- Identity with Windows Server 2016：Microsoft 70-742 MCSA Exam Guide
- Vladimir Stefanovic Sasha Kranjac
- 226字
- 2021-07-02 13:40:44
Global catalogs
The global catalog is a partial read-only copy of all objects in the forest. The purpose of the global catalog is to speed up searching for objects stored on different domains in the forest. Within a single domain, each query for objects is sent directly to the domain controllers in that domain, but if you want to include results from other domains in the forest, the query needs to be sent to the global catalog server. The global catalog server is the domain controller that hosts the global catalog, which, by default, is the first deployed domain controller in the forest root domain. The global catalog maintains the subset of attributes that are useful in cross-domain searches, such as givenName, displayName, and the mail.
It's highly recommended that the global catalog server and the infrastructure FSMO role are on separate servers. The infrastructure master communicates regularly with the global catalog server in order to keep cross-domain references up to date. When the infrastructure master detects that a cross-domain reference is out of date, it obtains the updated data from the global catalog server and replicates that to other DCs in its own domain. This process works well, but only in cases where the global catalog and the infrastructure master aren't on the same server.
You can find more information at https://support.microsoft.com/en-us/help/248047/phantoms-tombstones-and-the-infrastructure-master.