What is high availability (HA)?
High availability (HA) is a system design that keeps a service running when individual components fail. It relies on redundancy, such as multiple servers, replicated databases, and deployment across availability zones, plus automatic failover. Availability is usually expressed as an uptime percentage like 99.9%.
What the buyer is really asking
Buyers want to know if a single failure takes you down. Describe the redundancy in your architecture (multiple availability zones, replicated databases, load balancing) and your uptime record. Say where a single point of failure still exists if there is one.
Other ways buyers ask it
Every one of these wants the same answer:
- “How do you ensure high availability of critical systems?”
- “Is your service deployed across multiple availability zones?”
- “Do you maintain equipment redundancy for business-critical systems?”
- “What is your uptime SLA?”
Evidence to have ready
- An architecture diagram showing redundancy
- Historical uptime from your status page
- The SLA in your terms, if you offer one
How Tyrvar answers this
Tyrvar treats every wording above as one question. You write the answer once, attach the evidence, and revisit it when your setup changes. Each buyer gets that approved answer no matter how their questionnaire words it. If you have not answered it yet, Tyrvar flags the question for you and does not make something up. Try it on your own questionnaire.