Rails 2 Delayed_job宝石

Question

I am working on rails 2 application where i need to send mail in background job.
I have Notifier model and from controller I call a model method to send mail.
I call that method Notifier.deliver_method_name(params) before using delayed job and after creating I use it Notifier.delay.deliver_method_name(params) .

Now my question arise

1) Should I need to start the rake jobs:work to send mail in background in development and if yes should I run it every time I start server?
2) what do I need to do on production should I run rake jobs:work for the first time ?
3) Is that right if any error occurs then only there is a entry in delayed job if it is successful then there is no entry in delayed_job table.

I follow the below link

https://github.com/collectiveidea/delayed_job/tree/v2.0

Thanks :)

Answer 1

1) Should I need to start the rake jobs:work to send mail in background in development and if yes should I run it every time I start server?

Yes you have to start rake task separately.

Workers can be running on any computer, as long as they have access to the database and their clock is in sync. Keep in mind that each worker will check the database at least every 5 seconds.

2) what do I need to do on production should I run rake jobs:work for the first time ?

Yes you have to with RAILS_ENV=production script/delayed_job start But I suggest you stop and start this at every deployment to take changes done.

3) Is that right if any error occurs then only there is a entry in delayed job if it is successful then there is no entry in delayed_job table.

No it's completely depends on your configuration

# config/initializers/delayed_job_config.rb
Delayed::Worker.destroy_failed_jobs = false
Delayed::Worker.sleep_delay = 60
Delayed::Worker.max_attempts = 3
Delayed::Worker.max_run_time = 5.minutes