🟢 Low  | Source: AWS What’s New
AWS has added three new execution blocks to Amazon Application Recovery Controller (ARC) Region switch, automating database scaling and failover for Aurora (serverless and provisioned) and Neptune global databases during multi-region failover events. Previously, teams had to manually right-size secondary clusters under incident pressure, adding critical minutes to recovery time. These new blocks remove that manual step, reducing recovery time and human error during regional outages.
Architect’s Take: Review your existing ARC Region switch plans and incorporate the new Aurora and Neptune execution blocks to eliminate manual scaling steps from your runbooks. This is particularly relevant if you run active-passive Aurora global database configurations with scaled-down secondary clusters, as automating right-sizing directly reduces your effective RTO.
Original advisory: ARC Region switch adds Amazon Aurora scaling and Amazon Neptune global database failover