Incident documentation/2021-06-30 Ulsfo traffic surge

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document status: draft

Summary

Sometime after 22:00 UTC, a traffic surge started to fill up the capacity of a network port in the Ulsfo cluster. By 23:00 UTC the issue was mitigated.

Impact: For up to an hour, a portion of requests may have received a slower response from regions served by the San Francisco DC. This includes New Zealand, and parts of North America.

Documentation:

Actionables

None.

TODO: Add the #Sustainability (Incident Followup) Phabricator tag to these tasks.