2015-10-23 18:54:44 -04:00
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# Welcome to Sidekiq Pro 3.0!
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Sidekiq Pro 3.0 is designed to work with Sidekiq 4.0.
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## What's New
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* **Redis 2.8.0 or greater is required.** Redis 2.8 was released two years
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ago and contains **many** useful features which Sidekiq couldn't
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leverage until now. **Redis 3.0.3 or greater is recommended** for large
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scale use.
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* Sidekiq Pro no longer uses Celluloid. If your application code uses Celluloid,
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you will need to pull it in yourself.
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* Pausing and unpausing queues is now instantaneous, no more polling!
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* Reliable fetch has been re-implemented due to the fetch changes in
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Sidekiq 4.0.
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2016-04-26 13:23:45 -04:00
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* Support for platforms without persistent hostnames. Since the reliable\_fetch
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algorithm requires a persistent hostname, an alternative reliability
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algorithm is now available for platforms like Heroku and Docker:
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2015-10-23 18:54:44 -04:00
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```ruby
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Sidekiq.configure_server do |config|
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2016-04-26 13:23:45 -04:00
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config.timed_fetch!
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2015-10-23 18:54:44 -04:00
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end
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```
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2016-04-26 13:23:45 -04:00
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The wiki contains [much more detail about each reliability option](https://github.com/mperham/sidekiq/wiki/Pro-Reliability-Server).
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2015-10-23 18:54:44 -04:00
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* The old 'sidekiq/notifications' features have been removed.
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## Upgrade
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First, make sure you are using Redis 2.8 or greater. Next:
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* Upgrade to the latest Sidekiq Pro 2.x.
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```ruby
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gem 'sidekiq-pro', '< 3'
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```
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* Fix any deprecation warnings you see.
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* Upgrade to 3.x.
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```ruby
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gem 'sidekiq-pro', '< 4'
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```
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