Abstract: The subject of the research is the new principles of building globally distributed computer and computing systems for creating a software infocommunication switch providing telephony services, sending facsimile, short and multimedia messages services, via packet data transmission channels, and also storing user files. The object of scientific research is the globally distributed computing system of RingCentral (USA), which began to be created from the beginning of the company's founding in 1999 and is technologically constantly evolving at the present time. The author reveals in detail the main criteria for testing the hardware environment of the implemented computer infrastructure during the transition to the distributed computing model. The creation of a globally distributed computing system architecture for an information and communication software switch was a decisive factor in the development of computer systems in the provision of universal information and communication services. The exchange of the obtained scientific knowledge at specialized conferences and seminars showed that the constructed model of information and communication services is the most modern from the technological point of view of the proposed architecture.

Abstract: The subject of scientific research presented in this publication is a logical model and computer-computing infrastructure, including specialized software used to build a management database, determine, record and verify versions of deployed software and configurations of all computing elements, as well as a description of the relationships between these elements in globally distributed cloud information systems. The object of this study was chosen globally-distributed cloud information production infrastructure with numerous service equipment and large data flows of the company RingCentral (USA). The author of the article examines in detail the main aspects of the organization of the effective maintenance of the information cloud environment consisting of tens of thousands of virtual servers. Special attention is paid to the developed methods of integration of disparate computing systems containing reliable data about the information environment, but not intersecting among themselves. The developed methods for constructing a database of configuration parameters management in information systems were presented in the form of reports and presentations at international scientific seminars and conferences, where the scientific novelty and effectiveness of the proposed methods for servicing the globally distributed cloud information processing complex were noted. The use of the developed methods in RingCentral, has reduced the current costs associated with the organization of maintenance of the globally distributed information complex as a whole by thirty percent.

Abstract: The subject of the research is new software releases and subsequent restrictions on the intensity of installing new software releases for modern cloud services, which are complex globally distributed computing systems that require continuous maintenance. The object of the research is the globally distributed cloud computing system of RingCentral (USA). The authors consider in detail the important criteria for business in the transition to a cloud service, including the levels of availability of modern information services for globally distributed computing systems, taking into account the growing number of changes in them. The article proposes a new method of experimental calculation of the maximum intensity of installation and software updates in cloud information systems without degrading the quality of information services. With the increasing degree of functional decomposition of cloud systems and the number of servers, the issue of assessing the intensity of software changes for globally distributed computing systems becomes urgent. The proposed method allowed the authors to efficiently serve RingCentral's global cloud information system without interruption in its operation.