Re: No downtime rolling upgrades with migration

Depending on the requirements. Either two different databases or point to one database.

Or

Link one database to master (read and write)

Another database instance to read only.

And you can change Another database to main.

Cheers 

On Sun, 26 Mar 2023, 22:33 Sandip Bhattacharya, <sandipb@showmethesource.org> wrote:

On Mar 26, 2023, at 4:32 PM, Damanjeet Singh <mailtodaman@gmail.com> wrote:

3. How do you do non-backward compatible schema upgrades? Do you do it out of band from deployments? Do you shift traffic to a different cluster, and then zero traffic upgrade the whole cluster at once?

Daman: Blue Green deployment can help. You can distribute traffic to old and new. When all stable then move everything. You can use kubernetes with helm.

Do you do blue-green deployments with two different databases? 

- Sandip

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