如何实现alwayson的备份还原脚本
这篇文章主要介绍如何实现alwayson的备份还原脚本，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
1、 备份数据库
在主副本上，将需要做AlwaysOn的数据库做一次全备和日志备份（NOTE：禁用事务日志备份作业，如果有的话）
替换参数，执行如下脚本生成备份语句，然后执行：
DECLARE @DBName NVARCHAR(255)
DECLARE @SQL NVARCHAR(MAX)
DECLARE @BackupToPath NVARCHAR(500)
SET @DBName='datayesdb' --数据库名称
SET @BackupToPath='D:' --数据库备份在主副本的存放路径
SET NOCOUNT ON
PRINT '-- ============================================='
PRINT '-- AlwaysOn主副本上备份数据库(完整备份+事务日志备份)'+CHAR(13)
SET @SQL='USE [master]
GO
ALTER DATABASE ['+@DBName+'] SET RECOVERY FULL;
GO
BACKUP DATABASE ['+@DBName+']
TO DISK='''+@BackupToPath+'\'+@DBName+'.bak'' WITH COMPRESSION
GO
BACKUP LOG ['+@DBName+']
TO DISK='''+@BackupToPath+'\'+@DBName+'.trn'' WITH COMPRESSION
GO'+CHAR(13)
PRINT @SQL
2、 还原数据库
将备份文件复制到辅助副本服务器，使用NORECOVERY方式还原。
替换参数，执行如下脚本生成备份语句，然后执行：
DECLARE @DBName NVARCHAR(255)
DECLARE @SQL NVARCHAR(MAX)
DECLARE @RestoreFromPath NVARCHAR(MAX)
DECLARE @RestoreToDataFileFolder NVARCHAR(200)
DECLARE @RestoreToLogFileFolder NVARCHAR(200)
SET @DBName='datayesdb' --数据库名称
SET @RestoreFromPath='D:\share' --数据库备份在辅助副本的存放路径
SET @RestoreToDataFileFolder='D:\SQLData' --数据库备份的数据文件在辅助副本的还原路径
SET @RestoreToLogFileFolder='D:\SQLLog' --数据库备份的日志文件在辅助副本的还原路径
SET NOCOUNT ON
PRINT '-- ============================================='
PRINT '-- AlwayOn辅助副本还原数据库(指定NORECOVERY方式还原)'+CHAR(13)
DECLARE @RestoreFilePath NVARCHAR(MAX)
DECLARE @LNAME NVARCHAR(500)
DECLARE @PNAME NVARCHAR(500)
DECLARE @PFName NVARCHAR(500)
DECLARE @BackupType CHAR(1)
SET @RestoreFilePath=''
SET @SQL = 'RESTORE FILELISTONLY FROM DISK = '''+@RestoreFromPath+'\'+@DBName+'.bak'+''''
if OBJECT_ID ('tempdb..#temp')is not null
BEGIN
DROP TABLE #BackupFileList
END
CREATE TABLE #BackupFileList
(
LogicalName NVARCHAR(128) ,
PhysicalName NVARCHAR(260) ,
BackupType CHAR(1) ,
FileGroupName NVARCHAR(128) ,
SIZE NUMERIC(20,0),
MaxSize NUMERIC(20,0) ,
FileID BIGINT ,
CreateLSN NUMERIC(25,0) ,
DropLSN NUMERIC(25,0) NULL ,
UniqueID UNIQUEIDENTIFIER ,
ReadOnlyLSN NUMERIC(25,0) NULL ,
ReadWriteLSN NUMERIC(25,0) NULL ,
BackupSizeInBytes BIGINT ,
SourceBlockSize INT ,
FileGroupID INT ,
LogGroupGUID UNIQUEIDENTIFIER NULL ,
DifferentialBaseLSN NUMERIC(25,0) NULL ,
DifferentialBaseGUID UNIQUEIDENTIFIER ,
IsReadOnly BIT ,
IsPresent BIT ,
TDEThumbprint NVARCHAR(100)
)
INSERT INTO #BackupFileList EXEC (@SQL);
DECLARE CurTBName CURSOR
FOR
SELECT LogicalName,PhysicalName,BackupType FROM #BackupFileList
OPEN CurTBName
FETCH NEXT FROM CurTBName INTO @LNAME,@PNAME,@BackupType
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @PFName=RIGHT(@PNAME, CHARINDEX('\',REVERSE(@PNAME))-1)
SET @RestoreFilePath=' MOVE N'''+@LNAME+''' TO N'''
+CASE WHEN @BackupType='D' THEN @RestoreToDataFileFolder ELSE @RestoreToLogFileFolder END
+'\'+@PFName+''', '+CHAR(13)+@RestoreFilePath
FETCH NEXT FROM CurTBName INTO @LNAME,@PNAME,@BackupType
END
CLOSE CurTBName
DEALLOCATE CurTBName
SET @SQL='USE [master]
GO
RESTORE DATABASE '+@DBName+' FROM DISK = N'''+@RestoreFromPath+'\'+@DBName+'.bak'' WITH FILE = 1,'+CHAR(13)
+@RestoreFilePath
+'NORECOVERY,NOUNLOAD,STATS = 10
GO
RESTORE LOG '+@DBName+' FROM DISK = N'''+@RestoreFromPath+'\'+@DBName+'.trn'' WITH NORECOVERY
GO'+CHAR(13)
PRINT @SQL
DROP TABLE #BackupFileList
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