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Server+ Certification Training Guide by Server+ Certified Technician Elton Jernigan

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High Availability

  • 0.13 Identify hardware components that give a network server the capability to be up a very high percentage of the time, up to and including a 24 hour per day, 7 day per week operating environment.

High availability is the goal of keeping the network server operational 24 hours per day, 7 days per week. Many techniques can be used to try to achieve high availability. In addition to methods already discussed (redundancy, fault tolerance, RAID, UPS, clustering), some other methods are also available.

Some network server vendors provide what they call high availability solutions. Most of these involve two servers sharing an external set of RAID disk drives. When one server fails, the other server takes over. This high availability ...

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