Advanced Server Technologies for Business Continuity

Advanced Server Technologies for Business Continuity

Nijaz Bajgoric (University of Sarajevo, Bosnia)
DOI: 10.4018/978-1-60566-160-5.ch007
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Abstract

Server operating systems described in Chapter VI usually come preinstalled. Additional components can be installed “on-demand” in the form of ServerWare components and modules, as explained in previous chapter. However, there exist more advanced technologies, both hardware and software, aimed at further enhancing the levels of continuous computing and business continuity. These technologies are introduced and briefly explained in this chapter.
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Fault Tolerance And Disaster Tolerance Technologies

Fault tolerance and disaster tolerance technologies are presented, including fault-tolerant servers. In addition, server virtualization technology is briefly explained. Server management software and its components are presented as to business continuity perspective.

Servers may include several types of additional hardware and software features that support so-called “high-availability” technologies such as: SMP/Clustering, support for 64-bit computing, support for Storage Scalability, RAID Technology, Fault Tolerance, Online Reconfiguration, N1 Grid Containers, Dynamic System Domains, Virtual Machine Managers, and so forth. In addition, server platforms-based ServerWare suites include: bundled servers, reloadable kernel and online upgrade features, crash-handling technologies, workload management, Windows/UNIX integration, and so forth.

Further details on these continuous computing technologies are presented in the section that follows.

Fault tolerance is a term describing the ability of a server to continue operating despite the hardware and/or software failures. Fault tolerance typically refers to hardware failures and hardware fault tolerance, even though, software failures such as operating system crashes or network protocols’ crashes are considered as parts of an integrated fault tolerance solution as well. Technologies include redundant hardware devices and components and special hardware with error-checking and hot-swap support. By default, fault tolerance solutions are onsite solutions, the solutions that are installed within the datacenter. They provide the highest level of availability on onsite basis. Fault-tolerant technologies in broader sense contain redundant units-based features as well (e.g., power supply, fan, disks-RAID, network cards, routers and other communication devices, UPS, etc.).

In addition to fault-tolerant technologies, contemporary business is forced to cope with demands for more efficient and effective computing and storage solutions as part of its efforts to recover from any type of failure and/or disaster.

Disaster tolerance is the ability of a server to continue with performing operations despite a disaster.

Disaster Recovery refers to an ability of computer system/operating system to resume operations after some sort of disaster that occurred in data processing unit. In most cases, disaster recovery operation takes some time and almost always there is a delay before data processing can continue. Disaster Recovery methods include: standard tape backups and advanced methods such as: hot sites, data vaulting, disaster recovery sites, and so forth.

There exist several levels (layers) of fault tolerance:

  • a.

    Hardware fault tolerance—including redundant components, replicated processors, additional—redundant memory, redundant networking devices (routers, switches, modems, network cards, etc.), redundant power supplies, and so forth.

  • b.

    System software fault tolerance. This is the second level of fault tolerance that operates on the system software (operating system) level.

  • c.

    Application fault tolerance relates to the application software and ability of the software to be tolerant to a specific code–related problem.

In broader sense, fault-tolerant and disaster-tolerant capabilities include three main technologies:

  • Fault-Tolerance Technologies

  • Disaster Recovery Technologies

  • Disaster Tolerance Technologies.

Fault-tolerant and Disaster-tolerant systems in broader sense include the following technologies: Redundant Units, Data Replication, Hot Sites, Data Vaulting, Disaster Recovery Sites. Some of these technologies overlap with Data Storage Systems, which comprise: standard tape backup technology, Storage Area Networks (SAN), Network Attached Storage (NAS), Off-site Data Protection. SAN and NAS technologies are mainly based either on Fibre Channel as a mature storage backbone technology and/or newly developed Internet SCSI (iSCSI) and Serial ATA technologies.

Complete Chapter List

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Dedication
Nijaz Bajgoric
Table of Contents
Foreword
Angappa Gunasekaran
Preface
Nijaz Bajgoric
Acknowledgment
Nijaz Bajgoric
Chapter 1
Nijaz Bajgoric
The first chapter aims at defining a “big picture” of contemporary business and business computing. Business pressures and business risks are... Sample PDF
Business Computing in the Internet Era
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Chapter 2
Economics of Downtime  (pages 23-39)
Nijaz Bajgoric
After introducing some basic facts on how today’s businesses are faced with several types of business risks, the second chapter tends to explain one... Sample PDF
Economics of Downtime
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Chapter 3
Nijaz Bajgoric
The previous chapter introduced the two major concepts of continuous computing: downtime and uptime. Chapter three goes a step further and aims at... Sample PDF
Business Continuity and Business Continuity Drivers
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Chapter 4
Nijaz Bajgoric
Based on the framework defined in Chapter III, the fourth chapter discusses the models of information architectures that are used in implementing... Sample PDF
Information Architectures for Business Continuity
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Chapter 5
Nijaz Bajgoric
After identifying major downtime points within a client-server architecture in Chapter IV, Chapter V discusses in more details enterprise servers... Sample PDF
Server Operating Environment and Business Continuity Drivers
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Chapter 6
Server Operating Systems  (pages 103-131)
Nijaz Bajgoric
Server configurations described in Chapter V are operated by server operating systems. Server-based application software and business-critical... Sample PDF
Server Operating Systems
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Chapter 7
Nijaz Bajgoric
Server operating systems described in Chapter VI usually come preinstalled. Additional components can be installed “on-demand” in the form of... Sample PDF
Advanced Server Technologies for Business Continuity
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Chapter 8
Nijaz Bajgoric
Chapter VIII discusses the server operating systems’ main attributes from the selection perspective. Several selection criteria are explained... Sample PDF
Choosing the Server Operating Platform for Business Continuity
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Chapter 9
Nijaz Bajgoric
Chapter IX focuses on the role of system administration as an IT-profession and system administrator as a person who does the administrative... Sample PDF
System Administration and System Administrator's Role in Business Continuity
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Chapter 10
Nijaz Bajgoric
Chapters V-IX dealt with server operating environment and its role in ensuring business continuity mostly in cases of ongoing data processing... Sample PDF
Backup and Recovery Technologies for Business Continuity
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Chapter 11
Nijaz Bajgoric
In addition to standard storage and traditional tape-based backup technologies explained in Chapter X, businesses employ advanced storage... Sample PDF
Advanced Storage Technologies for Business Continuity
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Chapter 12
Nijaz Bajgoric
Continuous computing technologies explored in previous chapters, in many cases, are located on different locations. However, they depend on each... Sample PDF
Networking Technologies for Business Continuity
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Chapter 13
Nijaz Bajgoric
After explaining several continuous computing technologies in previous chapters, the book focuses on business continuity management in Chapter XIII.... Sample PDF
Business Continuity Management
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Chapter 14
Nijaz Bajgoric
Continuous computing technologies are employed in order to achieve business continuity from the business operations perspective. In the same time... Sample PDF
Business Continuity for Business Agility
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About the Author