Re: a cume install time estimation formula

["Alexei Pytel" <pytel@xxxxxxxxxx>]

>  formula would have to include an avg cpw1 time to load
>  the avg size ptf and a 2nd cpw1 time to perm apply/supercede the avg
ptf.

It might work - however I have some vague suspicion about average. What is
the average weight between one mouse and one elephant ?

>  alexie, are you saying that a cume may contain ptf's that are already on
the
>  system and the ptf load will effectively skip those already present
ptf's?

Cume package contains all PTFs from release GA until package build time.
Well, it does not include "all" PTFs - just all "popular" PTFs, which have
general interest.
PTF install process will take control information for every PTF on media
(CD) and check for this PTF applicability to current system. This part of
the process is fairly predictable.

> also, is a ptf a new, corrected copy of a pgm?  or is it a patch to a
pgm?
PTFs always replace entire object.


    Alexei Pytel




                                                                                
                   
                    "Steve Richter"                                             
                   
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>
>I see a couple of problems with your formula:
>TimeForEachPtfOnCpw1Sys - PTF sizes are so different that PTF application
>time is wildly different. Did you mean average time across all known PTFs
?


cpw1 time used to apply the avg ptf on the cume.

>Besides you make an assumption that PTF load/temp apply time and PTF perm
>apply/supercede time are the same. Actually it's much faster to perm
>apply/supercede PTF already on system than to load and temp apply a new
>one. This is why the more PTFs already on system, the faster cume apply.


did not know that.  so formula would have include an avg cpw1 time to load
the avg size ptf and a 2nd cpw1 time to perm apply/supercede the avg ptf.

alexie, are you saying that a cume may contain ptf's that are already on
the
system and the ptf load will effectively skip those already present ptf's?

if so, the formula would need to account for ptf on the cume that already
exist on the system, which might be difficult to est ahead of time.

also, is a ptf a new, corrected copy of a pgm?  or is it a patch to a pgm?


thanks,
Steve Richter





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