Scalability resilience framework using application-level fault injection for cloud-based software services

This paper presents an investigation into the effect of faults on the scalability resilience of cloud-based software services. The study introduces an experimental framework using the Application-Level Fault Injection (ALFI) to investigate how the faults at the application level affect the scalability resilience and behaviour of cloud-based software services. Previous studies on scalability analysis of cloud-based software services provide a baseline of the scalability behaviour of such services, allowing to conduct in-depth scalability investigation of these services. Experimental analysis on the EC2 cloud using a real-world cloud-based software service is used to demonstrate the framework, considering delay latency of software faults with two varied settings and two demand scenarios. The experimental approach is explained in detail. Here we simulate delay latency injection with two different times, 800 and 1600 ms, and compare the results with the baseline data. The results show that the proposed approach allows a fair assessment of the fault scenario’s impact on the cloud software service’s scalability resilience. We explain the use of the methodology to determine the impact of injected faults on the scalability behaviour and resilience of cloud-based software services.

Catch-up and Time shift as ways to use copyright and related rights

Zerov K. Catch-up and Time shift as ways to use copyright and related rights. Based on the provisions of the current Ukrainian legislation and the legislation of the European Union, the legal nature of the Catch-up right and the Time Shift right is investigated, and their place among other ways of using objects of copyright and related rights is determined as a combination of the right of reproduction and the right of communication to the public. The right of reproduction is applicable in the case of Catch-up right and Time Shift because when recording on the server of the software service provider of the broadcasting and (or) broadcasting program, theirnew fixation is created. The right of communication to the public is applicable in the case of Catch-up right and Time Shift because it combines «an act of communication» — uses a specific technical means different from that of the original communication, and is aimed at the «public.» In the case of Catch-up right and Time Shift, it is irrelevant whether the potential recipients access the communicated objects through a one-to-one connection because this technique does not prevent a large number of persons from having access to the same work at the same time.It was determined that these rights are granted to program service providers and other persons who retransmit programs of a broadcasting organization based on license agreements, which are paid and additional to the main contract for retransmission of a broadcasting organization's program. Moreover, the rights to Catch-up and Time Shift are limited in time (usually up to 7 calendar days for Catch-up and 24 hours for Time Shift from the moment of live broadcast). In the absence in the agreement of the conditions regarding the type of license, territory, and term of the agreement, the general provisions set out in Part 4 of Art. 1109, part 7 of Art. 1109 and part 3. Art. 1110 of the Civil Code of Ukraine, are appliable respectively. But usually these conditions may be different and more limited from the main license agreement for retransmission, for example Catch-up and Time Shift are geo-targeted to a specific area.Key words: Catch-up, Time Shift, communication to the public, reproduction, IPTV