Availability

 


    High availability is the ultimate goal of moving to the cloud. The idea is to make your products, services, and tools available to your customers and employees at any time from anywhere using any device with an internet connection.

    Cloud availability is related to cloud reliability. 

    For example, let’s say you have an online store that is available 24/7. But sometimes clicking the “checkout” button kicks customers out of the system before they have completed the purchase. So, your store may be available all the time, but if the underlying software is not reliable, your cloud offerings are basically useless.

    High availability is a quality of computing infrastructure that allows it to continue functioning, even when some of its components fail. This is important for mission-critical systems that cannot tolerate interruption in service, and any downtime can cause damage or result in financial loss.

Highly available systems guarantee a certain percentage of uptime—for example, a system that has 99.9% uptime will be down only 0.1% of the time—0.365 days or 8.76 hours per year. The number of “nines” is commonly used to indicate the degree of high availability. For example, “five nines” indicates a system that is up 99.999% of the time.

The basic elements of high availability
The following three elements are essential to a highly available system:

  • Redundancy—ensuring that any elements critical to system operations have an additional, redundant component that can take over in case of failure.
  • Monitoring—collecting data from a running system and detecting when a component fails or stops responding.
  • Failover—a mechanism that can switch automatically from the currently active component to a redundant component, if monitoring shows a failure of the active component.
  • Click the GIF below to go back to the main page. 


  • << Previous Next >>





Comments

Post a Comment

Popular posts from this blog

On-demand Self-service

Image
       On-demand self-service  means that a consumer can request and receive access to a service offering, without an administrator or some sort of support staff having to fulfill the request manually. The request processes and fulfillment processes are all automated. This offers advantages for both the provider and the consumer of the service.      Implementing user self-service allows customers to quickly procure and access the services they want. This is a very attractive feature of the cloud. It makes getting the resources you need very quick and easy. In traditional environments, requests often took days or weeks to be fulfilled, causing delays in projects and initiatives. You don’t have to worry about that in cloud environments.      User self-service also reduces the administrative burden on the provider. Administrators are freed from the day-to-day activities around creating users and managing user requests. This allows an o...
Read more

CLOUD SERVICE FOR MCA MANILA STUDENTS

Image
Cloud computing is becoming increasingly popular every day. The cause for this is the gradual expansion of organizations that want space to keep their data. As a result, firms compete to supply vast amounts of storage space, as well as a variety of features and high-quality services. Cloud computing has been discovered to be a model for providing pervasive, easy, on-demand network access to computing resources. Cloud computing offers a wide range of services and functionalities. The following are the feature that must be in the Cloud Services: (Note that if you want to see more descriptions, just click the GIF below.) It is one of the important and valuable features of cloud computing as the user can continuously monitor the server uptime, capabilities, and allotted network storage. With this feature, the user can also monitor the computing capabilities. The servers are easily maintained and the downtime is very low; in some cases, there is no downtime. Cloud computing comes up with...
Read more