High availability is the design of systems, networks and applications so they keep running even if one component fails, with minimal downtime. It is achieved by duplicating devices, links or servers so one takes over for another automatically, and it is usually measured as a percentage of uptime, such as 99.9%.
How TecnetOne handles it: Disaster Recovery
HA, redundancy, fault tolerance, uptime
Related terms
CMDB and IT asset management
A CMDB (configuration management database) is the central inventory of a company's IT assets, such as devices, servers, licenses and applications, along with how they relate to each other. Knowing what you have and who owns each asset is the first step to protecting it and fixing failures faster.
Disaster recovery plan (DRP)
A disaster recovery plan, or DRP, is the document that defines how a company restores its IT systems, data and operations after a serious event, such as ransomware, a fire or a data center outage. It sets owners, priorities, procedures and recovery time targets (RTO and RPO).
ITIL
ITIL is the most widely used best-practice framework for managing IT services: it describes how to plan, deliver, support and improve services through processes such as incident, problem, change and service level management. It is not a certifiable standard for companies but a guide each organization adapts.
ITSM and help desk
ITSM (IT service management) is the way IT organizes how it delivers and supports its services, with clear processes to log incidents, handle requests and manage changes. The help desk is the single point of contact where users report problems and get follow-up through tickets.
Backup
A backup is a copy of your company's data and systems stored somewhere else so you can restore them if the original is lost, damaged or encrypted by ransomware. A good practice is the 3-2-1 rule: three copies, on two different types of media, with one of them offsite or in the cloud.
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