【发布时间】：2013-04-09 06:19:51
【问题描述】：
我的工作是获取数据库备份文件并使用七个 zips 命令行实用程序将它们压缩为 .7z 文件，目前它需要大约 8 个小时来运行所有 .bak 文件，因为它一次只做一个.这是在大约 16 个内核上运行的，而 7z 进程似乎只使用 1 个内核，所以我希望能够运行 xp_cmdshell 命令的多个实例来一次压缩多个文件。有没有办法在 MSSQL Server 2005 上执行 T SQL 中的命令列表？
我在下面发布了我的脚本。
这是我用来压缩文件的程序的链接。 [http://downloads.sourceforge.net/sevenzip/7za920.zip][1]
-- YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
-- II zip all files in a folder II
-- VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
-- Zip and then Delete all files from the backup folder
-- List all files in a directory - T-SQL parse string for date and filename
DECLARE @PathName VARCHAR(256) ,
@CMD VARCHAR(512)
CREATE TABLE #CommandShell ( Line VARCHAR(512))
-- To use the xp_cmdshell option it has to be enabled. you can use the script bellow to enable it.
--
-- -- run exec sp_configure to see if the option exists in this list and you can check if it is enabled.
-- EXEC sp_configure
-- go
-- -- if you don't see xp_cmdshell in the list then you will have to enable advanced options first
-- -- before you can enable the xp_cmdshell option.
-- EXEC sp_configure 'show advanced options', 1;
-- go
-- reconfigure
-- go
-- -- if xp_cmdshell is in the list then you should just need to run this script.
-- exec sp_configure 'xp_cmdshell', 1
-- go
-- reconfigure
SET @PathName = 'D:\FILES\Backups\'
SET @CMD = 'DIR ' + @PathName + ' /TC'
INSERT INTO #CommandShell
EXEC MASTER..xp_cmdshell @CMD
-- Delete lines not containing filename
DELETE
FROM #CommandShell
WHERE Line NOT LIKE '[0-9][0-9]/[0-9][0-9]/[0-9][0-9][0-9][0-9] %'
OR Line LIKE '%<DIR>%'
OR Line is null
-- SQL reverse string function - charindex string function
SELECT ROW_NUMBER() OVER (ORDER BY REVERSE( LEFT(REVERSE(Line),CHARINDEX(' ',REVERSE(line))-1 ) )) AS ROW_NUM,
FileName = REVERSE( LEFT(REVERSE(Line),CHARINDEX(' ',REVERSE(line))-1 ) ),
CreateDate = LEFT(Line,10)
INTO #tempFileList
FROM #CommandShell
WHERE REVERSE( LEFT(REVERSE(Line),CHARINDEX(' ',REVERSE(line))-1 ) ) LIKE '%.bak'
ORDER BY FileName
DROP TABLE #CommandShell
DECLARE @FileMaxRownum INT
SET @FileMaxRownum = (SELECT MAX(ROW_NUM) FROM #tempFileList)
DECLARE @FileIter INT
SET @FileIter = (SELECT MIN(ROW_NUM) FROM #tempFileList)
WHILE @FileIter <= @FileMaxRownum
BEGIN
DECLARE @DelFile varchar(200)
--@@
DECLARE @cmd2 VARCHAR(1000)
SET @cmd2 = null
DECLARE @db_bkp_files_dir varchar(100)
SET @db_bkp_files_dir = null
DECLARE @archive_destination_dir varchar(100)
SET @archive_destination_dir = null
DECLARE @archive_name varchar(100)
SET @archive_name = null
DECLARE @7z_path varchar(100)
SET @7z_path = null
set @archive_destination_dir = @PathName --destination dir
set @7z_path = 'D:\FILES'
set @db_bkp_files_dir = right(@PathName,1) --db backup files origin
SELECT TOP(1) @archive_name = FileName FROM #tempFileList WHERE ROW_NUM = @FileIter
SET @cmd2 = @7z_path + '\7za a -t7z -mx5 -ms=off ' + @archive_destination_dir + @archive_name + '.7z ' + @archive_destination_dir + @archive_name
print @cmd2
EXEC xp_cmdshell @cmd2
--@@
SELECT TOP(1) @DelFile = 'del ' + @PathName + FileName FROM #tempFileList WHERE ROW_NUM = @FileIter
EXEC xp_cmdshell @DelFile
SET @FileIter = @FileIter + 1
END
DROP TABLE #tempFileList
【问题讨论】：
标签： sql multithreading xp-cmdshell