Scheduled Jobs

Sidekiq allows you to schedule the time when a job will be executed. You use perform_in(interval, *args) or perform_at(timestamp, *args) rather than the standard perform_async(*args):

MyWorker.perform_in(3.hours, 'mike', 1)
MyWorker.perform_at(3.hours.from_now, 'mike', 1)

This is useful for example if you want to send the user an email 3 hours after they sign up.

Recurring Jobs

For recurring tasks, I recommend using the whenever or clockwork gems. I do not recommend cron gems that integrate directly with Sidekiq as they require the use of distributed locks with Redis.

With whenever, you'll just do something like this in config/schedule.rb:

every 1.day, :at => '12:01 pm' do
  runner 'Warehouse::FtpPull.perform_async'
end

Checking for New Jobs

Sidekiq checks for scheduled jobs every 15 seconds by default. You can adjust this interval:

Sidekiq.configure_server do |config|
  config.poll_interval = 15
end

WARNING: If you have dozens or hundreds of Sidekiq processes, you should raise the poll_interval significantly. process_count * 5 is a reasonable poll_interval for most. Otherwise your processes will slam Redis constantly looking for new scheduled jobs to run.