What's New in Report Server Architecture and Tools
SQL Server 2008 Reporting Services (SSRS) introduces a new report server architecture and revised tools for deploying and managing a report server instance.
Report server architecture is fundamentally changed in SQL Server 2008 by the removal of Internet Information Services (IIS) dependencies and the consolidation of applications into a single service. The new architecture embeds HTTP server capabilities into the report server itself, allowing you to run a report server as a true a middle-tier application, separate from Web front-end applications used to access it. The report server also includes a new hosting layer to authenticate users, manage memory and internal processes, and support end-to-end tracing and logging.
Reporting Services includes a complete set of tools for configuring and managing a report server installation. The tools have been redesigned to support a distinct set of tasks that no longer overlap in functionality. New capabilities are added to some tools, whereas other capabilities have been removed to eliminate redundant tasks. If you are already familiar with report server tools and want to know how the tools changed from the previous release, see Reporting Services Backward Compatibility and Behavior Changes in SQL Server Reporting Services.
This release of Reporting Services introduces data-driven subscriptions and job management for report servers running in SharePoint integrated mode. You can define data-driven subscriptions for reports that you have deployed to a SharePoint library by using the new subscription definition pages that are provided by the Reporting Services Add-in for SharePoint Technologies. The add-in also provides new job management pages at the site level to view and cancel reports that are in progress. Note that you must install or upgrade to the Reporting Services Add-in to access the new report server functionality from your SharePoint site. The add-in installs the application pages that provide the graphical user interface to the SQL Server 2008 report server that supports data-driven subscriptions and job management for SharePoint users.