zero downtime
Always-on system state
Zero downtime describes systems or processes that remain continuously available without interruption.
In computing and business operations, it means services stay running even during maintenance, updates, or failures: We deployed the new code with zero downtime.
The term often appears in marketing for hosting services and software platforms, where any interruption costs money or trust.
- continuousWithout pause or gap
- uptimeContinuous operational period
- availabilityState of being obtainable
- always onContinuously active, without pause
- seamlessWithout visible joins
deployment · failover · redundancy · rolling · migration · cutover · maintenance · reliability · cluster · load balancer · switchover · graceful · replication · uninterrupted · resilience · elastic · scaling · heartbeat
zero downtimesystem failure
Complete breakdown of operations
service outage · downtime · offline · blackout · service disruption
zero downtimemaintenance window
Scheduled time for system work
scheduled maintenance · scheduled outage · service window · system reboot · maintenance mode
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