On Fri, Aug 17, 2012 at 2:01 PM, jcbollinger <john.bollin...@stjude.org> wrote: > > > On Friday, August 17, 2012 11:23:46 AM UTC-5, Douglas wrote: >> >> When chaining execs together, and wanting to ensure that exec >> resources are not executed on every puppet run, which method is >> better? Using unless/onlyif or subscribe/refreshonly? >> >> With unless/onlyif, the exec is evaluated every time. With >> subscribe/refreshonly, the exec is only executed when a dependent >> resource changes.... > > > > Neither mechanism is better than the other in any general sense. They serve > different purposes, and it is uncommon that both are applicable to any given > configuration objective. > > The 'unless' and 'onlyif' (and 'creates') parameters serve as means for an > Exec to determine whether it is already in sync. If it is, then its command > will not be run, in the same way that a File that is already in sync will > not redundantly download its content. This should also have implications > for reports, etc.. The 'unless' and/or 'ifonly' commands must run every > time, though. > > The 'refreshonly' parameter, on the other hand, makes application of the > Exec conditional on (and subsequent to) one or more other resources > changing, sort of like an 'on update' trigger in a database. > > In any given case, you should use whichever approach makes sense.
I think...and I might be wrong because I'm a little sleep deprived today, that it seems like you just said the same thing twice... Doug. -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-users@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
