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Update README.md

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Donne Martin
2019-05-12 07:14:32 -04:00
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@@ -552,11 +552,11 @@ Availability is generally quantified by uptime (or downtime) as a percentage of
#### Availability in parallel vs in sequence #### Availability in parallel vs in sequence
If a service consists of multiple components prone to failure, the service's overall availability depends on whether the components are connected in sequence or in parallel. If a service consists of multiple components prone to failure, the service's overall availability depends on whether the components are in sequence or in parallel.
###### Connected in Sequence ###### In Sequence
Overall availability decreases when two components with availability < 100% are connected in sequence: Overall availability decreases when two components with availability < 100% are in sequence:
``` ```
Availability (Total) = Availability (Foo) * Availability (Bar) Availability (Total) = Availability (Foo) * Availability (Bar)
@@ -564,9 +564,9 @@ Availability (Total) = Availability (Foo) * Availability (Bar)
If both `Foo` and `Bar` each had 99.9% availability, their total availability in sequence would be 99.8%. If both `Foo` and `Bar` each had 99.9% availability, their total availability in sequence would be 99.8%.
###### Connected in Parallel ###### In Parallel
Overall availability increases when two components with availability < 100% are connected in parallel: Overall availability increases when two components with availability < 100% are in parallel:
``` ```
Availability (Total) = 1 - (1 - Availability (Foo)) * (1 - Availability (Bar)) Availability (Total) = 1 - (1 - Availability (Foo)) * (1 - Availability (Bar))