ReferenceGlossary
Blast radius
The share of a system, its users, or its traffic that one failure affects. Fault isolation, such as zones, cells, and small deploys, keeps the blast radius small.
Reliability
In Quorum#
A Zone outage takes down every Node in that zone. With Multiple zones you can spread copies across three zones and give a data Node a standby that takes over in seconds. A Bad deploy fails 8% of App Server requests for each item it shipped, up to 40%, so smaller deploys break less. On Node.js one slow request stalls every request on its event loop, while BEAM keeps each request apart.
Read next#
Availability zone, Bulkhead, Canary deployment, Shared nothing