什麼是SLA的正常運行時間保證意味著你的VPS?
通過 安德魯·梅勒
越來越多的企業正在遷移到互聯網，在吸引更多的客戶希望, 你可能會尋找這樣做你自己, 而當這些企業去尋找互聯網曝光, 他們必須先找到一個託管公司.
但 the hosting companies all are in the business of finding new clients too and one way they attract new business is through their uptime guarantee or SLA. The uptime guarantee is a way of advertising how often your hosting servers are off line, put another way, it is how often the content on the web hosting servers is inaccessible to the public, your clients.
The term uptime guarantee is a little ambiguous. The term really means “how much downtime is acceptable”. The figures presented also tell a story, one large web hosting provider advertises their uptime at 99.9%, what they are really telling you is that out of a normal month, their service maybe off line for as much as 43.2 分鐘. Advertisers who advertise a 99.5% uptime permit their service to be off line for as much as 216 minutes per month. 做廣告的廣告商 99.99% 然而正常運作時間, 正在宣傳他們的服務可能只有以下人員無法訪問 4.32 minutes per month.
現在你一定在想
當然，數字越好，提供者就越可靠, 相應地，你需要支付的錢就越多
某種程度上你是對的, 但這還不是全部.
正常運作時間保證的基礎是您的網站將正常運行 99.9% (或公司提供的任何數字) 否則您將獲得潛在損失的補償. 閱讀細則至關重要，因為當公司不提供停機補償時, 那麼 “正常運行時間保證” 只是一種行銷策略. 例如; 如果您購買了一家公司的託管服務，並且您的網站每月有三天離線, 然後它下降了大約 10% 的時間. The hosting company should not bill you for the downtime, however, most companies will play off as if nothing had occurred unless you request the compensation for the time lost due to downtime.
But in today’s world, internet links are faster and computers are more powerful than ever
I hear you saying to yourself,
Surely there must be some way to have your information available online 100% 的時間
But that is just not the case; let’s look at what factors play into uptime and down time. The biggest factor in determining how stable a hosting company is going to be is their hardware and software configuration. It is undisputed that some operating systems such as FreeBSD and Linux are more stable operators over the long run than some alternatives. 也, the stability of their internet service provider plays a large role in how things work out for the hosting company. The stability of the internet linkup, that being the vital backbone in a webhosts operation, is crucial. Because of this, many large hosting providers will use fiber linkups which are less prone to failure and provide a higher throughput than their copper counterparts. The final part of the uptime equation has to do with the web hosting company itself or the data center they have engaged to host their physical servers and your precious data. Have they taken safeguards against common problems – wear and tear on hardware, power outages, severe thunderstorms, and malicious computer users? These are all problems that plague service providers of all sorts but are particularly relevant to large internet facing companies.
When figuring which web hosting company you choose for your VPS, don’t only consider the brand name, cost and the numbers and statistics they throw around. Read the fine print to see what their numbers mean and if they are as stable and sound as their marketing copy describes. Following this precautions may just keep your business online.
Remember: Your company’s image is in the hands of your hosting provider, if they go down they can take your reputation with them, so be careful and make sure you understand what you are buying before you commit to it.
If you found this interesting we have a site on Australian VPS Hosting that has some more information on Choosing a VPS Host
Andrew Mailer is a Web Developer, Systems Admin and all round geeky guy bringing you information and advice on web hosting:-)
文章來源: HTTP://EzineArticles.com /?expert=Andrew_Mailer
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