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Re: [cross-project-issues-dev] Download stats and p2
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If it is p2 downloads then the "files" to track would simply be the
features correct? or am I missing something.
-Eric
Wayne Beaton wrote:
Greetings all. We have a small problem. Actually, I guess that the
problem is as big as you choose to decide it is...
The Eclipse Foundation tracks downloads that go through the
download.php script:
http://www.eclipse.org/downloads/download.php?file=[...]
This includes things like the packages and direct downloads provided
by projects (assuming that everybody is using the script in their
download links).
Downloads that occur through p2 do not go through this script. They go
directly to our download server and to our mirrors. The mirrors do not
(and arguably cannot reasonably) provide us with download stats.
So... if somebody, for example, downloads the "Eclipse IDE for PHP
Developers" we will know that we have one more download of PDT. If
they instead download the "Eclipse IDE for Java Developers" and then
use p2 to add PDT to their configuration, we currently do not have any
way of tracking that download of PDT.
Inability to accurately track downloads is a huge concern for the
Eclipse Board.
We have explored several mechanisms for tracking this download.
Unfortunately, we've not been holding these conversations as publicly
as I'd like, so I'll summarize them briefly below...
1. Get mirrors to give us their download stats. We could ask. But most
will not give them to us. Besides, their logs probably contain
information about everything they mirror, which will be way more
information than we need. And it'll be a heck of a lot of information
for our webmasters to weed through.
2. Add a plug-in that gathers information from p2 post install and
send that information to eclipse.org. Effectively, this is a call-home
mechanism that will require some additional UI elements and
considerable effort awfully late in our development cycle. Ultimately,
it will require some kind of opt-in from the user; many of whom will
refuse leaving us with incomplete data. FWIW, we could use the UDC for
this, but it has the same problem.
3. All p2 downloads go through eclipse.org. Denis is concerned that
the download.php script and--to some degree--the rest of our
infrastructure will not be able to scale to handle the value that can
potentially come from p2 downloads. FWIW, we're not increasing our
bandwidth for Galileo; instead, we're depending very heavily on mirrors.
Bug 239668 [1] has been open for some time to discuss this issue.
We've decided that the best approach is something that we've been
calling the "Single File Hack". In this hack, we configure the p2
metadata (artifacts.xml) to send requests for some small subset of the
files to eclipse.org. Ideally, we send requests for one plug-in or
feature for each thing that we need to track. The number of files
needs to be kept relatively small.
There are problems with this hack. For one, eclipse.org becomes a
single point of failure for all downloads. Further, we will have to
let organizations that mirror our downloads for internal consumption
know how to turn it off.
What we're going to need from each project is the names of the files
that we need to be tracking.
I'd love to hear your thoughts on this topic.
Wayne
[1]https://bugs.eclipse.org/bugs/show_bug.cgi?id=239668
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