Can Web Hosting Be One-hundred Percent Reliable?

For a website to be visible to the public it must be hosted on a web server

. There are a variety of hosting types on the market for website owners with different packages suitable depending on the type of website, the content of the website and the amount of traffic that is expected. It is generally considered that, whatever type of hosting is chosen, it is impossible that it can be one-hundred percent reliable with a website always live. The general consensus is that there is always going to be downtime at some point. Sometimes hosting is effected by maintenance tasks that have to be carried out on servers and there are times when problems cannot be completely avoided. For this reason hosting companies will not guarantee one-hundred percent uptime, although they will usually guarantee a percentage that is above ninety-nine percent.

Despite the perception that website hosting cannot be one-hundred percent reliable there is a possibility that a situation can be achieved whereby a site is almost certainly never offline. But how is this possible? If you have a hundred data centres in a hundred different locations (possible in different countries) and a backup of your website in every single one, then it is extremely unlikely that they are all going to be experiencing problems or are all going to be down at the same time. This would only ever really happen if the site was deliberately targeted. The reality is that it would probably take less than one-hundred backups in different data centres for this to be achievable. Ten data centres would possibly be enough. Where this is the case guarantees of one-hundred percent uptime would be unlikely (as in theory them all being down simultaneously is still possible) but in reality a website is extremely unlikely to ever be offline.

So, it is possible that a website can be live all of the time. This is, though, extremely expensive. Hosting a site in one data centre is expensive enough so multiplying this several times over simply as a security measure will cost a lot. For certain types of sites it is worth this cost, though. This cost can be reduced, however, with the use of cloud hosting.

Cloud hosting is an increasingly popular form of web hosting. Rather than purchasing a dedicated server where a website is hosted, utilising cloud hosting means that the required hosting resources are spread across several servers. This reduces the likelihood of significant downtime, thus increasing reliability.

So cloud hosting has security benefits. As well as the regular cloud hosting security advantages it can also be used to make one-hundred percent uptime more of a possibility but at a cheaper cost than is otherwise the case. As the load can be spread across many servers it means using multiple backups in multiple data centre may not be necessary.

Will there ever be a time when one-hundred percent uptime can be guaranteed? This may or may not become possible in the future. What is likely, though, is that circumstances could be achieved whereby any downtime is extremely unlikely and cloud hosting is something that will make this both more achievable and achievable at a lower cost.

Andrew Marshall

by: expo09

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