The Design and Organization of Data Centers/Redundancy
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Everything will eventually fail. Redundancy allows you to minimize the damage of a system failure.
Failure characteristics[edit | edit source]
Planned vs. unplanned
Total vs. partial
Frequency of failure
Length of partial failure or outage
Types of redundancy[edit | edit source]
Structure[edit | edit source]
Ladder
Mesh
N+1
Implementation[edit | edit source]
Active/active
Active/passive
Human Factors[edit | edit source]
Notification
Unattended problem resolution
Documentation and problem clarity
Allowance for no-impact maintenance