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How to back up data in oracle database

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Release: 2024-04-07 16:54:24
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How to back up data in Oracle database

1. RMAN backup

Recovery Manager (RMAN) is a built-in backup tool provided by Oracle. Here are the steps to back up data using RMAN:

  • Connect to the Oracle database.
  • Create a backup set.
  • Add the data files or table spaces to be backed up.
  • Perform backup operation.

2. EXP/IMP Export and Import

EXP and IMP utilities are used to export and import data. Here are the steps:

  • Export the data using the EXP utility.
  • Use the IMP utility to import the exported data.

3. Database replication

Database replication creates a copy of the database and keeps the copy synchronized with the source database. Here are the steps:

  • Create the database on the target server.
  • Configure replication on the source database.
  • Configure replication on the target database.

4. Data Pump Export and Import

Data Pump is a backup and recovery tool introduced in Oracle 10g. Here are the steps:

  • Export data on the source database.
  • Import the exported data on the target database.

5. Logical backup

Logical backup creates data structures and textual representations of the data. Here are the steps:

  • Get the DDL for tables and indexes using the DBMS_METADATA.GET_DDL package.
  • Use the DBMS_METADATA.GET_DATA package to retrieve data.

Choose the appropriate backup method

Choosing the appropriate backup method depends on database size, performance requirements, and availability needs. Here are some guidelines:

  • #RMAN:Suitable for full backup and recovery of large databases.
  • EXP/IMP:Suitable for logical backup and recovery of small to medium-sized databases.
  • Database Replication:Suitable for business-critical applications that require high availability.
  • Data Pump:Provides faster backup and recovery than RMAN, but the functionality may be more limited.
  • Logical backup:Suitable for situations where data structures and data text representations need to be created.

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