Changing Queue type Classic to Quorum

[srikanth ambadipudi]

Hi Team,

I am using currently using " RabbitMQ 3.8.14"  "Erlang 23.3.1"

Ec2 instance type: Ubuntu

I have couple of queries.

1) Currently we are using Queue type as "classic" without mirroring. We have some plans to change queue type to "Quorum". Will i loose any existsings queue messages? Any docs or suggestions will be appreciated.

2) Can i restore the RabbitMq DB into a new node (on same version) without loosing any messages?

[Michal Kuratczyk]

Hi,

1. You can't change the type of a queue - you need to create a new queue of type quorum. Therefore you will not lose messages - they will be still available in the classic queue. You can then use shovel to move messages from one queue to another or just consume messages from the old queue until it's empty and then switch over to the new queue.

2. Not clear if that's related to the main topic. Do you mean to restore a DB to a cluster where the same queue is now a quorum queue? If that's your question then no - on-disk representation of a quorum queue is different from a classic queue. You can use blue-green strategy to migrate to a new cluster if you want: https://www.rabbitmq.com/blue-green-upgrade.html

Best,

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Michał

RabbitMQ team

[srikanth ambadipudi]

Hi,

Thanks for your reply. It really helps.

(new topic)I would like to know about back and restore of rabbitmq db. Any suggestions/practices

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[Michal Kuratczyk]

https://www.rabbitmq.com/backup.html

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Michał

RabbitMQ team