Sql-Server

用於恢復數據庫的循環

  • November 29, 2016

相當大而復雜的問題。有幾個數據庫（DB1、DB2、DB3）需要從一個區域複製到另一個區域（從生產區域到辦公區域）。流程需要：當發生 sql 作業時，將其中一個數據庫（例如 DB1）中的數據複製到數據庫 TRANSFER，然後完成 TRANSFER 數據庫的備份並發送到網路驅動器。之後恢復開始，它正在恢復辦公區域數據庫。

問題是，如何確保不會同時啟動多個傳輸並循環等待的方式。

USE [msdb]
GO

/****** Object:  Job [TransferDB_Backup]    Script Date: 11/28/2016 1:07:49 PM ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** Object:  JobCategory [[Uncategorized (Local)]]    Script Date: 11/28/2016 1:07:49 PM ******/
IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'[Uncategorized (Local)]' AND category_class=1)
BEGIN
EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'JOB', @type=N'LOCAL', @name=N'[Uncategorized (Local)]'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

END

DECLARE @jobId BINARY(16)
EXEC @ReturnCode =  msdb.dbo.sp_add_job @job_name=N'TransferDB_Backup', 
       @enabled=1, 
       @notify_level_eventlog=0, 
       @notify_level_email=0, 
       @notify_level_netsend=0, 
       @notify_level_page=0, 
       @delete_level=0, 
       @description=N'No description available.', 
       @category_name=N'[Uncategorized (Local)]', 
       @owner_login_name=N'sa', @job_id = @jobId OUTPUT
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:  Step [Create Backup]    Script Date: 11/28/2016 1:07:49 PM ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'Create Backup', 
       @step_id=1, 
       @cmdexec_success_code=0, 
       @on_success_action=3, 
       @on_success_step_id=0, 
       @on_fail_action=2, 
       @on_fail_step_id=0, 
       @retry_attempts=0, 
       @retry_interval=0, 
       @os_run_priority=0, @subsystem=N'TSQL', 
       @command=N'USE [TRANSFER]
GO
USE MASTER
GO

BACKUP DATABASE [TRANSFER] TO  DISK = N''\\location\Transfer.bak'' WITH NOFORMAT, NOINIT,  NAME = N''TRANSFER-Full Database Backup'', SKIP, NOREWIND, NOUNLOAD, COMPRESSION,  STATS = 10
GO
', 
       @database_name=N'master', 
       @flags=0
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:  Step [Delete objectz]    Script Date: 11/28/2016 1:07:49 PM ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'Delete objectz', 
       @step_id=2, 
       @cmdexec_success_code=0, 
       @on_success_action=3, 
       @on_success_step_id=0, 
       @on_fail_action=2, 
       @on_fail_step_id=0, 
       @retry_attempts=0, 
       @retry_interval=0, 
       @os_run_priority=0, @subsystem=N'TSQL', 
       @command=N'USE TRANSFER
GO

declare @n char(1)
set @n = char(10)

declare @stmt nvarchar(max)

-- procedures
select @stmt = isnull( @stmt + @n, '''' ) +
   ''drop procedure .['' + schema_name(schema_id) + ''].['' + name + '']''
from sys.procedures


-- check constraints
select @stmt = isnull( @stmt + @n, '''' ) +
''alter table [TRANSFER].['' + schema_name(schema_id) + ''].['' + object_name( parent_object_id ) + '']    drop constraint ['' + name + '']''
from sys.check_constraints

-- functions
select @stmt = isnull( @stmt + @n, '''' ) +
   ''drop function [TRANSFER].['' + schema_name(schema_id) + ''].['' + name + '']''
from sys.objects
where type in ( ''FN'', ''IF'', ''TF'' )

-- views
select @stmt = isnull( @stmt + @n, '''' ) +
   ''drop view [TRANSFER].['' + schema_name(schema_id) + ''].['' + name + '']''
from sys.views

-- foreign keys
select @stmt = isnull( @stmt + @n, '''' ) +
   ''alter table [TRANSFER].['' + schema_name(schema_id) + ''].['' + object_name( parent_object_id ) + ''] drop constraint ['' + name + '']''
from sys.foreign_keys

-- tables
select @stmt = isnull( @stmt + @n, '''' ) +
   ''drop table [TRANSFER].['' + schema_name(schema_id) + ''].['' + name + '']''
from sys.tables

-- user defined types
select @stmt = isnull( @stmt + @n, '''' ) +
   ''drop type [TRANSFER].['' + schema_name(schema_id) + ''].['' + name + '']''
from sys.types
where is_user_defined = 1



--print @stmt
exec sp_executesql @stmt
', 
       @database_name=N'TRANSFER', 
       @flags=0
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:  Step [Cleate tliggelfile]    Script Date: 11/28/2016 1:07:49 PM ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'Cleate tliggelfile', 
       @step_id=3, 
       @cmdexec_success_code=0, 
       @on_success_action=1, 
       @on_success_step_id=0, 
       @on_fail_action=2, 
       @on_fail_step_id=0, 
       @retry_attempts=0, 
       @retry_interval=0, 
       @os_run_priority=0, @subsystem=N'CmdExec', 
       @command=N'echo 1 > \\location\Transfer.trig', 
       @flags=0
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_update_job @job_id = @jobId, @start_step_id = 1
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @jobId, @server_name = N'(local)'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
   IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION
EndSave:

GO

我強烈建議您放棄 tsql 並改用 PowerShell。它特別為您所做的事情增加了更多價值。確保您在源和目標伺服器實例上使用備份壓縮和即時文件初始化。

Copy-SqlDatabase來自 dbatools.io

例如用法：

Copy-SqlDatabase -Source sqlserver2014a -Destination sqlcluster -Exclude Northwind、pubs、AdventureWorks -BackupRestore -NetworkShare \fileshare\sql\migration

畢竟，非常簡單的解決方案。只需檢查 Transfer 數據庫上是否有一些活動。

DECLARE @TransferDB_Active BIT = 1
WHILE @TransferDB_Active = 1
BEGIN
if object_id ('tempdb..#TransferCheck') is not null drop table #TransferCheck
SELECT
  [Database]      = ISNULL(db_name(r.database_id), N'')
 ,[Task State]    = ISNULL(t.task_state, N'')
 ,[Command]       = ISNULL(r.command, N'')
 ,[Application]   = ISNULL(s.program_name, N'')
 -- ,[Login Time]    = s.login_time,
  --,[Host Name]     = ISNULL(s.host_name, N'')
  --,[Net Address]   = ISNULL(c.client_net_address, N'')
into #TransferCheck
FROM sys.dm_exec_sessions s LEFT OUTER JOIN sys.dm_exec_connections c ON (s.session_id = c.session_id)
LEFT OUTER JOIN sys.dm_exec_requests r ON (s.session_id = r.session_id)
LEFT OUTER JOIN sys.dm_os_tasks t ON (r.session_id = t.session_id AND r.request_id = t.request_id)
LEFT OUTER JOIN
(   SELECT *, ROW_NUMBER() OVER (PARTITION BY waiting_task_address ORDER BY wait_duration_ms DESC) AS row_num
   FROM sys.dm_os_waiting_tasks
) w ON (t.task_address = w.waiting_task_address) AND w.row_num = 1
LEFT OUTER JOIN sys.dm_exec_requests r2 ON (r.session_id = r2.blocking_session_id)

select * from #TransferCheck
where [Database] = 'Transfer' and [Task State] = 'RUNNING'

IF @@ROWCOUNT = 0 --If @@ROWCOUNT = 0, then no activities are running
   BEGIN
       SET @TransferDB_Active = 0 --Drop out of WHILE loop

       BREAK
   END

   WAITFOR DELAY '00:00:10' --Take a break and check again
END

引用自：https://dba.stackexchange.com/questions/156568

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