*/6 * * * * rake ts:index:delta

* */4 * * * rake seinfeld:update

Comments

• by grosser on 15 Mar 12:56

  That is exactly why i do not use crontab for this.

  We run rake night every night, which then determines which tasks to run, and the counterpart would be rake frequent, which is run every 15minutes and would do whatever you want.

  Imo this is far more secure then hackish cron code and is easier to be updated by non-administrators / does not need to automatically update a crontab file etc etc…

  Additionally execution can be logged easily and any exception can be send to exception collector service.

  my blog post with code example

• by rick on 15 Mar 13:50

  Sure, that’s a great tactic. I’m doing the same thing on the Calendar About Nothing actually. But you still need something to call that rake task periodically. And as I stated above, I still managed to fuck that crontab up :) Your example also assumes that the only thing important on my servers is a single rails app.

  By the way, you could condense your single crontab to 0 0 */6 * * ...

  my rake task, since it’s in a private heroku branch:

  desc "cron task for keeping the CAN updated.  Run once every hour."
  task :cron => 'seinfeld:init' do
    if Time.now.hour % 4 == 0
      Seinfeld::User.paginated_each do |user|
        user.update_progress
      end
    end
  end

• by Nathan Esquenazi on 15 Mar 14:43

  This is a great idea. I have always had an issue with crontab. Not because it is that hard to read (although it can be) but because it is a separate file outside of my application that has to be managed seperately.

  I am sure you guys are aware of this plugin:

  http://github.com/javan/whenever/tree/master

  It is pretty awesome though. I am using it on my current project and it makes life a lot easier.

• by Adam Meehan on 15 Mar 17:55

  I sympathise with the occasional stuff up with cron. You can go a while without using it and then forget some aspect that mucks up you timing which can have dire effects.

  Thats why I created Cronos

  Its cron DSL to make it as English as possible to define and interval for cron. Its the compliment of CronWTF I suppose. It doesn’t do the actual job scheduling like whenever et al. Its designed really to be integrated into projects like whenever to make the syntax as straight forward as possible.

  You can also just use it in the command line or irb to output the cron string to paste into crontab as a sanity check. Its evolving as I use it or see ways to tweak it.

• by Lake Denman on 27 Mar 13:53

  I’ve been using Whenever lately as a cron job manager for my rails app.

  Check it out: http://github.com/javan/whenever/tree/master

• by Valter on 13 Apr 08:22

  Your plugin seems to be better than whenever lately. Ill give it a try in my cirurgia plastica blog.

Comments are closed.