High availability Essay Example for Free

High availability Essay In the advent of the computer age, the growth of the internet has also necessitated the development of technologies that are not only able to cope with the demands of users but also within the limitations of current hardware. With multitasking having evolved into the norm, the availability of media and applications online has made it increasingly important to provide  high availability (Marcus 2003). The mission-critical applications that have surfaced on the internet have placed added pressure to make sure that highly available services are always ready. As such, this brief discourse will attempt to discuss the current state of high availability technology as well as any recent trends or variations that have surfaced. High Availability, as the term suggests, refers to systems or instruments in information technology that are not only continuously available but also continuously operational for long periods of time (Marcus 2003). The term availability is used to refer to the access that the users or members of user community have to the system. This type of access or ability can include anything from uploading files, to changing entries, updating works or even just scanning previous works (Marcus 2003). The failure to access the system results in downtime or unavailability. An example of this would be the manner by which community users like to be able to use Facebook to chat, watch videos, update links and upload pictures all at the same time. With a network that has Low Availability, the users will occasionally experience failures with regard to logging in or accessing different functions of the website because of the necessary downtime for system updating and maintenance (Ulrick 2010). This downtime can be prejudicial for a website or an internet application because it reduces the desirability of the technology. With the pressure on to provide complete and persistent accessibility, companies have tried to achieve the optimum â€Å"100% operational† or â€Å"never failing† Availability Status . One way of providing almost constant availability (High Availability) is by creating clusters. These computer systems or networks consist of several pieces that act as back-ups or failover processing mechanism that store data and allow for access. This includes the Redundant Array of Independent Disks (RAID) or the Storage Area Network (SAN), which are used as back up storage devices to ensure constant availability (Marcus 2003). These systems, however, are constantly evolving and changing depending on the technology that is available and developed such as systems that have solid membership administration, consistent group communication sub-systems, quoram sub-systems, and even concurrent control sub-systems, among others. By creating a clustered computer system or network, backups are created in the form of redundancies for both hardware and software. This is achieved by forming or grouping several independent nodes with each of them simultaneously running a copy of the operating system (OS) and the application software (Marcus 2003). Whenever there is a failure in any of the nodes or when daemon failures occur, the system can quickly be reconfigured and the existing workload is then passed on to the other available or functional nodes within the cluster. Thus, there is always, theoretically, one system that is available and running to handle the services and access for the user community. It was reported in 1996 that the lost revenue and productivity due to downtime amounted to over US$ 4. 54 billion for American businesses alone (IBM 1998). As such, High availability has been consistently upgrading and evolving to be able to address this issue. The recent development include the creation of High Availability Clusters (HA Clusters or Failover Clusters). The concept of this is that it provides greater High Availability by operating several computer clusters at the same time. While this applies the same concept as High Availability, it attempts to create several failover systems and clusters that cater to this. It does, however, retain the same concept of constant monitoring to make sure that the systems are running as programmed and as planned. Recent research in this field has shown that there is also a diminishing return principle that can be applied. Up until recently, it was thought that by creating an expansive network and creating several clusters, the availability could be increased proportionally. However, there are findings that show that High Availability decreases when there are more components that are added to the system. This means that instead of improving the process it is instead undermined by the installation of additional components. The reason for this, according to Chee-Wei Ang, is that the more complex a system the more potential failures arise (Ang 2007). Since there are more systems to monitor, it becomes more difficult to point out exactly where the problem is. This can be compared to a complicated plumbing system wherein it becomes difficult to find the source of the leak. Though it has been argued by experts that a number of highly available systems utilize a simple design architecture which features high quality multipurpose systems. Yet even with this, it cannot ignore the basic fact that theses systems still require constant upgrading, patching and maintenance. The recent developments in this field include the creation of more advanced systems designs that streamline and facilitate the maintenance of systems without the need for compromising the availability. This has been achieved by doing load balancing and more advanced failover techniques. It is admitted, however, that while there are several developments, like all hardware devices these systems are also prone to human error and typical wear and tear which cannot be avoided though their effects can be mitigated by the introduction of more effective and efficient means.

Freedom of Expression on the Internet Essay -- Freedom of Speech

I.Introduction This paper addresses whether we should censor or block access to websites with controversial material. It looks at the issue from several sides: The relevant US laws that are in place, how censorship is used at the university and corporate levels, how other countries are attempting censorship, and finally what I feel about the topic. Given all that I have read in preparing this paper, I have come to the conclusion that without a set of globally-accepted rules, we should not be censoring the Internet except where these rules are being broken. We could perhaps get agreement for those things that are obviously illegal and unethical (child pornography), but what about other areas such as gambling (is it legal but unethical or visa versa?). There would be very few rules we could agree upon if 100% global agreement is a requirement, and I believe it is. II. America's View A. The Laws The United States government has enacted (or attempted to enact) several laws regarding freedom of speech and the internet. A short overview of these follows. 1.The First Amendment Given how short the First Amendment is, it has caused a surprising amount of controversy and an untold number of new laws and regulations. The text simply states â€Å"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.†[i] The First Amendment has been enforced at different levels depending on the type of media itself. Television and radio are both broadcast media and are under strict government regulation as to cont... ...8520&key2=7604425701&coll=portal&dl=ACM&CFID=16081397&CFTOKEN=88949163 [xxxi] Ministry of Information, Communication and the Arts, Working Together Towards a Responsible and Vibrant Society, 2003, 08 Feb 2004, http://www.mita.gov.sg/pressroom/press_030908.pdf [xxxii] Amnesty International, People's Republic of China Controls tighten as Internet activism grows, 28 January 2004, 08 Feb 2004, http://web.amnesty.org/library/Index/ENGASA170012004 [xxxiii] Julie Hilden, The First Amendment and the Internet, Why Traditional Legal Doctrines Apply Differently In Cyberspace 2002, 24 Jan 2004, http://writ.findlaw.com/hilden/20020416.html [xxxiv] Tina Inzerilla, â€Å"Re: hello there†, email to the author, Feb 2004 [xxxv] Jennifer Rast, The UN Plan to Take Over the Internet, Contender Ministries, 10 Jan 2004, 11 Feb 2004, http://www.contenderministries.org/UN/wsis.php

Pillars of education

Learning to managerial education specialized education Should be given and Is Provides the opportunity available to all despite to study a small number differences of race, of of subjects in depth, place and of physical and focused on training to economic condition prepare students for their respective workplace 3. Mineral educational is in this field that a child learns how to: Think- something that should be learned from parents and then teachers which include the process of robber-solving and abstract thought Concentrate- ability to focus or to give full attention to something Acquire memory skills- skills to associate one object or experience to another 4. Peccadillo educational Is In this discipline that an individual: Is encouraged for greater intellectual curiosity Could sharpen his critical faculties Enables an individual to develop their own independent judgment on the world around them 5. Learning to know is the concept of basic and general education with the addition of op portunities to work on specific areas that continue o develop with regards to the rapid change In science, technology and socio- economic activities.General education Specialized education 6. II. Learning to do Adjusting Education for the 21st Century Occupation There is a great shift of occupation in the coming years thus learning should also be adjusted and modified in order for an individual to cope with change Learning to do tackles not purely on instructing an individual to perform a specific task but to give a grounding in the concept called personal competence 7. Ratified skills vs. personal interdependence skills Personal competence Purely technical or MIX of skills and vocational talents Intellectual In aspect Emotional in aspect Learned through Innate or acquired specialized education qualities 8. Learning to do is a concept where technical skills paired with personal competence equips man the ability to perform well in his particular work. Certified skills Personal compet ence 9.Ill. Learning to live discountenancing Other People 80th teachers and students should learn about human diversity, that all people are in equal footing and all are interdependent with each other Children should be taught early In life the understanding of other people's reactions by taking that experience Like RSI their own Recognition of the rights of other people which will bring about the concept of respect 10.Moving towards common goals Shared aspiration bypasses color, religion, physical attributes and cultural differences. Conflicts are set aside, tensions cooled down, arguments are discussed and resolved, variance is accepted, and clashes are put aside. An entity Is being formed by that one common goal and everything that divides the path Is dropped or better yet dissolved. 11. Formal education should then provide time and opportunity to introduce to young people collaborative projects as part of their sports and cultural activities.Senior citizen help scheme Renovatio n of slum areas Relief operations 12. Learning to live together is a concept of interdependence and complementation. This view is expected to overcome various conflicts within society of differing culture, geography, ethnicity and so forth. 13. IV. Learning to be Education has Its goal of changing a man to become individual fulfilled and accomplished as an entity and as a member of his society. In order to reach the full development of a human being, which begins at birth and continues throughout a person's life, education should be a highly individualized process and an interactive social experience. 14. Highly individualized Interactive social process experience A person should be able An individual should be to solve his problems, able to relate with others make his own decisions and learn expressions of and shoulder his own cooperation, unity and responsibilities interdependence 15. Learning to be is the process of becoming. â€Å"elf all of life is directed toward the process of becoming, of growing, of seeing, of feeling, of touching, of smelling, there wont be a boring second. â€Å"(Leo Bacillus,1984)† Education should be the process of helping everyone to discover his uniqueness, to teach him how to develop that uniqueness, and then to show him how to share it because that is the only reason for having anything.

nvq 3 Principles of diversity, equality and inclusion in...

Principles of diversity, equality and inclusion in adult social care settings 1.1 Explain what is meant by a) Diversity Diversity means varied or different, so in a social care setting the importance of diversity means to recognise and respect the importance of people’s wishes and to treat them as individuals. b) Equality Equality means ensuring that everybody is entitled to equal rights and opportunities and therefore preventing discrimination. c) Inclusion Inclusion means to ensure that everybody is made to feel respected and has a sense of belonging. They should feel included and be able to actively participate in activities and be valued for who they are. d) Discrimination Discrimination means unfair or unequal treatment to†¦show more content†¦This can also help to raise awareness of individual’s differences as well as influencing practices and interactions with others. 2.4 Describe ways to ensure that own interactions with individuals respect their beliefs, culture, values and preferences It would be important to find out about their beliefs and preferences andShow MoreRelatedNvq 2 Essay1943 Words   |  8 PagesDECISION, IN WRITING, WITHIN 10 WORKING DAYS OF THE MEETING INCLUDING THE RIGHT OF APPEAL. * Bv – Explain the agreed ways of working with your employer in relation to the following areas * Data Protection – All private information inside the care home should not be discussed outside the facility * Grievance – Follow the procedures on the handbook about making an Informal/Formal discussion of a grievance * Conflict Management - * Anti-discriminatory practice – Treat every residentRead MoreManagement and Manager Induction Standards9580 Words   |  39 Pagesin adult social care, including those managing their own support workers 2012 ‘Refreshed’ web edition, with guidance and certificate we help employers to manage their workforces Contents Introduction Core standards 1 2 3 4 5 6 7 8 Governance and accountability Systems and processes to promote communication Partnership working and relationships Using person-centred practice to achieve positive outcomes Team leadership and management Managing resources Equality, diversity and inclusion SafeguardingRead MoreQuality procedures in life long learning Essay4553 Words   |  19 Pagesï » ¿5 Understand how to apply theories and principles of learning in planning, enabling and assessing learning for 14-19-year-olds. 6 Be able to reflect and evaluate feedback to improve own practice in working with 14-19-yearolds with reference to theories and principles of learning. 2 Understand the principles of quality improvement. 3 Understand the quality improvement procedures relevantto own practice 4 Understand how to ensure that own practice meets internal andexternal quality requirements Read MoreUnit 5001 Personal Development as a Manager and Leader Essay10584 Words   |  43 Pages Author: Liz Oram Kent County Council 16th December 2011 Contents Executive Summary †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Page 3 Introduction †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..Page 3 Section 1†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Page 3 Section 2†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Page 5 Section 3†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Page 7 Section 4†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Page 10 Conclusion†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.Page 12 Recommendation†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..Page 12 Bibliography†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦PageRead MoreLeadership for Health and Social Care and Children65584 Words   |  263 PagesQUALIFICATION HANDBOOK Level 5 Diploma in Leadership for Health and Social Care and Children and Young People’s Services (England) (3978-51/52/53/54/55/56) December 2011 Version 2.1 (July 2011) Qualification at a glance Subject area City Guilds number Age group approved Entry requirements Assessment Fast track Level 5 Diploma in Leadership for Health and Social Care and Children and Young People’s Services (England) 3978 19+ There are no entry requirements Portfolio of Evidence, PracticalRead MoreEssay On Communication And Professional Relationships With Children7131 Words   |  29 PagesCACHE LEVEL 3 SUPPORTING TEACHING AND LEARNING IN SCHOOLS AWARD FINAL 1. In your own words summarise the major learning points from the whole of the study programme with particular reference to:  · Communication and professional relationships with children, young people and adults  · Schools as Organisations  · Understanding child and young person development  · Understand how to safeguard the wellbeing of children and young people Communication and professional relationships with children, young peopleRead MoreEssay on Tda 3.2 Assignment Schools as Organisations9471 Words   |  38 Pageslearning, development care forms the Early Years Foundation Stage (EYFS), which follows the following principles: †¢ Good relationships will give children emotional security. †¢ Provision needs to be inclusive reflect/meet the needs of all children irrespective of their background or ability. †¢ Providers work closely with parents/carers to form a 2-way flow of information. †¢ Play is vital for the children’s learning well-being. All children aged 3-4 years in England areRead MoreEssay on Childhood and Individual Training Plan36789 Words   |  148 PagesYour Induction Workbook Name Elizabeth Freshwater Job title Team Leader Organisation Northerncare Date 20/04/2012 Induction Standards Workbook Contents 2 Contents Contents 3 Chapter 7: Standard 1: understand the principles and values essential for working with children and young people 37 Chapter 9: Standard 3: understand health and safety requirements 56 Chapter 10: Standard 4: know how to communicate effectively 69 Chapter 11: Standard 5: understand the development of children and youngRead MoreHsc Level 5 Unit 534 Essay14626 Words   |  59 PagesCandidate Performance Evidence Record | | NVQ Title and Level: Health and Social Care level 5 Unit 534 †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦...... Candidate Name: Rafal Gac †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..................... Use this form to record details of activities (tick as appropriate) Observed by your assessor | | Professional discussion | | Evidence ref:Unit numbers: | Seen by an expert witness | | Product evidence observed | | | Seen by a witness | | Assignment/ ProjectOther__________________Read MoreEducation System in England7734 Words   |  31 Pages voluntary and private nurseries, childminders and playgroups - available to children between the ages of two and five. At the end of 2000 there were 937,000 pre-school places available - 264,000 in day nurseries, 353,000 in playgroups and other settings and 320,000 with childminders. The government has promised to improve the quality of education available for this age group and to increase the quantity of available places. All four year olds are now promised a part-time place of five morning or