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pg_easy_replicate
Easily setup logical replication and switchover to new database with minimal downtime
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
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chaosmonkey
Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.
I hear you on that, and can say that Postgres is incredibly capable at going beyond typical relational database workloads. One example are durable queues that are transactionally consistent with the rest of the database play a unique role in our architecture that would otherwise require more ceremony. More details here: https://getoban.pro
We are also working on shifting some workloads off of Postgres on to more appropriate systems as we scale, like logging. But we intentionally chose to minimize dependencies by pushing Postgres further to move faster, with migration plans ready as we continue to reach new levels of scale (e.g. using a dedicated log storage solution like elastic search or clickhouse).
This is great! I wrote a tool that automates most of the things you came across. If you find it useful or would like to extend it with your feedback/ideas, I'd love to have them! Thanks for sharing
https://github.com/shayonj/pg_easy_replicate
OP here - we avoid sequences in all but one part of our application due to a dependency. We use [KSUIDs][1] and UUID v4 in various places. This one "gotcha" applies to any sequence, so it's worth calling out as general advice when running a migration like this.
[1]: https://segment.com/blog/a-brief-history-of-the-uuid/
Never saw this communicated by Google, but Netflix is the company I have in mind for doing that: https://github.com/Netflix/chaosmonkey