SQL Alias

Issue description

This check determines whether the SharePoint servers are configured to use SQL aliases. If not, it can introduce some manageability issues.

Explanation

An alias is an alternate name that can be used to make a connection. The alias encapsulates the required elements of a connection string and exposes them with a name chosen by the user. Aliases can be used with any client application. By creating server aliases, your client computer can connect to multiple servers using different network protocols, without having to specify the protocol and connection details for each one.

Aliases can be very useful for moving databases between different SQL servers and ease scaling out the SharePoint environment. We recommend that you group the databases based on the usage and purpose and define the aliases based on that. The following table can be used as an example of database distribution and grouping:

Env.  SQL Alias  Host  Port  Instance  Description 
Prod DB_P_Config_P sql01.contoso.com TCP/1433 default SharePointConfig (principal)
Prod DB_P_Service_P sql01.contoso.com TCP/1433 default SharePoint Service App databases (principal)
Prod DB_P_Usage_P sql01.contoso.com TCP/1433 default SharePointUsagedatabase (principal)
Prod DB_P_Search_P sql01.contoso.com TCP/1433 default SharePoint Search Databases (principal)
Prod DB_P_Content_P sql01.contoso.com TCP/1433 default SharePoint Contentdatabases (principal)
Prod DB_P_Config_M sql02.contoso.com TCP/1433 default SharePointConfig (mirror)
Prod DB_P_Service_M sql02.contoso.com TCP/1433 default SharePoint Service App databases (mirror)
Prod DB_P_Usage_M sql02.contoso.com TCP/1433 default SharePointUsagedatabase (mirror)
Prod DB_P_Search_M sql02.contoso.com TCP/1433 default SharePoint Search Databases (mirror)
Prod DB_P_Content_M sql02.contoso.com TCP/1433 default SharePoint Contentdatabases (mirror)

Solution

There is no supported way to change connection parameters for some databases, like SharePoint Configuration Database. Therefore, configuring SQL Server aliases before deploying SharePoint is very important. To create a SQL alias, use SQL Server Client Network Utility by clicking Start > Run > CliConfg.exe.

Additional information

Additional information can be found in the TechNet article: