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Clase Backup

The Backup object provides programmatic access to Microsoft SQL Server backup operations.

Jerarquía de herencia

System. . :: . .Object
  Microsoft.SqlServer.Management.Smo. . :: . .BackupRestoreBase
    Microsoft.SqlServer.Management.Smo..::..Backup

Espacio de nombres:  Microsoft.SqlServer.Management.Smo
Ensamblado:  Microsoft.SqlServer.SmoExtended (en Microsoft.SqlServer.SmoExtended.dll)

Sintaxis

'Declaración
Public NotInheritable Class Backup _
    Inherits BackupRestoreBase
'Uso
Dim instance As Backup
public sealed class Backup : BackupRestoreBase
public ref class Backup sealed : public BackupRestoreBase
[<SealedAttribute>]
type Backup =  
    class
        inherit BackupRestoreBase
    end
public final class Backup extends BackupRestoreBase

El tipo Backup expone los siguientes miembros.

Constructores

  Nombre Descripción
Método público Backup Initializes a new instance of the Backup class.

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Propiedades

  Nombre Descripción
Propiedad pública Action Gets or sets the type of backup to be performed.
Propiedad pública AsyncStatus Gets the asynchronous status of a backup or restore process. (Se hereda de BackupRestoreBase.)
Propiedad pública BackupSetDescription Gets or sets a textual description for a particular backup set.
Propiedad pública BackupSetName Gets or sets the name used to identify a particular backup set.
Propiedad pública BlockSize Gets or sets the physical block size of the backup or restore, in bytes. (Se hereda de BackupRestoreBase.)
Propiedad pública BufferCount Gets or sets the total number of I/O buffers to be used for the backup or restore operation. (Se hereda de BackupRestoreBase.)
Propiedad pública Checksum Gets or sets a Boolean property value that determines whether a checksum value is calculated during backup or restore operations. (Se hereda de BackupRestoreBase.)
Propiedad pública CompressionOption Gets or sets the compression option for the current backup session and is transient to the Backup Object Microsoft.SqlServer.Management.SmoExtended.Backup
Propiedad pública ContinueAfterError Gets or sets a Boolean property value that determines whether the backup or restore continues after a checksum error occurs. (Se hereda de BackupRestoreBase.)
Propiedad pública CopyOnly Gets or sets a Boolean property value that specifies the backup is a copy-only backup. This does not affect the sequence of backups in the usual backup schedule.
Propiedad pública Database Gets or sets the database on which the backup or restore operation runs. (Se hereda de BackupRestoreBase.)
Propiedad pública DatabaseFileGroups Gets the SQL Server file groups targeted by the backup or restore operation. (Se hereda de BackupRestoreBase.)
Propiedad pública DatabaseFiles Gets the operating system files targeted by the backup or restore operation. (Se hereda de BackupRestoreBase.)
Propiedad pública Devices Gets the backup devices specified for the backup or restore operation. (Se hereda de BackupRestoreBase.)
Propiedad pública ExpirationDate Gets or sets the date and time when the backup set expires and the backup data is no longer considered relevant.
Propiedad pública FormatMedia Gets or sets a Boolean property value that determines whether a tape is formatted as the first step of the backup operation.
Propiedad pública Incremental Gets or sets a Boolean property value that determines whether to perform a differential backup.
Propiedad pública Initialize Gets or sets a Boolean property value that determines whether the devices associated with a backup operation are initialized as part of the backup operation.
Propiedad pública LogTruncation Gets or sets the method used to truncate the database log as part of the backup operation.
Propiedad pública MaxTransferSize Gets or sets the maximum number of bytes to be transferred between the backup media and the instance of SQL Server. (Se hereda de BackupRestoreBase.)
Propiedad pública MediaDescription Gets or sets a textual description of the medium that contains a backup set.
Propiedad pública MediaName Gets or sets the name used to identify a particular media set. (Se hereda de BackupRestoreBase.)
Propiedad pública Mirrors Gets or sets the list of backup devices used by the mirrored backup.
Propiedad pública NoRecovery Gets or sets a Boolean property value that determines whether the tail of the log is backed up and whether the database is restored into the Restoring state. (Se hereda de BackupRestoreBase.)
Propiedad pública NoRewind Gets or sets a Boolean property value that determines whether Microsoft SQL Server will keep the tape open after the backup or restore operation. (Se hereda de BackupRestoreBase.)
Propiedad pública PercentCompleteNotification Gets or sets the percentage interval for PercentCompleteEventHandler event handler calls. (Se hereda de BackupRestoreBase.)
Propiedad pública Restart Gets or sets a Boolean property value that determines whether the backup or restore operation will restart if it is interrupted. (Se hereda de BackupRestoreBase.)
Propiedad pública RetainDays Gets or sets the number of days that must elapse before a backup set can be overwritten.
Propiedad pública SkipTapeHeader Gets or sets Boolean property that determines whether the tape header is read.
Propiedad pública UndoFileName Gets or sets the name of the undo file used to store uncommitted transactions that are rolled back during recovery.
Propiedad pública UnloadTapeAfter Gets or sets a Boolean property value that determines whether tape media are rewound and unloaded after the backup or restore operation completes. (Se hereda de BackupRestoreBase.)

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Métodos

  Nombre Descripción
Método público Abort Terminates a running backup or restore operation. (Se hereda de BackupRestoreBase.)
Método público Equals (Se hereda de Object.)
Método protegido ExecuteSql Executes a batch of Transact-SQL statements that does not expect a returned results set on the specified instance of SQL Server. (Se hereda de BackupRestoreBase.)
Método protegido ExecuteSqlAsync Executes a batch of Transact-SQL statements asynchronously that does not expect a returned results set on the specified instance of SQL Server. (Se hereda de BackupRestoreBase.)
Método protegido ExecuteSqlWithResults Executes a batch of Transact-SQL statements that expects one or more returned results sets on the specified instance of SQL Server. (Se hereda de BackupRestoreBase.)
Método protegido Finalize (Se hereda de Object.)
Método protegido GetDevicesScript Gets the script that is used to create devices. (Se hereda de BackupRestoreBase.)
Método público GetHashCode (Se hereda de Object.)
Método público GetType (Se hereda de Object.)
Método protegido IsStringValid Verifies whether the specified string is valid. (Se hereda de BackupRestoreBase.)
Método protegido MemberwiseClone (Se hereda de Object.)
Método público Script Returns a Transact-SQL statement that can be used to execute the referenced backup.
Método público SetMediaPassword(SecureString) Sets the password for a media set. (Se hereda de BackupRestoreBase.)
Método público SetMediaPassword(String) Sets the password for a media set. (Se hereda de BackupRestoreBase.)
Método público SetPassword(SecureString) Sets the password for a backup set. (Se hereda de BackupRestoreBase.)
Método público SetPassword(String) Sets the password for a backup set. (Se hereda de BackupRestoreBase.)
Método público SqlBackup Performs the database backup operation as specified by the properties of the Backup object used.
Método público SqlBackupAsync Performs the database backup operation asynchronously as specified by the properties of the Backup object used.
Método público ToString (Se hereda de Object.)
Método público Wait Waits for the current backup or restore operation to complete before moving on to the next process. (Se hereda de BackupRestoreBase.)

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Eventos

  Nombre Descripción
Evento público Complete Occurs when the backup or restore operation completes. (Se hereda de BackupRestoreBase.)
Evento público Information Occurs when any informational message is issued by Microsoft SQL Server that cannot be handled by the Complete NextMedia or PercentComplete events. (Se hereda de BackupRestoreBase.)
Evento público NextMedia Occurs when the backup or restore operation exhausts the medium in a target device. (Se hereda de BackupRestoreBase.)
Evento público PercentComplete Occurs when a backup or restore operation reaches a completion unit. (Se hereda de BackupRestoreBase.)

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Campos

  Nombre Descripción
Campo protegido currentAsyncOperation Specifies the current asynchronous operation, such as backup, restore, or none. (Se hereda de BackupRestoreBase.)
Campo protegido m_BackupAction Specifies the backup action type, such as database or log. (Se hereda de BackupRestoreBase.)
Campo protegido m_LogTruncation Specifies whether to truncate the log. (Se hereda de BackupRestoreBase.)
Campo protegido m_RestoreAction Specifies the restore action type, such as database or log. (Se hereda de BackupRestoreBase.)

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Comentarios

A Backup object allows you to do the following:

  • Back up a SQL Server database or database transaction log.

  • Generate a Transact-SQL BACKUP statement defining a backup.

  • Monitor a backup operation, reporting status to the user.

For SQL Server, a database delimits the largest backup unit. Although many different database backup images can be maintained on any single medium, a backup cannot span more than a single database. By default, backup operations performed with a Backup object back up a complete database.

SQL Server can write a backup to one of the following media types: disk, tape, or a proprietary medium called a backup device.

SQL Server supports backup striping. A striped backup is one directed to more than a single device. When striped, a backup is written across the devices in equal chunks. Striping is supported to a single media type only. For example, a backup can be written to two tape devices, but SQL Server cannot write part of a backup to a tape device and the rest to a disk.

At a minimum, you must supply values for a backup source and a backup target when using a Backup object. The Database property (inherited from BackupRestoreBase class) specifies the backup operation source.

To get Backup object properties, users can be a member of the public fixed server role.

To set Backup object properties, users must have BACKUP DATABASE or BACKUP LOG permissions on the database, or be a member of the db_owner and db_backupoperator fixed database role and the sysadmin fixed server role.

To run the SqlBackup method, users must have BACKUP DATABASE or BACKUP LOG permissions on the database, or be a member of the db_owner and db_backupoperator fixed database role and the sysadmin fixed server role.

Seguridad para subprocesos

Cualquier miembro público static (Shared en Visual Basic) de este tipo es seguro para subprocesos. No se garantiza que los miembros de instancia sean seguros para subprocesos.