Slack fingers AWS auto-scaling failure in January outage postmortem

'We attempted to add 1,200 servers to our web tier' - but with a saturated network it did no good

Slack says it has identified a scaling failure in its AWS Transit Gateways (TGWs) as the reason for the chat service's monumental outage on 4 January. As a result, Amazon's cloud computing arm said it is "reviewing the TGW scaling algorithms"....