When new computers are introduced or existing computers are reimaged, it is important to get them as quickly as possible into the desired state, that jobs are set up for those target computers according to their software policy.
The evaluation mechanism runs not only on a scheduled basis but also at target registration time (called "ad hoc"). Newly registered targets are evaluated when they get registered, without having to consider all other registered targets in the database. Using this approach, the scheduled evaluation frequency can be reduced to avoid the heavy evaluation operations during business hours.
Two general mechanisms exist for introducing new managed computers into CA ITCM: preregistration and regular registration.
Preregistration is performed using any of the CA ITCM user interfaces, for example, the DSM Explorer. Preregistration is also performed by Operating System Installation Management (OSIM) as part of computer reimaging.
Regular registration is performed by the engine during collection from the scalability servers.
The main difference between the two mechanisms is in the collected inventory, or the lack of it in the case of preregistration. This fact has an impact on the results of query evaluation and effectively on computer membership of dynamic computer groups. Software policies are associated with computer groups and may as part of evaluation trigger the evaluation of the associated computer group. The lack of collected inventory for preregistered computers may have an impact on their membership in dynamic groups, and the evaluation of software policies may therefore not target the preregistered computers. To address this, the configuration policy DSM/software delivery/Manager/Delay agent preregistration actions can be used to postpone the evaluation of software policies for preregistered computers until the first regular registration is performed by the engine.
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