SCCM Global Data , Site Data and File\Database Replications

SCCM Global Data and Site Data

Global data. Global data refers to administrator-created objects that replicate to all sites throughout the hierarchy, although secondary sites receive only a subset of global data, as global proxy data. Global data includes software deployments, software updates, collection definitions, and role-based administration security scopes. Administrators can create global data at central administration sites and primary sites.

Site data. Site data refers to operational information that Configuration Manager primary sites and the clients that report to primary sites create. Site data replicates to the central administration site but not to other primary sites. Site data includes hardware inventory data, status messages, alerts, and the results of query-based collections. Site data is only viewable at the central administration site and at the primary site where the data originates. Site data can be modified only at the primary site where it was created.

File-based replication

Configuration Manager uses file-based replication to transfer file-based data between sites in your hierarchy. This data includes applications and packages that you want to deploy to distribution points in child sites, and unprocessed discovery data records that are transferred to parent sites and then processed.

File-based communication between sites uses the Server Message Block (SMB) protocol on TCP/IP port 445. You can specify bandwidth throttling and pulse mode to control the amount of data transferred across the network, and you can use schedules to control when to send data across the network.

Database replication

Configuration Manager database replication uses SQL Server to transfer data, and to merge changes that are made in a site database with the information stored in the database at other sites in the hierarchy. Note the following about database replication:

·         All sites share the same information.

·         When you install a site in a hierarchy, database replication is automatically established between the new site and its designated parent site.

·         When the site installation finishes, database replication automatically starts.

To replicate data between sites, Configuration Manager uses its own database replication service. The database replication service uses SQL Server change tracking to monitor the local site database for changes, and then replicates the changes to other sites by using SQL Server Service Broker (SSB). By default, this process uses TCP/IP port 4022.

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