On Thursday, February 28, 2013 at 5:29 AM, M.-A. Lemburg wrote:
> On 27.02.2013 19:21, Donald Stufft wrote:
> > On Wednesday, February 27, 2013 at 1:11 PM, M.-A. Lemburg wrote:
> > > On 27.02.2013 18:37, Donald Stufft wrote:
> > > > On Wednesday, February 27, 2013 at 12:10 PM, M.-A. Lemburg wrote:
> > > > > Package installers only need access to the static files in
> > > > > the /simple/ index. Those can be put behind a CDN to increase
> > > > > uptime.
> > > > > 
> > > > > PyPI itself doesn't have to be up and running if you just want
> > > > > to download the files (unfortunately, that's not true at the
> > > > > moment, because the /simple/ index is dynamically generated,
> > > > > but that can be changed).
> > > > > 
> > > > > See http://wiki.python.org/moin/CloudPyPI for details.
> > > > 
> > > > I'm aware of that, but that doesn't change the statement. If /simple/
> > > > is down you cannot determine the external urls. There is no way
> > > > to increase uptime by adding more points of failure. 
> > > > 
> > > 
> > > 
> > > 
> > > Please reread the proposal. The /simple/ index would
> > > get hosted on a separate domain which then points to the CDN.
> > > 
> > 
> > 
> > It. Does. Not. Matter. You are simply moving the SPOF which is
> > /simple/, if /simple/ is how you discover the CDN and/or external
> > urls then the things it points too can have 100% uptime and if
> > /simple/ is down the entire system is down. 
> > 
> 
> 
> We appear to be talking about different things :-)
> 
> The proposal suggests to put the /simple/ index itself
> on Amazon S3 and then have CloudFront distribute the files
> to the end users.
> 
> The PyPI server would only manage pushing the file
> to the S3 buckets. PyPI could go down and Amazon would still
> be serving the files.
> 
> See the "Moving static data to a CDN" of
> http://wiki.python.org/moin/CloudPyPI/Proposal
> 
I'm aware of what you're talking about, Amazon doesn't have 100% uptime. Moving
that there is good for other reasons but it doesn't magically make adding 
multiple
single points of failures defy the laws of nature. 

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