Glossary

As implemented for the reporting API functions, these are placeholder terms only and open for discussion.

Entity
A system or group of systems being monitored. An entity can be as simple as a VM or as complex as a data center containing racks of servers running farms of VMs.
Check
A particular attribute of an entity which for which we care about changes in state
Outage
Period of time from when a check goes into the `CRITICAL` state to when it comes out of that state again.
Scheduled maintenance
Periods of time explicitly created by external actors to denote that maintenance is scheduled to occur at these times.
Unscheduled maintenance
Periods of time explicitly created by external actors to denote that maintenance is happening or has happened at these times.
Downtime
Outages minus scheduled maintenances across any given time period.