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On 17-09-21 12:09:52, Doug Hellmann wrote:
> Excerpts from Matthew Thode's message of 2017-09-21 10:43:50 -0500:
> > On 17-09-20 14:09:15, Tony Breeds wrote:
> > > On Wed, Sep 20, 2017 at 01:43:51PM -0400, Tony Breeds wrote:
> > > 
> > > > The solution I thought we decide on at the PTG is:
> > > >  * Add a post job to all branches that publish a constraints/$series.txt
> > > >    to $server (I don't mind if it's releases.o.o or tarballs.o.o).
> > > 
> > > Actually we might be better to do this daily from the periodic pipeline.
> > > In our CI we always gate with what is in git so that wouldn't be
> > > impacted.  The question is do we need external consumers to be "up to
> > > the minute" or is a days lag acceptable?
> > > 
> > > I kinda feel like it's okay to be a little laggy.
> > > 
> > > Yours Tony.
> > 
> > I don't think this should be periodic, I'll try to argue the point via a
> > pros/cons listing.  I think we should be trying to have users use
> > upper-constraints via what is currently known as stable, to me that
> > means more often than once a day.
> > 
> > I'm probably a bit biased, so feel free to update :D
> > 
> > pros - periodic
> > * simple update schedule (once a day)
> > * easier on infra (publish just once vs up to 20-30 times a day)
> > 
> > cons - periodic
> > * point in time (once a day) does not guarantee that that point works
> >   while we try to ensure all projects are not impacted by changes, we
> >   are not perfect
> > * we would be making it harder for people to use upper-constraints externally
> >   for one thing (via longer turn around time)
> > * some projects may be using upper-constraints.txt from the url only
> > 
> > pros - post
> > * upper-constraints are available via published location immediately
> > * sets good precident for end users/devs to use it
> > 
> > cons - post
> > * both breaks and fixes quick
> > * more load on infra to publish (20-30 times a day)
> > 
> 
> Another point against a periodic job is that it would be a change from
> what we're doing now, where constraints are updated as soon as the git
> cache is updated.
> 
> I think we should publish using a post-merge job. The job isn't
> expensive, right? It's just copying some files out of git onto the
> web server?
> 
> Do we really land 20-30 changes to the constraints list on an average
> day?
> 
> Doug
> 

It is just copying the file, so nothing big (small file).  I'd say 20-30
changes on a very busy day (giving it the worst case).

-- 
Matthew Thode (prometheanfire)
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