Part IV Integrating Supporting Technologies in .NET

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Part IV Integrating Supporting Technologies
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Also, it is possible that you may need to cache some document properties. Remember that properties are additional document attributes, such as author name, date of creation, and so forth. These properties are indexed along with the document, but some properties cannot be directly indexed and must be stored in the property cache so the Indexing Service can use them. A common example is meta tags in an HTML document. To use meta tags, you would need to manually cache them. To perform this action, expand Indexing Service in the left pane and click the Properties folder. A list of properties appears in the right pane, shown in Figure 16-14.
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Figure 16-14: Indexing Service properties
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To cache a desired property, right-click the property in the right pane and click Properties. On the Property tab, simply click the Cached check box.
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You should not cache properties unless you are certain there is a need. Some cached properties can cause a performance problem with the Indexing Service.
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Managing the Indexing Service
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Fortunately, managing the Indexing Service is very easy. Once you have the Indexing Service up and running, it takes care of itself by automatically rescanning documents and incorporating changes into the index. In a nutshell, there shouldn t be much you need to do, but I ll point out a few possible housekeeping tasks.
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16 Implementing Distributed File System and Indexing Service
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If you select the Indexing Service in the left pane and click the Action menu (or just right-click it), you can access the service s properties sheets. You see a Generation and a Tracking tab. By default, the Indexing Service indexes files with unknown extensions, and it generates abstracts, with a maximum abstract character size of 320. You can change these features on the Generation tab if you like, but as a general rule, the default settings work well. The Tracking tab simply tells you that the inheritable setting of Add Network Share alias automatically is enabled, and it should remain enabled so that aliases are indexed as well. The settings configured on these tabs are automatically inherited by your catalogs, but you can change this by accessing a catalog s properties sheets and manually changing the settings. As mentioned previously, Indexing Service scans documents automatically and updates catalogs automatically. However, you can manually rescan a directory if you feel there may be errors or you want the changes immediately updated. To perform this action, simply select the Directories folder in the left pane, then rightclick the desired directory in the left pane, point to All Tasks, and choose either Rescan (Full) or Rescan (Incremental). A full scan completely reexamines the directory while an incremental scan looks only for changes in the directory. Finally, if you are having problems with Indexing Service, there is an Indexing Service object in Performance Monitor you can use to attempt to isolate the cause of performance problems. Also, you ll find a list of error code messages for Indexing Service in the Windows 2000 Help files.
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This chapter explored two Active Directory supporting technologies Distributed File System and Indexing Service. Dfs makes the network transparent to your users by creating a shared folder hierarchy that users can use to view and locate the desired shared folder. Users are transparently redirected to the actual server and shared folder so that knowledge of the network topology is not necessary. Dfs supports both standalone and Active Directory integrated options. Also, you can use the Indexing Service to index files and folders on your local machine or Web directories. The Indexing Service enables users to perform full text searches in order to locate desired files.
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Connecting Exchange Server and the Active Directory
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xchange Server is Microsoft s enterprise messaging and groupware product. Through Exchange Server, enterprise environments can implement corporate e-mail and a number of related services, such as newsgroups. As the newest version of Exchange Server, Exchange 2000 works natively with the Active Directory. In this chapter, we explore both Exchange 5.5 and Exchange 2000 and how these two products can integrate with the Active Directory. This chapter focuses on connecting the two products together, so I assume you have some previous Exchange knowledge. If you have an existing NT network running Exchange 5.5, you ll find the information in this chapter most helpful, and if you are considering implementing Exchange 2000, you learn how it integrates with the Active Directory.
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