实战:sqlserver 2008 R2容灾方案:另一种思路-2

2.通过第三方软件实时传递数据到B数据库服务器

这种类似的软件很多,如Allway Sync之类的软件,间隔同步时间最好实时 .



3.通过下面脚本来实现是否需要还原

下面只是列出需要的脚本文件，没有列出的文件只需新建相同的文件名即可.

3.1 备库上新建几个监控的表:table.txt

USE [master]

GO

if object_id('restorehistoty-suzhou') is not null

drop table [restorehistoty-suzhou]

go

CREATE TABLE [dbo].[restorehistoty-suzhou](

[id] [int] IDENTITY(1,1) NOT NULL,

[backupfile] [nvarchar](255) not null primary key,

[resdate] [datetime] NULL,

)

GO

ALTER TABLE [dbo].[restorehistoty-suzhou] ADD DEFAULT (getdate()) FOR [resdate]

GO

if object_id('pre-suzhou') is not null

drop table [pre-suzhou]

go

CREATE TABLE [dbo].[pre-suzhou](

[id] [int] IDENTITY(1,1) NOT NULL,

[backupfile] [nvarchar](255) not null primary key,

[resdate] [datetime] NULL,

)

GO

ALTER TABLE [dbo].[pre-suzhou] ADD DEFAULT (getdate()) FOR [resdate]

GO





if object_id('filelist-suzhou') is not null

drop table [filelist-suzhou]

go

CREATE TABLE [dbo].[filelist-suzhou](

[backupfile] [nvarchar](255) NULL

)

GO



create table [restorehistoty-suzhou-tsql]

(

tsql nvarchar(max)

)



3.2 openshell.txt

--开xp_cmdshell

-- To allow advanced options to be changed.

EXEC sp_configure 'show advanced options', 1

GO

-- To update the currently configured value for advanced options.

RECONFIGURE WITH OVERRIDE

GO

-- To enable the feature.

EXEC sp_configure 'xp_cmdshell', 1

GO

-- To update the currently configured value for this feature.

RECONFIGURE WITH OVERRIDE

GO

-- To disallow advanced options to be changed.

EXEC sp_configure 'show advanced options', 0

GO

-- To update the currently configured value for advanced options.

RECONFIGURE WITH OVERRIDE

GO

3.3 in.txt

set nocount on

declare @backuppath nvarchar(500)

declare @cmd nvarchar(3000)

declare @currenttime datetime

declare @extime int

set @currenttime=GETDATE()

set @extime=DATEPART(MI,@currenttime)

set @backuppath = 'S:\backup\old\suzhou'

-- 4.获得文件列表

set @cmd = 'dir /b /s ' + @backuppath

truncate table [filelist-suzhou]

insert into [filelist-suzhou]

exec master.sys.xp_cmdshell @cmd

declare @lastbackup nvarchar(500)

select @lastbackup=max(backupfile)

from [filelist-suzhou]

where backupfile like '%_log_%.trn'

if exists(select backupfile from [pre-suzhou] where
backupfile=@lastbackup)

begin

--print '日志备份文件'+@lastbackup+'是过期的日志备份';

print 0;

return;

end

else

begin

insert into [pre-suzhou](backupfile) values(@lastbackup)

set @cmd = 'restore log suzhou from disk = '''+ @lastbackup + ''' with norecovery'

insert into [restorehistoty-suzhou](backupfile) values(@cmd)

print @cmd

end

set nocount off

go

3.4 closeshell.txt

--禁用xp_cmdshell，

-- To allow advanced options to be changed.

EXEC sp_configure 'show advanced options', 1

GO

-- To update the currently configured value for advanced options.

RECONFIGURE WITH OVERRIDE

GO

-- To disable the feature.

EXEC sp_configure 'xp_cmdshell', 0

GO

-- To update the currently configured value for this feature.

RECONFIGURE WITH OVERRIDE

GO

-- To disallow advanced options to be changed.

EXEC sp_configure 'show advanced options', 0

GO

-- To update the currently configured value for advanced options.

RECONFIGURE WITH OVERRIDE

GO

3.5 suzhou.bat 主文件

sqlcmd -S dellsql -i S:\dba\restore\suzhou\openshell.txt -o S:\dba\restore\suzhou\outopenshell.txt

sqlcmd -S dellsql -i S:\dba\restore\suzhou\in.txt -o S:\dba\restore\suzhou\out.txt

@echo off

echo >S:\dba\restore\suzhou\tmp.txt

for /f %%a in (S:\dba\restore\suzhou\out.txt) do set var=%%a

if "%var%" =="0" goto exist

goto continu



:exist

echo 不需要恢复日志!>>S:\dba\restore\suzhou\tmp.txt

exit





:continu

echo 恢复日志,继续执行!>>S:\dba\restore\suzhou\tmp.txt



sqlcmd -S dellsql -i S:\dba\restore\suzhou\out.txt -e -o S:\dba\restore\suzhou\re.txt

sqlcmd -S dellsql -i S:\dba\restore\suzhou\input.txt -o S:\dba\restore\suzhou\inputre.txt

sqlcmd -S dellsql -i S:\dba\restore\suzhou\closeshell.txt -o S:\dba\restore\suzhou\outcloseshell.txt





4.通过后端计划任务来调用批处理即可

这个就简单了！ 根据自己需要间隔来执行.



5.查看执行结果

select top 5 * from master.dbo.[pre-suzhou]

order by id desc

go

select top 5 * from [restorehistoty-suzhou]

order by id desc

select top 5 * from [restorehistoty-suzhou]

where backupfile in

(

select distinct tsql from [restorehistoty-suzhou-tsql]

where tsql like '%s:%.trn%'

)

order by id desc