Showing papers on "Disaster recovery published in 1990"

Distributed RAID-a new multiple copy algorithm

Abstract: A new multicopy algorithm is proposed; it has the potentially attractive property that much less space is required and equal performance is provided during normal operation. On the other hand, during failures the new algorithm offers lower performance than a conventional scheme. As such, this algorithm may be attractive in various multicopy environments, as well as in disaster recovery. The algorithm is presented and compared with various other multicopy and disaster recovery techniques. >

Issues in disaster recovery

Abstract: The increased demand in recent years for continuous operation of databases has created interest in remote backups, which allow systems to continue their operation, even in the presence of disasters The motivation for remote backups and their applicability to various systems are discussed A remote backup can ensure continuous operation, even in the presence of extensive failures that may render an entire site inoperational and for which local replication may be inadequate In particular, the geographic separation of two copies helps isolate failures that might otherwise affect the backup copy, as well as the primary Some of the issues involved in the design, implementation, and evaluation of remote backup mechanisms are presented Consistency is a major interest for remote backups: a recovery mechanism may produce either a consistent backup copy or an inconsistent one Consistency will be highly desirable in most cases, since application programs are usually written under the assumption that they will operate on correct data, and error handling in these programs is rarely comprehensive Some criteria that can be used for evaluating and comparing various remote backup mechanisms are presented Topics discussed are taxonomy, implementation choices, and comparison metrics >

Two Epoch Algorithms for Disaster Recovery

Abstract: Remote backup copies of databases are often maintained to ensure availability of data even in the presence of extensive failures, for which local replication mechanisms may be inadequate. We present two versions of an epoch algorithm for maintaining a consistent remote backup copy of a database. The algorithms ensure scalability, which makes them suitable for very large databases. The correctness and the performance of the algorithms are discussed, and an additional application for distributed group commit is given.

Disaster recovery planning for academic computing centers

Abstract: Planning for recovery from a disaster is quickly becoming recognized as a necessity for higher education computing installations. This article presents a structural framework, describes the stages, and tells how to implement a disaster recovery plan specifically geared to an academic computing organization.

Overview of disaster recovery for transaction processing systems

Abstract: An overview is given of the major issues involved in maintaining an up-to-date backup copy of a database, kept at a remote site. A method is presented for performing this task without impairing the performance at the primary site. The method is scalable, and it is particularly suitable for multiprocessor systems. The mechanism is relatively straightforward and can be implemented using well-known concepts and techniques, such as locking and logging. >

Hurricane Hugo: effect on state government communications

Abstract: The impact of Hugo on state government communications in South Carolina and activities in the wake of the disaster are discussed. The state of South Carolina has been chosen, along with California, as a model state for development of the National Communications System/Telecommunications Services Priority (NCS/TSP) model plan for emergency restoration of telecommunications services. This effort is being undertaken in conjunction with the National Communications System Organization in Washington, DC. They are assisting the state in development of the telecommunications services priority (TSP) plan, to be used in the future for coordinating restoration of critical federal, state, and local telecommunication services. A private sector partnership has been initiated with the telecommunications and utility companies in South Carolina to provide fiber-optic alternate routing and other communications backup capability to each of the emergency preparedness offices in South Carolina counties in future disasters. An exchange of disaster recovery plans with other states has been undertaken. Information regarding each of these efforts is provided. >

Business continuation planning/disaster recovery: a marketing perspective

Abstract: Requirements for restoring telecommunication services to businesses following a disaster such as the central office fire in the Chicago suburb of Hinsdale in 1988 or the recent California earthquake are delineated, and roadblocks to marketing contingency planning and disaster recovery solution are identified. US West's disaster recovery strategies and disaster recovery marketing programme are described. An illustrative case study is presented. >

Disaster recovery planning for telecommunications

Abstract: An overview of the public network designing a network to survive computer disaster recovery backup for telephone central offices cost effective solutions to network recovery assessing vulnerability of the local serving office "common" communications disasters

Handbook of Effective Disaster/Recovery Planning: A Seminar-Workshop Approach

Abstract: CIOs, MIS, and DP managers, facilities managers, and all others concerned with Disaster Planning for computer and communications facilities will find this the most comprehensive and usable handbook ever done. Includes hundreds of forms, checklists, procedural guides for avoiding disaster, and, when unavoidable, recovering with the least difficulty.

Differential and Long-term Effects of Disasters: The Need for Planning and Preparation

Abstract: The psychosocial aspects of disasters have long been established as an area of research, service delivery, education and training, and policymaking and planning. Increasing attention has been given to the psychological impact on both victims and rescue workers in the emergency phase, in preparedness, in search and rescue operations, and in terms of immediate aftereffects. Yet, despite the fact that 45 years have elapsed since Lindemann [1] elucidated many of the principles of crisis intervention, following the tragedy of the Boston Coconut Grove fire, relatively little has been done to ameliorate the long-term psychosocial consequences of disasters. Even more important is that there is still precious little in the way of planning and preparation for disasters. Disaster response remains largely a media-inspired and 'mediated" event. Prompted by media reports, people often rush to save lives in an airplane crash or famine. They may act generously and heroically; but without training or guidance, their response is not always helpful. For example, when a plane crashed recently in New York, people rushed to help - thereby clogging the roads and preventing trained personnel from reaching the scene quickly. The effects of trauma resulting from a disaster, even when that disaster is of short duration, are not always short-lived. (And, of course, many disasters are far from brief in terms of time: witness the drought in the Sahel region of Africa, now in its tenth year.) Symptoms may appear immediately; but they may also develop, if not treated preventively, months or even years following the trauma. A disaster is the impact of a natural or technological catastrophe on a specific population group, and its consequences are the product of that interaction. The destructive force will have different consequences depending on both its strength and the resistance of the affected community. Socioeconomic development is therefore at the core of disasters, and the International Decade for the Reduction of Natural Hazards recently launched by the United Nations has obvious social and economic components. By the same token, disaster recovery is contingent upon community resources, and is not just a function of the initial impact. This is particularly the case in developing countries, where people are exposed to a harsher environment, are more vulnerable in

Switch-based virtual private line service for the financial services industry

Abstract: The financial services industry is a major user of private line automatic ring-down circuits for voice communications. These circuits provide little flexibility in a rapidly changing service environment. A central office switch-based alternative to automatic ring-down circuits used for trading operations is described. This service provides end-user transparency to the current environment and advanced network management features not currently available with private lines. These include end-user administration of station features, rapid reconfiguration, real-time message detail records, diagnostic capabilities, and disaster recovery features for both the network and customer premises equipment. >

It could never happen here

Abstract: Any disaster represents a reactive situation. The key in disaster recovery is to limit this reactive period by quickly evaluating the damage and then implementing the contingency plan. All action should be known and planned. In this way, management can deal with the crisis, and operations can be restored efficiently and effectively.

The computer security framework

Abstract: The organization and maintenance of a security framework constitutes a challenge for every company. The author describes the element of such a framework: objectives, conditions, measures and rules which in nature may be organizational, technical, personal, etc. Security guidelines are presented for physical security, security against water damage, lightning and overvoltage protection, protection of the power supply, and disaster recovery. >

Similarities and Differences in Institutional Responses to Natural and Technological Disasters

Abstract: In this paper three questions are addressed concerning possible differences and their implications for planning between natural and technological disasters. First, are disaster for planning purposes best approached generically or in agent specific terms? The mostly research based answer is that the generic approach is more valid although this does not mean there are no meaningful differences along other dimensions between disasters. Thus, second, we ask along what lines disasters might be usefully differentiated or typologized? Eight key dimensions are discussed, mostly as they are significant for the emergency time phases of disaster occasions. Third, we conclude with asking whether whatever distinction are made, are they equally applicable across all phases of the disaster planning cycle, namely, mitigation or prevention, emergency preparedness, emergency response, and recovery? Our belief discussion takes the position that it appears the generic approach is clearly best applicable to the emergency times phases, somewhat less so for the mitigation phase with recovery falling in somewhat between the others. In the process of answering all three questions, implications for institutional and organizational behavior will be noted.

Prospects for Public Sector Disaster Management in the 1990s: An Indication of Current Issues with Particular Reference to Victoria, Australia

Abstract: Public-sector disaster managers have not conducted a systematic evaluation of the operational and policy issues that they will confront in this decade. This is despite increasing community expectations for disaster management, political requirements for increased performance and accountability, and reduced resources that will put significant pressures on disaster managers to critically evaluate this area. Key issues disaster managers will have to consider include: developing a clearer understanding of "disaster"; understanding that disasters are social events; appreciating the increasing range of hazards to which people are exposed; applying a range of technologies to disaster management; and critically evaluating assumptions about disaster management and operations. Such considerations are not likely to occur spontaneously. Reviews and incremental changes may be generated by political, community, and resource depletion pressures. However, substantial change to disaster management policy and practice is only likely to be achieved if researchers act as a catalyst by making their findings more widely available and by stimulating the public sector to undertake critical analyses of disaster management. Language: en