It is not uncommon for IT users to ask why high availability is an important quality in a web host. It is important because low redundancy or unscheduled downtime is very valuable for many businesses. Downtime represents a lost revenue generation opportunity. UK web hosting providers help clients avoid those losses. This is vital for mission-critical applications and Web-sites that must maintain always available status 24x7. The service commitments made by a provider are specified in the service level agreement (SLA) concluded with the client.
Low redundancy is essential for mission-critical Web-sites, software applications that must maintain an always-on presence, 24x7. The global positioning system (GPS) is an example of a system that requires absolutely zero downtime. Service availability commitments made by a uk webhost are usually detailed in the SLA (service level agreement) finalized with the client.
Redundancy and recovery time are, of course, concepts closely related to availability. This note provides a brief discussion of these concepts, beginning with redundancy. To achieve high availability, some providers adopt both passive and active redundancy strategies. Customers will benefit from a clear understanding of both these strategies.
Scheduled downtime may involve routine repair and maintenance, installation of new more efficient units, replacement of outdated capacity and so on. It also often involves the installation of a new software patch to existing system software. That patch installation usually requires a reboot or a modification to the existing system configuration to ensure the new software takes effect.
Unscheduled downtime typically arises from a physical malfunction like a hardware or software failure, power outage, failed CPU or RAM components, a temperature related shutdown, physically disrupted network connections, security breaches, or various other software, middleware, or operating system failures.
Some suppliers exclude scheduled downtime from their reported uptime calculations. Excluding scheduled downtime does of course raise the availability reported by the host. This makes their performance appear more favourable. They argue this exclusion is justified because this scheduled downtime is non-discretionary or beyond the control of the host.
For example, a week has 168 hours and a four week period has 672 hours. Each four week period may require 10 hours of scheduled server downtime for routine maintenance. A web host may report 100 percent availability during that four week period even though it may have had to discontinue operations for 10 hours during the scheduled maintenance period.
These blog sites have the legal right to remove all the content from a blog, without any obligation to notify the blogger, if the blog content is deemed offensive or to contravene the policy of the host.
In summary, it is easy to see why high availability is an important quality in a web host. High availability means high operational uptime and this in turn allows maximized revenue earning potential. Put another way, high availability is equivalent to low redundancy. This is financially important for many businesses and operationally critical for various public services (like GPS). Web hosting can help avoid lost opportunities.
Low redundancy is essential for mission-critical Web-sites, software applications that must maintain an always-on presence, 24x7. The global positioning system (GPS) is an example of a system that requires absolutely zero downtime. Service availability commitments made by a uk webhost are usually detailed in the SLA (service level agreement) finalized with the client.
Redundancy and recovery time are, of course, concepts closely related to availability. This note provides a brief discussion of these concepts, beginning with redundancy. To achieve high availability, some providers adopt both passive and active redundancy strategies. Customers will benefit from a clear understanding of both these strategies.
Scheduled downtime may involve routine repair and maintenance, installation of new more efficient units, replacement of outdated capacity and so on. It also often involves the installation of a new software patch to existing system software. That patch installation usually requires a reboot or a modification to the existing system configuration to ensure the new software takes effect.
Unscheduled downtime typically arises from a physical malfunction like a hardware or software failure, power outage, failed CPU or RAM components, a temperature related shutdown, physically disrupted network connections, security breaches, or various other software, middleware, or operating system failures.
Some suppliers exclude scheduled downtime from their reported uptime calculations. Excluding scheduled downtime does of course raise the availability reported by the host. This makes their performance appear more favourable. They argue this exclusion is justified because this scheduled downtime is non-discretionary or beyond the control of the host.
For example, a week has 168 hours and a four week period has 672 hours. Each four week period may require 10 hours of scheduled server downtime for routine maintenance. A web host may report 100 percent availability during that four week period even though it may have had to discontinue operations for 10 hours during the scheduled maintenance period.
These blog sites have the legal right to remove all the content from a blog, without any obligation to notify the blogger, if the blog content is deemed offensive or to contravene the policy of the host.
In summary, it is easy to see why high availability is an important quality in a web host. High availability means high operational uptime and this in turn allows maximized revenue earning potential. Put another way, high availability is equivalent to low redundancy. This is financially important for many businesses and operationally critical for various public services (like GPS). Web hosting can help avoid lost opportunities.
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