[Beowulf] Ineternet cluster
gdjacobs at gmail.com
Mon Oct 2 03:07:12 EDT 2006
Warren Turkal wrote:
> On Saturday 30 September 2006 01:15, Maxence Dunnewind wrote:
>> i would do a "packaging farm" because i know some people who packages some
>> big app, and the building time is about 20 hours :/
>> So, do you think there really is no solution for parrallel works over
>> Internet ?
>> (Maybe just with some computer with a big connection over Internet ...)
> For the most part, compiling is about having really small files be processed
> really quickly. Doing it in parallel would mean having many identically
> configured machines (same compiler, same libraries, etc.).
> This might be hard
> to coordinate if the machines are not maintained by the same administrator.
The machines automatically sync against the central server/dispatcher.
> Not to mention, the latency of sending a file to another machine to be
> compiled or sending prerequisite files for linking would probably overweigh
> the benefit of the parallel compile. If you had extremely low latency and
> identically configured servers, you might see some benefit.
It's parallel at the package level.
> However, I would have to question the utility of something like that when I
> look at the Debian buildd system, I see that the ETA for all packages on all
> architectures page () shows very low numbers for all major architectures.
> The only architectures that are over 10 hours out are armeb and m68k. M68k is
> not very important these days, and armeb seems to be an embedded
> architecture. I don't think either of those are release architectures for
> etch. For the other architectures, I don't think it's uncommon to have
> buildds turned off at times and not build. The Debian buildds are not based
> on a beowulf style setup and don't do parallel compiles to my knowledge. Each
> build daemon builds one whole package and moves on to the next IIRC.
Yes, but there are many machines for each arch on the buildd network.
> All of these factors lead me to believe that parallel builds are not required
> to keep up with the flow of even massive bodies of software, like the archive
> that makes up Debian, for instance. According to the Debian home page, Debian
> contains 15490 binary packages.
>  http://www.buildd.net/cgi/all_ETA.cgi
Not official. Try:
By the trendline for m68k, I'm thinking we're gonna have to start using
emulators to compile m68k software.
Geoffrey D. Jacobs
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