JetEndExternalBackupInstance2 Function

Artikkel
08/26/2021

Applies to: Windows | Windows Server

JetEndExternalBackupInstance2 Function

The JetEndExternalBackupInstance2 function ends an external backup session. This API is the last API in a series of APIs that must be called to execute a successful online (non-VSS based) backup.

Windows XP: JetEndExternalBackupInstance2 is introduced in Windows XP.

    JET_ERR JET_API JetEndExternalBackupInstance2(
      __in          JET_INSTANCE instance,
      __in          JET_GRBIT grbit
    );

Parameters

instance

The instance to use for this call.

Windows 2000: For Windows 2000, the API variant that accepts this parameter is not available because only one instance is supported. The use of this one global instance is implied in this case.

Windows XP: For Windows XP and later releases, the API variant that does not accept this parameter can only be called when the engine is in legacy mode (Windows 2000 compatibility mode) where only one instance is supported. Otherwise, the operation will fail with JET_errRunningInMultiInstanceMode.

grbit

A group of bits that specifies zero or more of the following options.

Value	Meaning
JET_bitBackupEndAbort 0x0002	The client application is aborting the backup.
JET_bitBackupEndNormal 0x0001	The client application finished the backup completely, and is ending normally.
JET_bitBackupTruncateDone 0x0100	Windows Vista: JET_bitBackupTruncateDone is introduced in Windows Vista. The engine can mark the database headers as appropriate (for example, a full backup completed), even though the call to truncate was not completed.

Value

Meaning

JET_bitBackupEndAbort
0x0002

The client application is aborting the backup.

JET_bitBackupEndNormal
0x0001

The client application finished the backup completely, and is ending normally.

JET_bitBackupTruncateDone
0x0100

Windows Vista: JET_bitBackupTruncateDone is introduced in Windows Vista.

The engine can mark the database headers as appropriate (for example, a full backup completed), even though the call to truncate was not completed.

Return Value

This function returns the JET_ERR datatype with one of the following return codes. For more information about the possible ESE errors, see Extensible Storage Engine Errors and Error Handling Parameters.

Return code	Description
JET_errSuccess	The operation completed successfully.
JET_errBackupAbortByCaller	Windows XP: This return value is introduced in Windows XP. The caller terminated a backup in the middle of the backup sequence without signaling the intention with JetStopBackup. This error is result of a bug in the backup client in Windows Server 2003 and later. In Windows XP this error is returned for an intentional termination of the external backup sequence.
JET_errBackupAbortByServer	Windows Server 2003: This return value is introduced in Windows Server 2003. The operation failed because the current external backup has been aborted by a call to JetStopBackup.
JET_errClientRequestToStopJetService	The operation cannot complete because all activity on the instance that is associated with the session has ceased as a result of a call to JetStopService.
JET_errInstanceUnavailable	Windows XP: This return value is introduced in Windows XP. The operation cannot complete because the instance that is associated with the session encountered a fatal error that requires that access to all data be revoked to protect the integrity of that data.
JET_errNoBackup	The operation failed because no external backup is in progress.
JET_errNotInitialized	The operation cannot complete because the instance that is associated with the session has not yet been initialized.
JET_errRestoreInProgress	The operation cannot complete because a restore operation is in progress on the instance that is associated with the session.
JET_errRunningInMultiInstanceMode	The operation failed because an attempt was made to use the engine in legacy mode (Windows 2000 compatibility mode) where only one instance is supported, when in fact multiple instances already exist.
JET_errTermInProgress	The operation cannot complete because the instance that is associated with the session is being shut down.

If the function succeeds, the external backup was a success. Success indicates that all files (for example, databases and logs) that are appropriate for the type of backup (specified in JetBeginExternalBackup) were retrieved from the backup engine. The backed up files can be recovered with hard recovery (JetExternalRestore).

If this function fails, the external backup usually ends. Failure means that the backup is invalid because of a client or an application usage error. It is important to check the return code for this API to verify that the backup sequence was successful.

Remarks

If the engine is configured to log events, an event is logged to indicate the resolution of the external backup.

If the backup sequence is not completed in order and with a successful call to JetEndExternalBackup, subsequent incremental backups might contain more data than the application anticipated.

For more information about the external backup API sequence, see JetBeginExternalBackup.

Before Windows Vista, if the log truncation was not done, the engine considered that the backup was a copy backup. However, the backup might be a normal backup for which truncation was not done (for example, if there are detached databases). The JET_bitBackupTruncateDone option can be used to inform the engine about this and allow appropriate database header modifications.

Requirements

Requirement	Value
Client	Requires Windows Vista or Windows XP.
Server	Requires Windows Server 2008 or Windows Server 2003.
Header	Declared in Esent.h.
Library	Use ESENT.lib.
DLL	Requires ESENT.dll.

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JetEndExternalBackupInstance2 Function