Performing database backup and recovery with vss

VSS is an infrastructure on Windows server platforms that enables applications to create shadow copies. Database 12c new features A shadow copy is a consistent snapshot of the data held on a volume or component at a well-defined point in time. Database lyrics A shadow copy set is a collection of shadow copies that are all taken at the same time. Database 360 VSS identifies each shadow copy and shadow copy set by a persistent Global Unique Identifier (GUID).


A VSS requester is an application that requests VSS services to create shadow copies. Database architect salary Typically, VSS requesters are backup applications. Database administrator job description Requesters communicate with writers to gather system data and signal writers to prepare data for backup.

A VSS provider manages storage volumes and creates shadow copies on demand. Data recovery app In response to a requester, a provider generates COM events to signal applications of an impending shadow copy and creates and maintains this copy until it is no longer needed. R database connection During the life cycle of the shadow copy, the provider effectively supports two independent copies: the disk that is actively updated and a fixed copy that is stable for backup.

A VSS writer is an application or service that writes data to disk and cooperates with VSS providers and requesters. Database weak entity During backups, writers ensure that data is in the proper state for a shadow copy.

The Oracle VSS writer is a Windows service that coordinates an Oracle database instance and other VSS components. Data recovery vancouver The writer service, which is started under the user account with SYSDBA privileges, runs separately from the database instance. Level 3 data recovery You must use third-party requesters to perform backup and recovery within the VSS infrastructure.

As explained in the following sections, the Oracle VSS writer supports both volume-based and component-based shadow copies. Database blob You can use these shadow copies in a backup and recovery strategy or to create a copy of your original database. Database examples You can use the duplicate database for testing or as a standby database.

Contains the snapshot location of the control file for a database running in ARCHIVELOG mode, or the current control file locations when all database files are recovered to a consistent SCN.

Note: The files included in the Control File component determine whether current control files or snapshot control files are excluded. Database knowledge For example, if the database is opened in read-only mode, then the snapshot control file location is excluded from the snapshot.

You can select only Oracle Database, ArchiveLogDest_ n, and Fast Recovery Area, exposed by the Oracle VSS writer during a backup. H2 database The availability of the components in Table 8-2 may depend on the database state. Nexus 5 data recovery For example, if the database is in NOARCHIVELOG mode, the Archived Logs component will not be returned. Data recovery uk Likewise, if the instance is not started with a server parameter file, the Server Parameter File component will not be returned.

To make volume-based shadow copies of Oracle database when the database is open in read/write mode, the archived redo logs must be physically located on a separate volume from the volume containing the oracle datafiles, control files, server parameter file, and online redo logs.

Oracle VSS writer includes the server parameter file, control file, and datafiles in the snapshot. Database collation The online redo logs will not be included in the snapshot. Database yugioh Note that you can restore the server parameter file individually, but the control files and datafiles must be always restored together.

Use a third-party VSS requester to select the volumes where all of the archived redo logs (or the fast recovery area) are physically located.

Ensures that the database is started NOMOUNT. Top 10 data recovery software free If the server parameter file is restored to the default location for the Oracle home, then the instance starts NOMOUNT automatically. Data recovery vancouver bc Otherwise, you must set ORA_ SID _PFILE to the location of the text-based initialization parameter file that points to the location of the server parameter file.

Verifies that the instance is either started NOMOUNT or not started. 7 data recovery suite crack If the instance is not started, the writer either starts the instance with the ORA_ SID _PFILE instance parameter file, or uses the initialization parameter file or server parameter file in the default location.

Extracts redo from the backup writer metadata document and performs incomplete recovery on all the restored datafiles up to the time of snapshot creation. Database normalization definition The requester application can override the default recovery behavior.

Starts the database instance, mounts the control file, and performs recovery. Data recovery wizard See the descriptions of post-restore behavior for Server Parameter File, Control File, and All Tablespaces.

The writer control commands are applicable to all the restored components during the postrestore phase. Data recovery video The format is as follows: OP1=CMD1, OP2=CMD2, . . Database query example .

This command instructs the writer to not perform any post-restore recovery activities defined in the default post-restore recovery operations for the restored component. Database migration Otherwise, the post-restore phase default actions are performed.

This command instructs the writer to run specific SQL commands in OnPrepareBackup or OnPreRestore callback, before performing any other validations. Data recovery free The command is used to stop MRP on a standby database before VSS snapshot is created or to shut down database instance creating a cold backup of the database.

This command instructs the writer to run specific SQL commands in PostSnapshot or PostRestore callback. Database vs spreadsheet This command is used to restart MRP on standby database after VSS snapshot is created or to restart the database instance after the cold backup of the database is performed.

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