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2026-04-26 12:06:50 +08:00
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wiki/concepts/high-availability.md
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---
title: High Availability (Cloud)
---
# High Availability (Cloud)
**High Availability (HA)** in cloud computing refers to systems designed to operate continuously without failure, typically by eliminating single points of failure and distributing workloads across redundant infrastructure.
## Common Misconception
> **Myth**: Cloud performance is unreliable.
> **Reality**: Cloud providers offer high availability and redundancy.
## Key HA Characteristics in Cloud
- **Service Level Agreements (SLAs)**: Major cloud providers guarantee uptime exceeding **99.99%**
- **Redundant Infrastructure**: Data and services are replicated across multiple geographic regions and availability zones
- **Automated Failover**: Automatic switching to backup systems when primary systems fail
- **Global Data Center Distribution**: Workloads distributed worldwide for geographic resilience
- **Load Balancing**: Traffic distributed across multiple healthy instances
## Benefits
- Minimized downtime and business disruption
- Improved user experience and reliability
- Reduced financial impact of outages
- Better disaster recovery posture
## Related Concepts
- [[Cloud Computing]]
- [[Disaster Recovery]]
- [[Cloud Migration]]
- [[Multi-Cloud Strategy]]
## Sources
- [[The Myths and Misconceptions About Cloud Computing (LinkedIn)|the-myths-and-misconceptions-about-cloud-computing-linkedin]]
---
title: High Availability (Cloud)
---
# High Availability (Cloud)
**High Availability (HA)** in cloud computing refers to systems designed to operate continuously without failure, typically by eliminating single points of failure and distributing workloads across redundant infrastructure.
## Common Misconception
> **Myth**: Cloud performance is unreliable.
> **Reality**: Cloud providers offer high availability and redundancy.
## Key HA Characteristics in Cloud
- **Service Level Agreements (SLAs)**: Major cloud providers guarantee uptime exceeding **99.99%**
- **Redundant Infrastructure**: Data and services are replicated across multiple geographic regions and availability zones
- **Automated Failover**: Automatic switching to backup systems when primary systems fail
- **Global Data Center Distribution**: Workloads distributed worldwide for geographic resilience
- **Load Balancing**: Traffic distributed across multiple healthy instances
## Benefits
- Minimized downtime and business disruption
- Improved user experience and reliability
- Reduced financial impact of outages
- Better disaster recovery posture
## Related Concepts
- [[Cloud Computing]]
- [[Disaster Recovery]]
- [[Cloud Migration]]
- [[Multi-Cloud Strategy]]
## Sources
- [[The Myths and Misconceptions About Cloud Computing (LinkedIn)|the-myths-and-misconceptions-about-cloud-computing-linkedin]]