User manual MACROMEDIA COLDFUSION 5 INSTALING AND CONFIGURING SERVER

[. . . ] Installing and Configuring ColdFusion Server ColdFusion Server 5 Macromedia, Inc. Copyright Notice © 2001 Macromedia Inc. This manual, as well as the software described in it, is furnished under license and may be used or copied only in accordance with the terms of such license. The content of this manual is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by Macromedia Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in this book. [. . . ] Cached queries allow retrieval of result sets from memory rather than through a database transaction. Because queries reside in memory, and query result set sizes differ, you must provide a limit for the number of cached queries. Limit cached database connection inactive time to [n] minutes Limit the maximum number of cached queries on the server to [n] queries 72 Chapter 5 Basic ColdFusion Server Administration Client Variables Client variables let you perform tasks like determining the IP address of a site visitor's Web browser. Using information from client variables, you can customize page content for individual users. You enable client variable default settings in ColdFusion Server on the Client Variables page of the Administrator. ColdFusion Server lets you store client variables in these ways: · The operating system registry · As cookies in users' Web browsers · In a data source. Note You can override settings specified in the Client Variables page using the attributes of the cfapplication tag. For more information, see the Developing ColdFusion Applications book. The following table compares these storage options: Storage Type System registry Advantage Disadvantage · Possible restriction of the · Simple implementation registry's maximum size limit on · Good performance Windows NT and WIndows 2000 · Registry can be exported in the Control Panel easily to other systems · Integrated with the host system: · Server-side control not practical for clustered servers · Solaris, Linux, and HP-UX registries are text files. Their registries deliver slow performance and low scalability. · Users can configure browsers to disallow cookies · ColdFusion Server limits a cookie's data to 4 KB · Netscape Navigator allows only 20 cookies from one host; ColdFusion Server uses three cookies to store read-only data, leaving only 17 cookies available · Requires database transaction to read/write variables · More complex to implement Browser cookies · Simple implementation · Good performance · Can be set to expire automatically · Client-side control Data source · Can use existing data source · Portable: not tied to the host system or operating system Client Variables 73 Note If you use the registry to store client variables, ensure that enough memory is allocated for it. To enable client variable storage in the registry as the default: 1 2 In the Client Variables page, select Registry. To display a page in which to enable the automatic deletion of variables that have not been used for a specified number of days, click Registry. Click Submit Changes. To enable client variable storage in cookies as the default: In the Client Variables page, select Cookie. Click Submit Changes. To enable client variable storage in a data source as the default: 1 2 3 In the Client Variable page, select a data source in the drop-down list. The Add/Edit Client Store page for your data source displays. On the Add/Edit Client Store page, select options for the data source, as described in the following table. If you do not want to make changes, return to the Client Variables screen using one of the arrows on the page. Option Description Purge data for Enable this option to periodically purge client data that has not clients that been accessed in a specified number of days, and enter a remain number. unvisited for [n] days Disable global Enable this option to prevent ColdFusion Server from updating client variable client variables for every page request. When updates are updates disabled, ColdFusion Server only updates global client variables when they are created and when they are changed. Disabling updates helps improve the performance of application pages. Create Client database tables Enable this option only when you configure a data source for client variable storage the first time. ColdFusion Server creates the tables necessary for client variables. [. . . ] The ClusterCATS Explorer resides at the corporate headquarters behind a firewall with a direct connection to the Internet. You must open and configure the appropriate communication ports on your firewalls to allow server to server communication in a distributed setting and server to client communication. Note You must open both ports on all affected firewalls. These ports include the following: · Port 9123 (for TCP and UDP access) Opening port 9123 on your firewall allows multiple, distributed cluster of servers residing in different locations to communicate with one another across firewalls. · Port 9129 (for TCP and UDP access) Opening port 9129 on a firewall allows the ClusterCATS Explorer to communicate with multiple, distributed clusters of servers across firewalls. Before You Install ColdFusion Server 145 Analyzing Web server content All Web servers, virtual server, or Web sites in the same cluster must have identical content. [. . . ]