High Availability in Temporal Cloud: Make incidents boring
You can’t stop your cloud provider’s regions from failing. But you can choose whether that failure triggers a crisis, or just a yawn.
This white paper breaks down how High Availability (HA) works in Temporal Cloud: your topology options, what happens during failover, and the deployment patterns that get you to zero recovery time.
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Here's what you'll learn
Which replication strategy fits your risk tolerance
Same-region (SRR), multi-region (MRR), or multi-cloud (MCR)? We break down the latency, cost, and compliance tradeoffs so you can pick the right one.
What actually happens when failover triggers
Automatic vs. manual, failover modes, and why virtual IP mapping beats waiting for DNS.
How to eliminate recovery time with “Active-Active” Workers
Your backend fails over automatically. Your Workers need to be ready. Here’s the pattern that gets you to zero RTO.
How to run failover drills
The exact metrics to watch, alerts to set, and checklist to run, so you’re not testing resilience for the first time during a real outage.
See it in action
When AWS us-east-1 degraded in October 2025, FireHydrant’s alerting pipeline was at risk. They used Temporal Cloud High Availability features enabled to trigger a manual failover to us-east-2.
Outcome: Zero disruption for incident responders.
Full case study inside!
Thanks so much for being so damn rock solid… Our on-call didn’t flinch when us-east-1 went down, and being able to trigger a failover to us-east-2 was 🤌
Robert Ross
CEO, FireHydrant
Why this matters
$300K per hour
That's the starting cost of downtime for mid-sized enterprises. This paper shows you how to protect against the cascading failures that turn a minor blip into a quarterly earnings miss.
DIY is a nightmare
ZooKeeper. DNS caching. Cross-cluster replication. Sound fun? Self-hosting HA forces you to become an infrastructure expert while the incident clock ticks.
Temporal Cloud handles the hard parts
Async replication. Stable endpoints. A 99.99% SLA. Your team focuses on business logic, not plumbing.
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