Uniqcli

Availability and downtime budget scenarios

Calculate a time-based downtime budget and optional declared dependency scenarios.

Operations

Availability and downtime budget scenarios

Calculate a time-based downtime budget and optional declared dependency scenarios.

Example inputs · Replace these with your measurements to build your plan.

Method, example and sources
  1. Choose the exact observation period and time-based availability target.
  2. Compare observed unavailable minutes with that period and budget.
  3. For a dependency illustration, enter both component assumptions.
  4. Use the parallel-pair equation only after explicitly declaring independent failures.

Worked example. A 99.9% time-based target over a declared 30-day period permits 43.2 unavailable minutes. It does not mean every user request succeeded.

Your planning result

Within the entered time-based downtime budget

The observation window and dependency assumptions remain explicit.

Allowed downtime
43.2minutes
Observed time availability
99.9537%
Downtime budget remaining
23.2minutes
  • Time-based availability is not the same metric as successful requests across partially available services.
  • Series/parallel illustrations assume their stated dependency and failure model; common power, software, control-plane or site failures can invalidate independence. MTBF alone is not availability.

From the catalog

General Purpose UPS

Explore related listings, then confirm the exact model requirements against your plan. These listings are not an automatic compatibility or capacity verdict.

Browse general purpose ups Browse network interface cards Get help with the specification

Define the measurement before counting nines

A time-based availability percentage measures unavailable time over a chosen period. A request-success metric answers a different question, especially when only part of a distributed service is unavailable. This worksheet keeps the period, observed downtime and target explicit. It does not silently assume a calendar month or declare an operational service healthy from one percentage.

Dependency math needs real assumptions

The optional series and parallel illustrations use entered component availability values. A parallel pair only receives the independent-failure illustration when that assumption is explicitly selected. Shared power, network, control-plane, software or maintenance dependencies can make it unsuitable. An equipment MTBF number cannot establish service availability or justify a product recommendation. Keep actual incidents, measurement coverage and restoration behavior with the assessment.

Worked example

A 99.9% time-based target over a declared 30-day period permits 43.2 unavailable minutes. It does not mean every user request succeeded.

Availability and downtime budget scenarios — Uniqcli