Plan for the site database for System Center Configuration Manager
Applies to: System Center Configuration Manager (Current Branch)
The site database server is a computer that runs a supported version of Microsoft SQL Server. SQL Server is used to store information for Configuration Manager sites. Each site in a Configuration Manager hierarchy contains a site database and a server that is assigned the site database server role.
For central administration sites and primary sites, you can install SQL Server on the site server, or you can install SQL Server on a computer other than the site server.
For secondary sites, you can use SQL Server Express instead of a full SQL Server installation. The database server must, however, be run on the secondary site server.
For SQL Availability Group usage the Database Recovery Model must be set to FULL
For non-SQL Availability Group usage the Database Recovery Model must be set to SIMPLE
Further information on SQL Recovery Modes can be found in Recovery Models (SQL Server).
The following SQL Server configurations can be used to host the site database:
The default instance of SQL Server
A named instance on a single computer running SQL Server
A named instance on a clustered instance of SQL Server
A SQL Server AlwaysOn availability group (beginning with version 1602 of System Center Configuration Manager)
To host the site database, the SQL Server must meet the requirements detailed in Support for SQL Server versions for System Center Configuration Manager.
Remote database server location considerations
If you use a remote database server computer, ensure that the intervening network connection is a high-availability, high-bandwidth network connection. The site server and some site system roles must constantly communicate with the remote server that is hosting the site database.
The amount of bandwidth required for communications to the database server depends on a combination of many different site and client configurations. Therefore, the actual bandwidth required cannot be adequately predicted.
Each computer that runs the SMS Provider and that connects to the site database increases network bandwidth requirements.
The computer that runs SQL Server must be located in a domain that has two-way trust with the site server and all computers running the SMS Provider.
You cannot use a clustered SQL Server for the site database server when the site database is co-located with the site server.
Typically, a site system server supports site system roles from only a single Configuration Manager site. You can, however, use different instances of SQL Server, on clustered or non-clustered servers running SQL Server, to host a database from different Configuration Manager sites. To support databases from different sites, you must configure each instance of SQL Server to use unique ports for communication.
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