Major New Features

The following new features are included in AOLserver Version 2.3

Feature	Where Documented
Pre-defined tags for ADPs: Several new tags allow you to display text conditionally depending on the browser or the version of the browser being used. See also: the ns_register_adptag Tcl function and the Ns_RegisterAdpCmd C function, which allow you to register your own ADP tags.	Tcl Developer's Guide: page 14 and page 174 C Developer's Guide: page 230
Quotas for pageroot: A quota can be set for the size of the pageroot and its descendants. There are also new Tcl and C functions for checking and enforcing the quota.	Administrator's Guide: see QuotaSize parameter on page 69 Tcl Developer's Guide: page 172 C Developer's Guide: page 29, page 65, page 159, page 215, page 220, page 248, and page 346
Static file caching: AOLserver supports caching of HTML pages and all simple (static) files. You can minimize the number of times each file must be read from disk by using static file caching, allowing pages to be served more efficiently.	Administrator's Guide: page 87, page 89, and page 91
Tcl caching: AOLserver supports the caching of Tcl scripts that reside in a Tcl module. You can configure Tcl caching in the nscache module, and there is a new [ns/server/servername/module/nscache/tcl] configuration file section. The new ns_cache function in Tcl allows you to create, destroy, and modify a Tcl cache, as well as evaluate entries and check evaluation statistics on the Tcl cache.	Administrator's Guide: page 87, page 89, and page 92 Tcl Developer's Guide: page 88
Select loop serving of simple files: You can now enable select loop serving of simple files. If select loop serving is enabled, static data (files and files from cache) are served from a single thread in a single loop based on the select() system call, which should improve performance on most systems.	Administrator's Guide: see SelectLoop* parameters on page 59 and page 69
Virtual hosting: The new nsvhost module lets you exploit the HTTP Host header, which identifies the host that was looked up by the browser, and serve different content based on this header.	Administrator's Guide: page 87, page 111, and page 127
New nsdynamo module: The nsdynamo module provides a communications interface to ATG's Dynamo Server.	Administrator's Guide: page 87, page 94, and page 129
New nsservlet module: The nsservlet module provides an interface to the Java Servlet API that enables support for server-side "applets" called servlets.	Administrator's Guide: page 87, page 104, and page 131

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