File Replication Service (idfilerep)
The File Replication Service (idfilerep) receives data from a master instance in a replication environment, and is used in conjunction with the updinst utility to synchronize files and registry keys between multiple instances.
When updinst is used from the master instance, the File Replication Service adds, modifies, and removes files and registry settings on the server. Configuration options for file replication are explained further in this section.
Caution
Do not attempt to replace Database Service files using updinst or the File Replication Service. Updating the Database Service and related files (such as iddbmssql.dll) must be done manually on all instances. This only applies to the Database Service service. All other services can be updated using the File Replication Service. To update the Database Service files manually, shut down all services on the instance, back up all services, and then replace the Database Service files.
You must set up a database replication environment in order for the File Replication Service to identify replication servers with which to synchronize files. See Recovery .
The File Replication Service uses the updinst utility to initiate the file replication process.