Dated: 12-11-2024
Ch02. what is High Availability (HA)
High Availability
- High availability of a system or component assures a high level of operational performance (uptime) for a given period of time
- High availability is a strategy
- Fault tolerance refers to a system designed in such a way that when one component fails, a backup component takes over operations immediately to avoid loss of service
High Availability is Designed in the following Manner
- System level (data center or service)
- Device level (within single device)
- Device level (combination of multiple redundant devices)
- Alternate site level
High Availability and Fault Tolerance
- Designed to minimize downtime with the help of redundant components
Disaster Recovery
- A pre-planned approach for re-establishing IT functions at an alternate site
Post Assessment
Which of the following refers to the ability of a system to continue its operations without any interruption when one or more of its components fail.
- Robustness
- Fault tolerance
- Resistance
- Vulnerability
Which of the following of a system or component assures a high level of operational performance (uptime) for a given period of time.
- High durability
- High availability
- High assurance
- High redundancy
High availability and fault tolerance are designed to minimize downtime with the help of
- Reducing number of components
- Redundant components
- Restructuring two components
- Removing some components