What is continuous availability?
Continuous availability is a standard or aim for many information technology professionals (IT), especially server administrators, with regard to data access. This standard means that data on a server or other service can always be accessed even if there is some type of error or failure for software or hardware. Such availability can be implemented in a number of different ways, often including redundants in hardware and software, backup systems in the case of failure and software that solves the transition between systems invisibly. Incretent availability has become more important because vital and independent businesses have become more dependent on digital information and technology. For example, an online retail company wants to ensure that customers have access to the company's website and always complete purchases.Go through the sky and landing and take off without problems. There are a number of ways of network administrators and other IT experts strive for this type of availability.
Redundance is perhaps a key concept in creating a system with continuous availability. This means that there is at least one backup for each software and hardware component of the system that can be used in the event of a primary component failure. For example, if fans fail for a server bank, this may lead to overheating and falling the entire server, which will then cause loss of availability for clients connected to this server. However, by having backup fans for the server, it is better to maintain continuous availability. Further measures can then be used to announce technical support that the films have stopped working, so they can be repaired while the backup fans are used.
Continuous availability is often measured as a percentage of the time when it is availableserver or system. This is usually one year in which 99% availability would mean that the system drops to 87.6 hours each year, while the 99.99% availability system decreases only about one hour each year. While only one hour of downtime per year may seem like very high availability, an hour of downtime for the air traffic control system could be catastrophic. Clean is caused by either planned or unplanned outages that refer to times when the system can be at the bottom of the planned maintenance or is due to failure in the failure system.