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When to upgrade a production application to Rails 3.1?

I see some people upgrade their applications to Rails 3.1. When is the best time to upgrade a production application ? As soon as it is released? When will the next stable release be released? A major release such as Rails 4?

The application is currently running 3.07 on Heroku.

Thanks.

EDIT: Yes, by running Ruby 1.92p180.

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2 answers

Checks for certainty.

The answer also depends on many other factors related to your setup, such as:

  • What is your current test strategy? Do you experience volume?
  • Do you have many users who would drown your ability to respond if there is a problem?
  • Do you have a backup / plan recovery / restore strategy if problems arise?
  • What is your backup strategy and how well do you do it?
  • How complicated is your code and what custom code does it exist?
  • How similar are your development / testing / production environments?
  • Is there any specific business reason for updating now, and not wait a month or two (given that it was just released).
  • You are using ruby ​​1.9.2 (almost certainly, but you need to check it out).
  • Do you plan for staff availability for downtime / interruption in case
  • Have you tested the actual planned move process on test servers to make sure there are no gotchas?

In general, I would wait 2-3 months. Moreover, with Rails 3.1, since there were quite a few changes in this release, the point, although again the tests should help - although this will depend on their availability and completeness.

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When all your tests pass.

Usually I wait until at least the .1 release to upgrade an existing production application. But I have applications running on 3.1, since they are developed using beta versions and RC files, and there are still no problems.

But seriously, when all your tests pass.

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