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,

)
 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