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Because both options involve storing state information outside a Web application's worker process, session state has to be serialized before it is sent to remote storage.Depending on how much information a developer saves in session state, the size of the serialized data can grow quite large. NET 4 introduces a new compression option for both kinds of out-of-process session-state providers.When the file, applications with spare CPU cycles on Web servers can realize substantial reductions in the size of serialized session-state data. NET 4 introduces new options for expanding the size of application URLs. NET constrained URL path lengths to 260 characters, based on the NTFS file-path limit. NET 4, you have the option to increase (or decrease) this limit as appropriate for your applications, using two new attribute. NET 4 also enables you to configure the characters that are used by the URL character check. NET finds an invalid character in the path portion of a URL, it rejects the request and issues an HTTP 400 error. NET, the URL character checks were limited to a fixed set of characters. NET 4, you can customize the set of valid characters using the new Note Note ASP.NET 4 always rejects URL paths that contain characters in the ASCII range of 0x00 to 0x1F, because those are invalid URL characters as defined in RFC 2396 of the IETF (For example, it is now possible to cache the "Top 10" pages of a site in memory, while caching pages that get lower traffic on disk.

NET 4Setting Client IDs Persisting Row Selection in Data Controls ASP.

NET 4 to start the application in a state during which the application temporarily does not accept HTTP requests. NET instantiates the type defined by the method and the method returns, the ASP. For example, you can use the new auto-start feature to initialize an application and then signal a load-balancer that the application was initialized and ready to accept HTTP traffic.

It is common practice in Web applications to move pages and other content around over time, which can lead to an accumulation of stale links in search engines. NET, developers have traditionally handled requests to old URLs by using by using the Search engines and other user agents that recognize permanent redirects will store the new URL that is associated with the content, which eliminates the unnecessary round trip made by the browser for temporary redirects. NET provides two default options for storing session state across a Web farm: a session-state provider that invokes an out-of-process session-state server, and a session-state provider that stores data in a Microsoft SQL Server database.

Some Web applications need to load large amounts of data or perform expensive initialization processing before serving the first request. NET, for these situations you had to devise custom approaches to "wake up" an ASP.

NET application and then run initialization code during the that directly addresses this scenario is available when ASP. The auto-start feature provides a controlled approach for starting up an application pool, initializing an ASP. Note IIS Application Warm-Up Module for IIS 7.5 The IIS team has released the first beta test version of the Application Warm-Up Module for IIS 7.5.

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