아티클
09/27/2010

데이터베이스 및 트랜잭션 로그 백업 및 복원

SMO에서 Backup 클래스와 Restore 클래스는 특정 백업 및 복원 작업을 수행하는 도구를 제공하는 유틸리티 클래스입니다. Backup 개체는 서버 인스턴스의 MicrosoftSQL Server 개체 대신에 필요한 특정 백업 작업을 나타냅니다.

데이터 손실이나 손상이 발생하면 완전히 또는 부분적으로 백업을 복원해야 합니다. 부분 복원에서는 복원할 데이터를 분할하기 위해 FileGroupCollection 컬렉션을 사용합니다. 백업에 트랜잭션 로그가 있으면 Restore 개체의 ToPointInTime 속성을 사용하여 특정 시점까지 데이터를 복원할 수 있습니다. 또한 SqlVerify 메서드를 사용하여 데이터의 유효성을 확인할 수 있습니다. 권장되는 백업 절차는, 복원 작업을 수행하고 정기적으로 데이터베이스의 데이터를 검사하여 백업 무결성을 확인하는 것입니다.

Backup 개체와 마찬가지로 Restore 개체도 SQL Server 인스턴스에 개체를 표시하지 않기 때문에 Create 메서드를 사용하여 만들 필요가 없습니다. Restore 개체는 데이터베이스 복원에 사용되는 일련의 속성과 메서드입니다.

예

제공된 코드 예제를 사용하려면 응용 프로그램을 만들 프로그래밍 환경, 프로그래밍 템플릿 및 프로그래밍 언어를 선택해야 합니다. 자세한 내용은 방법: Visual Studio .NET에서 Visual Basic SMO 프로젝트 만들기 또는 방법: Visual Studio .NET에서 Visual C# SMO 프로젝트 만들기를 참조하십시오.

Visual Basic에서 데이터베이스 및 트랜잭션 로그 백업

이 코드 예제는 기존 데이터베이스를 파일로 백업한 다음 복원하는 방법을 보여 줍니다.

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
'Reference the AdventureWorks database.
Dim db As Database
db = srv.Databases("AdventureWorks")
'Store the current recovery model in a variable.
Dim recoverymod As Integer
recoverymod = db.DatabaseOptions.RecoveryModel
'Define a Backup object variable. 
Dim bk As New Backup
'Specify the type of backup, the description, the name, and the database to be backed up.
bk.Action = BackupActionType.Database
bk.BackupSetDescription = "Full backup of Adventureworks"
bk.BackupSetName = "AdventureWorks Backup"
bk.Database = "AdventureWorks"
'Declare a BackupDeviceItem by supplying the backup device file name in the constructor, and the type of device is a file.
Dim bdi As BackupDeviceItem
bdi = New BackupDeviceItem("Test_Full_Backup1", DeviceType.File)
'Add the device to the Backup object.
bk.Devices.Add(bdi)
'Set the Incremental property to False to specify that this is a full database backup.
bk.Incremental = False
'Set the expiration date.
Dim backupdate As New Date
backupdate = New Date(2006, 10, 5)
bk.ExpirationDate = backupdate
'Specify that the log must be truncated after the backup is complete.
bk.LogTruncation = BackupTruncateLogType.Truncate
'Run SqlBackup to perform the full database backup on the instance of SQL Server.
bk.SqlBackup(srv)
'Inform the user that the backup has been completed.
Console.WriteLine("Full Backup complete.")
'Remove the backup device from the Backup object.
bk.Devices.Remove(bdi)
'Make a change to the database, in this case, add a table called test_table.
Dim t As Table
t = New Table(db, "test_table")
Dim c As Column
c = New Column(t, "col", DataType.Int)
t.Columns.Add(c)
t.Create()
'Create another file device for the differential backup and add the Backup object.
Dim bdid As BackupDeviceItem
bdid = New BackupDeviceItem("Test_Differential_Backup1", DeviceType.File)
'Add the device to the Backup object.
bk.Devices.Add(bdid)
'Set the Incremental property to True for a differential backup.
bk.Incremental = True
'Run SqlBackup to perform the incremental database backup on the instance of SQL Server.
bk.SqlBackup(srv)
'Inform the user that the differential backup is complete.
Console.WriteLine("Differential Backup complete.")
'Remove the device from the Backup object.
bk.Devices.Remove(bdid)
'Delete the AdventureWorks database before restoring it.
srv.Databases("AdventureWorks").Drop()
'Define a Restore object variable.
Dim rs As Restore
rs = New Restore
'Set the NoRecovery property to true, so the transactions are not recovered.
rs.NoRecovery = True
'Add the device that contains the full database backup to the Restore object.
rs.Devices.Add(bdi)
'Specify the database name.
rs.Database = "AdventureWorks"
'Restore the full database backup with no recovery.
rs.SqlRestore(srv)
'Inform the user that the Full Database Restore is complete.
Console.WriteLine("Full Database Restore complete.")
'Remove the device from the Restore object.
rs.Devices.Remove(bdi)
'Set te NoRecovery property to False.
rs.NoRecovery = False
'Add the device that contains the differential backup to the Restore object.
rs.Devices.Add(bdid)
'Restore the differential database backup with recovery.
rs.SqlRestore(srv)
'Inform the user that the differential database restore is complete.
Console.WriteLine("Differential Database Restore complete.")
'Remove the device.
rs.Devices.Remove(bdid)
'Set the database recovery mode back to its original value.
srv.Databases("AdventureWorks").DatabaseOptions.RecoveryModel = recoverymod
'Drop the table that was added.
srv.Databases("AdventureWorks").Tables("test_table").Drop()
srv.Databases("AdventureWorks").Alter()
'Remove the backup files from the hard disk.
My.Computer.FileSystem.DeleteFile("C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Backup\Test_Full_Backup1")
My.Computer.FileSystem.DeleteFile("C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Backup\Test_Differential_Backup1")

Visual C#에서 데이터베이스 및 트랜잭션 로그 백업

이 코드 예제는 기존 데이터베이스를 파일로 백업한 다음 복원하는 방법을 보여 줍니다.

//Connect to the local, default instance of SQL Server. 
{ 
Server srv = default(Server); 
srv = new Server(); 
//Reference the AdventureWorks database. 
Database db = default(Database); 
db = srv.Databases("AdventureWorks"); 
//Store the current recovery model in a variable. 
int recoverymod = 0; 
recoverymod = db.DatabaseOptions.RecoveryModel; 
//Define a Backup object variable. 
Backup bk = new Backup(); 
//Specify the type of backup, the description, the name, and the database to be backed up. 
bk.Action = BackupActionType.Database; 
bk.BackupSetDescription = "Full backup of Adventureworks"; 
bk.BackupSetName = "AdventureWorks Backup"; 
bk.Database = "AdventureWorks"; 
//Declare a BackupDeviceItem by supplying the backup device file name in the constructor, and the type of device is a file. 
BackupDeviceItem bdi = default(BackupDeviceItem); 
bdi = new BackupDeviceItem("Test_Full_Backup1", DeviceType.File); 
//Add the device to the Backup object. 
bk.Devices.Add(bdi); 
//Set the Incremental property to False to specify that this is a full database backup. 
bk.Incremental = false; 
//Set the expiration date. 
System.DateTime backupdate = new System.DateTime(); 
backupdate = new System.DateTime(2006, 10, 5); 
bk.ExpirationDate = backupdate; 
//Specify that the log must be truncated after the backup is complete. 
bk.LogTruncation = BackupTruncateLogType.Truncate; 
//Run SqlBackup to perform the full database backup on the instance of SQL Server. 
bk.SqlBackup(srv); 
//Inform the user that the backup has been completed. 
Console.WriteLine("Full Backup complete."); 
//Remove the backup device from the Backup object. 
bk.Devices.Remove(bdi); 
//Make a change to the database, in this case, add a table called test_table. 
Table t = default(Table); 
t = new Table(db, "test_table"); 
Column c = default(Column); 
c = new Column(t, "col", DataType.Int); 
t.Columns.Add(c); 
t.Create(); 
//Create another file device for the differential backup and add the Backup object. 
BackupDeviceItem bdid = default(BackupDeviceItem); 
bdid = new BackupDeviceItem("Test_Differential_Backup1", DeviceType.File); 
//Add the device to the Backup object. 
bk.Devices.Add(bdid); 
//Set the Incremental property to True for a differential backup. 
bk.Incremental = true; 
//Run SqlBackup to perform the incremental database backup on the instance of SQL Server. 
bk.SqlBackup(srv); 
//Inform the user that the differential backup is complete. 
Console.WriteLine("Differential Backup complete."); 
//Remove the device from the Backup object. 
bk.Devices.Remove(bdid); 
//Delete the AdventureWorks database before restoring it. 
srv.Databases("AdventureWorks").Drop(); 
//Define a Restore object variable. 
Restore rs = default(Restore); 
rs = new Restore(); 
//Set the NoRecovery property to true, so the transactions are not recovered. 
rs.NoRecovery = true; 
//Add the device that contains the full database backup to the Restore object. 
rs.Devices.Add(bdi); 
//Specify the database name. 
rs.Database = "AdventureWorks"; 
//Restore the full database backup with no recovery. 
rs.SqlRestore(srv); 
//Inform the user that the Full Database Restore is complete. 
Console.WriteLine("Full Database Restore complete."); 
//Remove the device from the Restore object. 
rs.Devices.Remove(bdi); 
//Set te NoRecovery property to False. 
rs.NoRecovery = false; 
//Add the device that contains the differential backup to the Restore object. 
rs.Devices.Add(bdid); 
//Restore the differential database backup with recovery. 
rs.SqlRestore(srv); 
//Inform the user that the differential database restore is complete. 
Console.WriteLine("Differential Database Restore complete."); 
//Remove the device. 
rs.Devices.Remove(bdid); 
//Set the database recovery mode back to its original value. 
srv.Databases("AdventureWorks").DatabaseOptions.RecoveryModel = recoverymod; 
//Drop the table that was added. 
srv.Databases("AdventureWorks").Tables("test_table").Drop(); 
srv.Databases("AdventureWorks").Alter(); 
//Remove the backup files from the hard disk. 
My.Computer.FileSystem.DeleteFile("C:\\Program Files\\Microsoft SQL Server\\MSSQL.1\\MSSQL\\Backup\\Test_Full_Backup1"); 
My.Computer.FileSystem.DeleteFile("C:\\Program Files\\Microsoft SQL Server\\MSSQL.1\\MSSQL\\Backup\\Test_Differential_Backup1"); 
}

Visual Basic에서 데이터베이스 무결성 검사 실행

SQL Server는 데이터 무결성 검사를 제공합니다. 이 코드 예제는 지정된 데이터베이스에서 데이터베이스 일관성 형식 검사를 실행합니다. 이 예에서는 CheckTables가 사용되지만 CheckAllocations, CheckCatalog 또는 CheckIdentityValues를 같은 방식으로 사용할 수 있습니다.

[!참고]

StringCollection 개체에는 imports System.Collections.Specialized 문을 사용하여 네임스페이스에 대한 참조를 추가해야 합니다.

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
'Reference the AdventureWorks database.
Dim db As Database
db = srv.Databases("AdventureWorks")
'Note, to use the StringCollection type the System.Collections.Specialized system namespace must be included in the imports statements.
Dim sc As StringCollection
'Run the CheckTables method and display the results from the returned StringCollection variable.
sc = db.CheckTables(RepairType.None)
Dim c As Integer
For c = 0 To sc.Count - 1
    Console.WriteLine(sc.Item(c))
Next

Visual C#에서 데이터베이스 무결성 검사 실행