SS6: Online Short-Code RAID-6 Scaling by Optimizing New Disk Location and Data Migration

Thanks to excellent reliability, availability, flexibility and scalability, redundant arrays of independent (or inexpensive) disks (RAID) are widely deployed in large-scale data centers. RAID scaling effectively relieves the storage pressure of the data center and increases both the capacity and I/O parallelism of storage systems. To regain load balancing among all disks including old and new, some data usually are migrated from old disks to new disks. Owing to unique parity layouts of erasure codes, traditional scaling approaches may incur high migration overhead on RAID-6 scaling. This paper proposes an efficient approach based Short-Code for RAID-6 scaling. The approach exhibits three salient features: first, SS6 introduces $\tau $ to determine where new disks should be inserted. Second, SS6 minimizes migration overhead by delineating migration areas. Third, SS6 reduces the XOR calculation cost by optimizing parity update. The numerical results and experiment results demonstrate that (i) SS6 reduces the amount of data migration and improves the scaling performance compared with Round-Robin and Semi-RR under offline, (ii) SS6 decreases the total scaling time against Round-Robin and Semi-RR under two real-world I/O workloads (iii) the user average response time of SS6 is better than the other two approaches during scaling and after scaling.

Migration and human development in Ukraine: features of interaction and priorities of state regulation

Purpose. The purpose of the article is to substantiate theoretically the relationship between migration and human development in the system of achieving the Sustainable Development Goals, to reveal a modern understanding environment of the opportunities as a factor in shaping the migration potential, to formulate recommendations for the implementation of the state policy for human development under conditions of high migration activity of the population, relevant for Ukraine. Methodology / approach. The general scientific methods (analysis, synthesis, generalization, systematization, graphic method) and special ones (statistical analysis, comparison, organizational and managerial modeling) were the basis of the methodological approach. Current ideas in determining the competitive conditions of environment of opportunities for human development were systematized in order to generalize the theoretical foundations of the study. Statistical analysis was performed on the example of Ukraine as a migration-active country using data from international statistical platforms UNDP, IОМ, ILO, Eurostat, Worldometer. Interstate comparative analysis made it possible to substantiate the need for the formation and implementation of the state policy for human development under conditions of high migration activity of the population. Ishikawa diagram specifying the target areas and the measures algorithm of their achievement was used to determine the catalyze priorities of such a policy. Results. In the article there were made the theoretical and applied justifications for the modern understanding of migration, human development and their interaction in terms of the formation of the internal environment of opportunities in the global mobile space of competitive redistribution of human potential. The interstate comparative analysis of the main socio-economic indicators on the example of Ukraine to identify applied problems of human development of a migration-active society was conducted. The excessive gaps indicated the priority spheres of state policy for human development as a measures’ set of demographic, valeological, educational, economic, environmental and security nature, aimed at ensuring decent, socially just and active living conditions with respect for choice and movement freedom. The priorities of the state policy for human development under the conditions of high migration activity of the population were offered. They provide an opportunity to substantiate management focuses on the implementation of monitoring of human development and migration, improving the efficiency of migration capital and the welfare of the population, stimulating demographic reproduction, the formation of social unity and legal culture. Originality / scientific novelty. There were improved the theoretical and applied bases of research of relationship between human development and population migration in the context of realization of choice right and movement freedom. The methodical bases of the comparative analysis of the internal opportunities’ environment of human development of migration-active society were further developed. The method of Ishikawa diagram (Constructing a Fishbone) to specify the priorities of the state policy for human development under the conditions of high migration activity of the population was used for the first time. Practical value / implications. The content, purpose, spheres and priorities of the state policy for human development under the conditions of high migration activity of the population were substantiated. The applied recommendations for the implementation of such a policy for migration-active Ukrainian society were formulated.

Clinical And Epidemiological Aspects Of A New Coronavirus Infection (Covid-19)

Environmental change, climate warming, increasing population density, high migration activity and other factors are provoking the emergence and spread of new infections around the world. The emergence in December 2019 of diseases caused by a new coronavirus ("coronavirus disease 2019") has already gone down in history as not a disease of minor importance, but a disease of great magnitude engulfing the entire humanity. It is known that the most common clinical manifestation of the new infection is pneumonia and, in a large proportion of patients, respiratory distress syndrome. In our article we present a brief analysis and literature review of the epidemiological and epidemiological picture, in addition, we note the etiopathogenesis and some of the nuances of the disease.

The interdependence of investment development and human resources of the Volgograd region

В настоящем исследовании построена Модель взаимодействия инвестиционной сферы и трудовых ресурсов в рамках приоритетов стратегического развития Волгоградской области. Проведен сравнительный анализ динамики в 2015-2019 гг. и прогнозов развития регионального инвестирования и численности населения области до 2030 г. Естественная убыль и высокий миграционный отток «миллениумов» возрастных групп «25-29» и «20-24» выявлены причинами «старения» населения. Сделаны выводы о перспективах достижения инвестиционных целей Стратегии развития Волгоградской области. In this study, a Model of interaction between the investment sector and labor resources within the framework of the priorities of the strategic development of the Volgograd region is constructed. A comparative analysis of the dynamics in 2015-2019 and forecasts for the development of regional investment and the population of the region until 2030 is carried out. The natural decline and high migration outflow of «millennials» of the age groups «25-29» and «20-24» were identified as the reasons for the aging of the population. Conclusions are drawn about the prospects for achieving the investment goals of the Volgograd Region Development Strategy.

‘I’m Not Swedish Swedish’: Self-Appraised National and Ethnic Identification among Migrant-Descendants in Sweden

As a country of high migration, Sweden presents an interesting case for the study of belongingness. For the children of migrants, ethnic and national identification, as well as ascriptive identity, can pose challenges to feelings of belongingness, which is an essential element for positive mental health. In this article, survey data were collected from 626 Swedes whose parents were born in the following countries: Somalia, Poland, Vietnam, and Turkey. The results show that Poles significantly felt they received more reflective appraisals of ascription than any other group. However, despite not feeling as if they were being ascribed as Swedish, most group members (regardless of ethnic origin) had high feelings of belongingness to Sweden. Overall, individuals who felt that being Swedish was important for their identity indicated the highest feelings of belongingness. Further, individuals across groups showed a positive correlation between their national identification and ethnic identification, indicating a feeling of membership to both. These results mirror previous research in Sweden where individuals’ ethnic and national identities were positively correlated. The ability to inhabit multiple identities as a member of different groups is the choice of an individual within a pluralistic society. Multiple memberships between groups need not be contradictory but rather an expression of different spheres of inhabitance.

Inhabit the Change: Circular Design & Lot

To solve the problems associated with precarious contemporary housing, it is essential to intervene with structural housing reform. Therefore, it is necessary to start from semantics and read space on the one hand, as a moment where history, traditions and culture meet; on the other hand, as a key to overcome obstacles and general obsolescence.The state of the art includes: repetition of self-built and unregulated low-quality typologies, high migration rate, and socio-economic changes; the consequences are: low-quality buildings, overcrowded or uninhabited urban centers, obsolete spatiality. Today, the challenge is to design in a short time and with high qualitative standards, without giving in to hypertechnology but finding a balancing strategy. It is a matter of anticipating what cannot be expected, and responding to the multitude of ever-changing needs inherent to an atypical user.“Inhabiting” in this perspective must be increasingly “smart and sustainable”. This is done through interactive design, which increasingly uses digitized services and connects objects and people. The goal is to move towards DfD, «Design for Disassembly», through “change” as a paradigm, and the solution is in our homes.

The positive externalities of migrant-based TB control strategy in a Chinese urban population with internal migration: a transmission-dynamic modeling study

Background Large-scale rural-to-urban migration has changed the epidemiology of tuberculosis (TB) in large Chinese cities. We estimated the contribution of TB importation, reactivation of latent infection, and local transmission to new TB cases in Shanghai, and compared the potential impact of intervention options. Methods We developed a transmission dynamic model of TB for Songjiang District, Shanghai, which has experienced high migration over the past 25 years. We calibrated the model to local demographic data, TB notifications, and molecular epidemiologic studies. We estimated epidemiological drivers as well as future outcomes of current TB policies and compared this base-case scenario with scenarios describing additional targeted interventions focusing on migrants or vulnerable residents. Results The model captured key demographic and epidemiological features of TB among migrant and resident populations in Songjiang District, Shanghai. Between 2020 and 2035, we estimate that over 60% of TB cases will occur among migrants and that approximately 43% of these cases will result from recent infection. While TB incidence will decline under current policies, we estimate that additional interventions—including active screening and preventive treatment for migrants—could reduce TB incidence by an additional 20% by 2035. Conclusions Migrant-focused TB interventions could produce meaningful health benefits for migrants, as well as for young residents who receive indirect protection as a result of reduced TB transmission in Shanghai. Further studies to measure cost-effectiveness are needed to evaluate the feasibility of these interventions in Shanghai and similar urban centers experiencing high migration volumes.