On 2013-08-09 22:56, Alessandro Franceschi wrote:


On Friday, August 9, 2013 9:22:54 PM UTC+2, Jakov Sosic wrote:

    On 08/08/2013 09:10 PM, Alessandro Franceschi wrote:
     > natural to use two different parameters, like service_ensure and
     > service_enable rather than one like service_status.

    Oh, I see. Simpler from the user perspective but more costly from
    performance perspective...


     > there has been some concern about the amount of parameters or the
    need
     > of some of them, but I think it makes sense to give standard
    names for
     > different possible cases, even if you don't necessarily need to
    use them.

    Yeah, that interested me too... Imagine having like 20 modules like
    this
    one included in a node manifest... Wouldn't the compile time explode
    because of all the extra hiera lookups?! :-/


For sure the number of parameters has some impact , as the number of
resources managed by the module.
Some Puppet performance experts ( Brice, are you reading :-? ) can
surely give better ideas of the impact of them when used on scale.

I think it makes sense to make modules that provide some minimal, most
common, reusability parameters and have the occasion to add features and
parameters with predictable names and functions.
This would ease the progressive refinement of a module keeping a
standard layout.

Really, we should provide and explore more examples, with different
layouts for different modules structures, and see how this kind of
parameters fit.

Actually, I'm not much concerned about the compile-time performance, given that the alternative are modules that cannot be re-used because they encode narrow assumptions and do not provide all necessary extension points.


Regards, David

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