The availability of a website is measured by the percentage of a year in which the website is publicly accessible and reachable via the Internet. This is different from measuring the uptime of a system. Uptime refers to the system itself being online. Uptime does not take into account being able to reach it as in the event of a network outage. A hosting provider's Service Level Agreement (SLA) may include a certain amount of scheduled downtime per year in order to perform maintenance on the systems. This scheduled downtime is often excluded from the SLA timeframe, and needs to be subtracted from the Total Time when availability is calculated. Depending on the wording of an SLA, if the availability of a system drops below that in the signed SLA, a hosting provider often will provide a partial refund for time lost. How downtime is determined changes from provider to provider, therefore reading the SLA is imperative. Not all providers release uptime statistics. Most hosting providers will guarantee at least 99.9% uptime which will allow for 43m of downtime per month, or 8h 45m of downtime per year.
While there are many components to a successful website, it all starts with web hosting. Ensuring that your web hosting company is a top rated, award winning industry leader is a good start to ensure online success! Hundreds of thousands of domains rely on our cutting-edge servers and green data centres to keep their sites running smoothly, and so can you. When you have the right web hosting company on your side, managing your website truly becomes that much easier. HostPapa is the Canadian web hosting company you can trust!
^ March 16, 1992 memo from Mariam Leder, NSF Assistant General Counsel to Steven Wolff, Division Director, NSF DNCRI (included at page 128 of Management of NSFNET, a transcript of the March 12, 1992 hearing before the Subcommittee on Science of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundred Second Congress, Second Session, Hon. Rick Boucher, subcommittee chairman, presiding)
The most basic is web page and small-scale file hosting, where files can be uploaded via File Transfer Protocol (FTP) or a Web interface. The files are usually delivered to the Web "as is" or with minimal processing. Many Internet service providers (ISPs) offer this service free to subscribers. Individuals and organizations may also obtain Web page hosting from alternative service providers.
Cloud host. A cloud host is based on cloud computing technologies that allow a number of servers to act as one system in which website performance can be guaranteed by multiple machines. It often includes a network of servers pulling from different data centers in different locations. Cloud hosts operate as a service that allows clients to buy as much of the service as they need. Cloud hosting is an alternative to hosting a website on a single server. Cloud hosting can be considered both infrastructure as a service (IaaS) and platform as a service (PaaS). Using a public cloud model, a public network transmits data that is physically stored on virtual servers and uses public networks to transmit the data that is physically stored on shared servers that make up the cloud resource.