[LRUG] Ruby Daemons?

[Taryn East]

We're looking into them ourselves atm. There are heaps of tools for this
sort of thing, each differing based on your actual requirements.
I went through rbates' railscasts to get an overview of some of the more
popular ones.
These are the ones that are reasonably recent and relevant:

   1. Using background rake -
   http://railscasts.com/episodes/127-rake-in-background<http://www.google.com/url?q=http%3A%2F%2Frailscasts.com%2Fepisodes%2F127-rake-in-background&sa=D&sntz=1&usg=AFrqEzcaPlwLRj4TgbhukizHlUp2z2v5sg>
   Only good for very-occasional 'do it now in the background' tasks

   2. Starling + Workling -
   http://railscasts.com/episodes/128-starling-and-workling<http://www.google.com/url?q=http%3A%2F%2Frailscasts.com%2Fepisodes%2F128-starling-and-workling&sa=D&sntz=1&usg=AFrqEzfi2YbvXAI1mbIrE4SZOKf7K2ODhg>
   Looks like these are great for continual-queue workers... but in the next
   Railscast he recommends against them for scheduled-jobs.

   3. Custom Daemon (with daemon-generator
plugin<http://www.google.com/url?q=http%3A%2F%2Fgithub.com%2Fdougal%2Fdaemon_generator%2F&sa=D&sntz=1&usg=AFrqEzewTp0bnlsjC_SqKzDj3fdu5CDI9w>)
   - http://railscasts.com/episodes/129-custom-daemon<http://www.google.com/url?q=http%3A%2F%2Frailscasts.com%2Fepisodes%2F129-custom-daemon&sa=D&sntz=1&usg=AFrqEzdpS8P5p1K_wCgU6KvvE9ynEvK-TQ>
   In this one he uses scheduled mailing lists as the example. eg "schedule
   this delivery right now and that one to be delivered next Tuesday".

   4. God - http://railscasts.com/episodes/130-monitoring-with-god<http://www.google.com/url?q=http%3A%2F%2Frailscasts.com%2Fepisodes%2F130-monitoring-with-god&sa=D&sntz=1&usg=AFrqEzeNDtt5QnN2lrF4o9D6IZNCkPtN7Q>
   For monitoring your daemons once you've got a few...

   5. Delayed Job -
http://railscasts.com/episodes/171-delayed-job<http://www.google.com/url?q=http%3A%2F%2Frailscasts.com%2Fepisodes%2F171-delayed-job&sa=D&sntz=1&usg=AFrqEzdku0ngZnYHGk0IiWwglesjsapGDg>
   Automatically supports priority, scheduled-starts and retry-on-failure.
   Ryan Bates suggests using the 'collectiveideas' fork on Github as it's more
   feature-complete and contains useful recipes (eg Capistrano).

There's also spawn, BackgroundJob, BackgrounDRB, background_fu  and heaps of
others.

We're looking at a combination of delayed_job + god (for monitoring.)
But it's interesting to have a look at the wide variety of options out
there.

Cheers,
Taryn
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