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How do I do a consistent backup with Expdp?
Using Data Pump, you can get logical backup of any object that is consistent with the given scn value or time. For this, use the flashback_scn parameter. In the following example, create a table and add two rows.
How does Expdp work in Oracle?
The expdp and impdp clients use the procedures provided in the DBMS_DATAPUMP PL/SQL package to execute export and import commands, using the parameters entered at the command-line. These parameters enable the exporting and importing of data and metadata for a complete database or subsets of a database.
What is consistent y in Expdp?
The exp utility used the CONSISTENT=Y parameter to indicate the export should be consistent to a point in time. By default the expdp utility exports are only consistent on a per table basis. That SCN is then used with the FLASHBACK_SCN parameter.
How do I backup a database in Oracle 12c?
To perform a whole database backup when the database is open:
- Connect RMAN to the target database as described in “Connecting to the Target Database Using RMAN.”
- Ensure that your database is in ARCHIVELOG mode as described in “Enabling Archiving of Redo Log Files.”
What’s the difference between a database dump and a RMAN backup?
A database dump using expdp is a 1-time export of one or more database schemas. It backs up DDL (table structures, views, synonyms, stored procedures, packages, etc), plus data. An RMAN backup is a point-in-time backup of an entire database (for the purposes of this question).
What do you mean by logical backup in expdp?
This is often referred to as a logical backup where physical backup means those performed either via RMAN, operating system commands, or via third party backup and recovery tools. One reason people used logical backup was historically for ease of recovery for when an object was accidentally dropped.
How does data pump export work in Oracle expdp?
The DBA could either export just the tables that developer needs for that programming task, or better yet, the DBA could permit and instruct the developer to export the tables being worked upon. Either way, the data pump export job would work in table mode and for the tables requested, as shown here.
Which is the best backup strategy for Oracle?
For the Oracle suggested backup strategy described in this documentation, you use operation system authentication. Consult your operating system documentation for instructions for creating host users and adding them to the OSBACKUPDBA group. In previous releases, you needed the SYSDBA administrative privilege to perform backup and recovery tasks.