On 14/07/2023 12:37, Dmitriy Rabotyagov wrote: > PS: your [2] and [3] links are exactly the same. Sorry. I really should have sent out the email after lunch ;-) [2] was supposed to be https://blog.rabbitmq.com/posts/2021/08/4.0-deprecation-announcements/#removal-of-classic-queue-mirroring in regards to be saying: > With the deprecation of classic mirrored queues within RabbitMQ this > migration needs to happen sooner or later anyways. In short: before RabbitMQ 4.x the classic queues need to be gone for good. No more config option, no looking back. Regards Christian