Oracle Cloud Infrastructure Foundations Course

January 24, 2024 | seedling, permanent

Course By Oracle #

High Availability Design #

Region (Saudi) -> multiple Data Centers across different states 3 Fault Domain -> in each Availability Domain Multiple Availability Domain -> In each Region

Region > Availability Domain (1 or more DC) > each AD contains 3 Fault Domain

Region Saudi. Saudi has one DC currently, but they are adding new datacenters to Riyad and Dammam.

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Every availability domain has 3 fault domains.

Availability Domain #

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Availability Domain (AD) is one or more data centers located within a region.
A region is composed of three availability domains.
- Services/Resources are either Region-Specific (like VCN)
- or Availability Domain Specific (like Compute)

One or more data centers located within a region. Availability domains are isolated from each other, fault tolerant, and very unlikely to fail simultaneously. Because availability domains do not share infrastructure such as power or cooling, or the internal availability domain network, a failure at one availability domain is unlikely to impact the availability of the others. All the availability domains in a region are connected to each other by a low latency, high bandwidth network.

Fault Domain #

A fault domain is a grouping of hardware and infrastructure within an availability domain.
Fault domains let you distribute your instances so that they are not on the same physical hardware within a single availability domain. A hardware failure or Compute hardware maintenance that affects one fault domain does not affect instances in other fault domains.

Use fault domains to:

Protect against unexpected hardware failures
- Protect against planned outages due to Compute hardware maintenance

A grouping of hardware and infrastructure within an availability domain. Each availability domain contains three fault domains. Fault domains let you distribute your instances so that they are not on the same physical hardware within a single availability domain. A hardware failure or Compute hardware maintenance that affects one fault domain does not affect instances in other fault domains.