2.3Microsoft DNA 2000
Microsoft DNA 2000(Distributed InterNet Applications) is Microsoft is in roll out foundation of platform of Windows2000 set operating system to go up, expanding distributinging computation model, and the new distributinging computation architecture that after transforming server of Back Office series to carry distributinging computation product, releases and standard.
In server end, the application that DNA 2000 provided ASP, COM, Cluster to wait supports. Current, DNA2000 is having huge advantage on technical structure. On one hand, because Microsoft is manufacturer of operating system platform, the powerful support; that got platform of rock-bottom operating system because of technology of this DNA 2000 on the other hand, because the application of operating system platform of Microsoft is wide, the application development firm that supports this system platform is numerous, because this is in actual application, DNA 2000 got the adoption of business of numerous application development and support.
DNA 2000 is shirt-sleeve current the most advanced distributinging computation theory and thought, if general affairs is handled, but the content such as alignment of message of retractility, asynchronous, group. DNA makes development OK the server component application that is based on Microsoft platform, among them, like database general affairs communication of service, asynchronous serves to wait with safe service, offer by rock-bottom distributinging object system.
With the DCOM/COM/COM a group of people of same interest that Microsoft heads, from DDE, OLE arrives ActiveX, offerred among the foundation of development, be like VC, VB, delphi support DCOM, include OLE DB inside new database accesses a technology, as the issuance of Windows2000, the DCOM/COM/COM technology of Microsoft, on foundation of structure of DNA2000 distributinging computation, showed a brand-new distributinging component to use a model. Above all, the component of DCOM/COM/COM still introduces model of common COM(Component Object Model) . COM regards the component of Microsoft desktop system as the technology at first, the OLE application that basically is this locality serves, but the issuance as NT of Microsoft server operating system and DCOM, COM makes component part technology outspread through rock-bottom long-range support arrived to distributing applied domain. DCOM/COM/COM more among the business logic that its augment carries distributinging application to face a server. Pass the relevant service facilities of COM, manage like pool of database of laden and balanced, memory, object, component wait a moment with configuration, DCOM/COM/COM the function of COM, DCOM, MTS organic ground is consolidated together, formed the architecture of component part application with a concept, strong function. And, DNA2000 is the model of distributinging object component that onefold manufacturer provides, what developer uses is the series development tool that same manufacturer provides, tool of development of this more than combination home is more charming.
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