oracle depends on database size, activity level, and required performance level: for storing data buffers, index buffers, executing SQL statements, and managing the data dictionary cache. The exact amount is affected by database size, activity level, and required performance level. Best practices include setting the appropriate SGA size, sizing SGA components, using AMM, and monitoring memory usage.

Oracle database server hardware configuration requirements Oracle database server hardware configuration requirements May 10, 2024 am 04:00 AM

Oracle database server hardware configuration requirements: Processor: multi-core, with a main frequency of at least 2.5 GHz. For large databases, 32 cores or more are recommended. Memory: At least 8GB for small databases, 16-64GB for medium sizes, up to 512GB or more for large databases or heavy workloads. Storage: SSD or NVMe disks, RAID arrays for redundancy and performance. Network: High-speed network (10GbE or higher), dedicated network card, low-latency network. Others: Stable power supply, redundant components, compatible operating system and software, heat dissipation and cooling system.

Oracle scheduled tasks execute the creation step once a day Oracle scheduled tasks execute the creation step once a day May 10, 2024 am 03:03 AM

To create a scheduled task in Oracle that executes once a day, you need to perform the following three steps: Create a job. Add a subjob to the job and set its schedule expression to "INTERVAL 1 DAY". Enable the job.

How much memory is needed to use oracle database How much memory is needed to use oracle database May 10, 2024 am 03:42 AM

The amount of memory required for an Oracle database depends on the database size, workload type, and number of concurrent users. General recommendations: Small databases: 16-32 GB, Medium databases: 32-64 GB, Large databases: 64 GB or more. Other factors to consider include database version, memory optimization options, virtualization, and best practices (monitor memory usage, adjust allocations).

How much memory does an oracle database require? How much memory does an oracle database require? May 10, 2024 am 02:09 AM

Oracle Database memory requirements depend on the following factors: database size, number of active users, concurrent queries, enabled features, and system hardware configuration. Steps in determining memory requirements include determining database size, estimating the number of active users, understanding concurrent queries, considering enabled features, and examining system hardware configuration.

How to start the listening program in oracle How to start the listening program in oracle May 10, 2024 am 03:12 AM

Oracle listeners are used to manage client connection requests. Startup steps include: Log in to the Oracle instance. Find the listener configuration. Use the lsnrctl start command to start the listener. Use the lsnrctl status command to verify startup.

See all articles