ASYMMETRIC DISTRIBUTED LOCK MANAGEMENT IN CLOUD COMPUTING

Cloud computing have become part of our daily lives. They offer a dynamic environment for costumers to store and access their data at any time in any location. The developments of social networks have led to the necessity to build a solution which is easily accesible and available when required. Cloud computing provide a solution that does not depend on the location and can offer a wide range of services, while being free from failure and errors. Although there is an increase in the usage of the cloud storage services, there is still a significant number of aspects such as instant servers failures, network partitioning and natural disasters that require to be carefully addressed. Another important point that is vital for a sustainable cloud is the implementation of an algorithm which will coordinate and maintain concurrent access and keep shared files free from errors. One of the main approaches to overcome these problems is to provide a set of servers which will act as a gateway between clients and storage nodes. In this thesis we propose a new approach which provides an alternative solution to the main problematics related with cloud storages. The approach is based on multiple strategies for eliminating the problem of node failure and network partitioning while providing a complete distributed environment. In our approach, every server acts as a master server for its own requests and can provide service to its clients without interacting with other master servers. The concurrent access is maintained in an asymmetric way through our lock manager algorithm with the least communication among other master servers. According to the state of a specific file, master server can execute any received request without communicating with other master servers and only when additional information is required does further communication occur. In our approach the network partitioning or failure of one or more master servers has no effect on the other part of the cloud. To improve availability, we associate every master server with a failover server which takes up the duty of a master when the master server fails or becomes obsolete. To measure the performance of our approach we have performed various tests and the results are presented in detailed graphs

The Equality Act 2010 and empty diversity : neoliberal legislation and inequality in the lives of trans* and sexgender nonconforming people

This thesis explores how effectively equality and diversity legislation in the UK offers recognition and protection to trans* and sexgender nonconforming people by engaging with their contemporary experiences. In order to explore these dynamics I give a genealogical and multidisciplinary context to my work. More specifically, I trace the ways in which the development of trans* and sexgender nonconforming discourses impacts on the evolving self-understanding of my research subjects. Finally, I also analyse the implications of my findings for particular forms of legally focused activism. The thesis makes a critical examination of the much commented-on increase in trans* and sexgender nonconforming people’s visibility and social inclusion in the 21st century. In order to undertake such critique I theorize the impact of structural socioeconomic and cultural changes that have taken place in the context of neoliberal governmentality, including the developments in information technologies. I focus on important issues of materiality and political economy to analyse how the neoliberal logic of inclusion of previously discriminated against populations according to their socio-economic fungibility – i.e. their ability to participate in the market – necessarily creates new forms of exclusion and marginalization. This thesis produced a critical examination of the nature of diversity itself in a neoliberal age, focusing in particular on how the valorization of a particular form of empty diversity – i.e. a depoliticized, instrumental and commodified recognition of difference - is emblematic of the delimitations of the effects of the neoliberal project. I contend that the forms of protection grounded in neoliberal understandings of ‘equality’ work to mask the structurally unequal and iniquitous effects of legislation, even if they represent an improvement in relation to the previous lack of recognition. In particular the Equality Act 2010 can be seen as entrenching inequality and discrimination, rather than promoting genuine social and economic equality, by only protecting more ‘legible’, ‘fungible’ and normative experiences of trans* expression

Multi-Level Planning And Development Administration In Botswana

RUP occasional paper