11/13/2022 0 Comments Full text search![]() ![]() If the old full-text catalog path is invalid, the upgrade keeps the full-text index in the same filegroup as the base table or, for a partitioned table, in the primary filegroup. Any full-text index from that catalog is placed in the new filegroup if the root path exists. This maintains the old disk I/O behavior after upgrade. However, during upgrade of any full-text catalog that contains data files, a new filegroup is created on same disk. Therefore, a new full-text catalog is not treated as a database file with a physical path. In SQL Server 2008 and later versions, a full-text catalog is a logical or virtual object that contains a group of full-text indexes. In SQL Server 2005 (9.x), each full-text index resides in a full-text catalog that belongs to a filegroup, has a physical path, and is treated as a database file. For information about setting the service account, see Set the Service Account for the Full-text Filter Daemon Launcher. This service propagates the service account information to the filter daemon host processes of a specific instance of SQL Server. SQL Server 2008 introduced a service account for the FDHOST Launcher service (MSSQLFDLauncher). A server instance uses a multithreaded process for all multithreaded filters and a single-threaded process for all single-threaded filters. The full-text filter daemon hosts are processes that safely load and drive extensible external components used for index and query, such as word breakers, stemmers, and filters, without compromising the integrity of the Full-Text Engine. For more information, see Configure and Manage Word Breakers and Stemmers for Search and Configure and Manage Filters for Search. ![]() These components are also easier to register and configure at a per-instance level. ![]() Side-by-side install means that each of the following components exists at the instance-level of SQL Server.Įach instance now uses its own set of word breakers, stemmers, and filters, rather than relying on the operating system version of these components. If the old version of SQL Server had full-text search installed, a new version of full-text search is automatically installed. Upgrade a server instanceįor an in-place upgrade, an instance of SQL Server is set up side-by-side with the old version of SQL Server, and data is migrated. ![]() SQL Server upgrades full-text search during setup, or when you attach, restore, or copy database files and full-text catalogs from an earlier version of SQL Server. ![]()
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