Because they are physical properties, they might be subject to change. Key properties are physical properties that individually can be used to uniquely identify a resource. GUID processing issues will arise, if the GUID changes case. GUIDs are case insensitive however, the case should never vary after the GUID has been submitted to the database. As of SMS 2003 SP1, this changed-a new GUID generates a new record even if the key properties remain the same. Prior to SMS 2003 SP1, changes were allowed to records if a DDR arrived with a new GUID but with the same key properties. For the System architecture, the GUID is the string property "SMS Unique Identifier". As a result, if this flag is set for a property in a DDR, it is meaningful only if the architecture has not been created yet. The GUID property is always taken from the architecture definition in the database. Because the value of this property for a particular resource should not change from discovery to discovery, it is an artificial value that is generated by the client. If it exists in the DDR, it alone is used to match the DDR to a record in the database. The GUID (or SMSUID) definitively identifies a resource. The property should be used as the item description. The property should be used as the item name, if present. Set only the scalar value if the value is null.Ĭonfiguration Manager unique ID, usually specified in the database.Ī key property, which if present, uniquely identifies the item. Replace all array values with those from the DDR. Property Flags NameĭISCOVERY_FLAG_FULL_REPLACE DISCOVERY_FLAG_LOW_CONFIDENCE These replicated DDRs are sent up when an incoming DDR is processing and are the combination of the incoming DDR and the resource stored in the database. Even flags that can be set only in the DDR have meaning in the architecture definition in the database because these are used to set the flags on the DDRs that are replicated to a site's parent. Some flag settings can be taken only from the architecture definition in the database, some can be overwritten by settings in the DDR, and others are taken only from the DDR. The architecture definition consists of properties and their types, maximum lengths, and flag settings. If the architecture is not defined in the database, the definition is created from the setting in the DDR. In Configuration Manager, the architecture for a resource is defined in both the database and the data discovery record (DDR).
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