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Before you start changing categories, however, it s important to understand the ramifica tions. Changing a category doesn t modify the category for items to which it has already been assigned. If you remove the Foes category from your Master Category List and replace it with Friends, any items previously assigned the Foes category still have that category assignment Outlook won t automatically change them to the new category. However, Outlook also doesn t delete the category assignments of items with categories that are no longer in your Master Category List. Because the old categories remain associated with the item, you can still search based on the old category names. Therefore, when you change a cat egory, you should search for all items using the old category and then change those items to assign the new category. 110

There are no data conflicts with read operations, because read operations are, by definition, read-only. However, problems can still occur with read operations in occasionally connected smart clients. You should cache any data that needs to be read on the client before it goes offline. This data can become stale before the client goes online again, leading to inaccurate data on the client and problems when synchronization occurs with the server. For more information about dealing with stale data, see Handling Stale Data earlier in this chapter.

isolation is implemented due to the increased number of processes running on the system and the additional interprocess communication overhead incurred when the driver calls spooler functions, and vice versa. additional temporary performance degradation might also be incurred when a new process is created or needs to be recycled. This performance degradation is much more evident when there are many drivers running in Isolated mode than when using Shared mode.

he printer Driver isolation feature of Windows 7 and Windows Server 2008 R2 allows some print driver functionality to be executed in a process, or processes,

separate from the print spooler. By invoking print drivers in a separate process, problems associated with faulty print drivers are isolated from the print Spooler service and will not cause it to fail. In addition, the ability to isolate print drivers from each other further increases the reliability of the printing system. prior to Windows 7 and Windows Server 2008 R2, the failure of third-party drivers was a leading print server support issue at Microsoft. The crash of a driver loaded into the print spooler process would crash the process, leading to an outage of the entire printing system. The impact of a spooler crash on a print server is particularly significant because of the number of users and printers that are typically affected. In addition to the benefit of improving overall printing system stability, this new feature provides a means to:

Isolate new drivers for testing and debugging without affecting the spooler. Identify which drivers have been causing spooler crashes.

Think of the Master Category List as a list that simplifies the assignment of cat egories by allowing you to pick preset categories from the list rather than entering them manually each time. The category text itself is associated with the item, so changes to the Master Category List don t affect the items to which categories have been assigned.

The printer Driver isolation feature is not intended to isolate print driver functionality from applications other than the print spooler. If an application loads a print driver into its own process space and the driver crashes, then the application might crash as well. For example, if an application directly calls into a printer s configuration module to set or get print capabilities, a failure in the configuration module will crash the application itself. In this scenario, the application is directly loading the printer driver into its process space. If the print driver s rendering module is loaded in the process space of the application, a failure in the driver will again cause a crash of the application itself.

Print Management is a snap-in for the MMC that administrators can use to manage multiple printers and print servers on a network . Using the Print Management console, an administrator can manage hundreds of print servers and thousands of print queues on Microsoft Windows 2000 Server, Windows Server 2003, and Windows Server 2008 .