Redundancy & reliability

Routing around network and DNS issues
When a client connects to Ably, they connect using either our realtime endpoint realtime.ably.io or communicate over REST using rest.ably.io. Clients are au...
Tue, 23 May, 2017 at 10:26 AM
Message durability and QoS (Quality of Service)
Ably is able to provide a 100% message delivery guarantee, even during outages caused by network and/or hardware failures. The global Ably service ensures...
Tue, 18 Sep, 2018 at 1:20 PM
Self-healing cluster
The Ably realtime system uses a consensus algorithm to communicate between all servers and agree which services are healthy and which are failing. A...
Fri, 11 Dec, 2015 at 1:22 AM
What happens if an Ably datacenter crashes or is terminated?
Ably has been designed from the ground up to cope with the following types of unexpected failures: Unexpected server failures: all data is stored in at...
Tue, 18 Sep, 2018 at 1:53 PM