tailieunhanh - Microsoft SQL Server 2000 Data Transformation Services- P2

Microsoft SQL Server 2000 Data Transformation Services- P2: Data Transformation Services in Microsoft SQL Server 2000 is a powerful tool for moving data. It’s easy to use, especially when you’re creating transformation packages with the DTS Wizard. But it’s also a flexible tool that you can customize to gain a high degree of control over the transformation of your data. | Many DTS developers have run into the security problem when they schedule their DTS packages. You can log on to your computer with the same user ID as the SQL Agent is using. This will allow you to test your DTS packages in the security context that will be used when the package is executed by the SQL Agent. The performance issue can be confusing because some of the DTS tasks are executed locally where the package is executing while others are executed remotely on the database server. Here are some of the tasks that are executed in the local context All the transformation tasks The Transform Data Data Driven Query and Parallel Data Pump tasks. The performance of these tasks can be significantly degraded when they are executed on one machine and the data they are processing is on another. The Execute Process task. The Execute Package task. The following list contains tasks that are executed on the database server and not on the machine where the package is executed. If you are only using these tasks you will not have performance problems caused by execution context The Bulk Insert task The Copy SQL Server Objects task The Transfer Databases task The Execute SQL task Here are some of your options for executing a DTS package on a database server instead of on your workstation when you do not have direct access to the server Use remote management software and execute the package using DTSRun. Schedule the package on the server. Make sure the SQL Server Agent has all the permissions needed to carry out the package s operation. Execute the package on the server using the OLE Automation system stored procedures or by using xp_cmdshell with DTSRun. You could do either of these from an Execute SQL task within another DTS package. Chapter 26 has more information on the solution using the OLE Automation system stored procedures. 27 A Quick Look at DTS Chapter 1 Using the DTS Object Model for Programmatic Control DTS is implemented with the Component Object Model COM . You can