Version 4.31b ist buggy.

LHC@home etc.
Nachricht
Autor
Pascal

Version 4.31b ist buggy.

#1 Ungelesener Beitrag von Pascal » 05.05.2003 16:19

Stephen Brooks hat geschrieben: Yes, v4.3x is currently a lot of separate projects. They would normally be coupled by a best250 file or something of the sort, but I've got some bugs in the client to still work out, so in a way it's still in "beta".

Having a lot of separate optimisations is good, though, because the standard weakness of optimisation techniques is that they can get stuck in a "local" maximum. There is no way around this other than to simulate a very large number of individual pathways from different starting points, to find the global maximum. Then after I've let the paths go off into their own directions (and possibly on paths to different local maxima), the bestNNN is released and typically in that the ones that were getting stuck in the lower local minima are gradually competed out by the higher ones.

I think maintaining variety from different paths together in the bestNNN is important because often good ideas in engineering come from trying to combine the best aspects of two fairly different designs. Muon1 has three different ways of combining genomes, so in other words, it'll try and mate a human with a cat, then it'll try and stitch a human's head onto a cat, and then it'll make a human dress up as a cat before it gives up.

The problem with a central results server as you suggest is that it is _not_ distributed. Although the current genetic algorithm operations are relatively fast compared to the simulations themselves, it's possible I could in future use something more complicated (like a neural network, or some sort of local gradient estimation) to do this, which I might find with 1000 users and a database of 1 million results begins to get too much for 1 computer.

In truth I've been surprised at the number of people who have joined up to this project - I initially only needed a few users, but due to 'popular demand' have been investigating ways to gradually make better use of the computing power available. The first of those was in v4.2 when I greatly increased the number of parameters in the optimisation - and the network still coped with it. More recently I've been putting systems in place for me to simulate many different accelerator-design ranges in parallel on the network, to use even more power and also to increase the productivity in general.
...immer noch etwas beta, diese Clientversion?

Bananeweizen: Was tun? Muon zunächst wieder verdammen zu inaktiven Projekten?

Benutzeravatar
Bananeweizen
Urvater
Urvater
Beiträge: 2867
Registriert: 14.06.2001 01:00
Wohnort: Kornwestheim

Re: Version 4.31b ist buggy.

#2 Ungelesener Beitrag von Bananeweizen » 05.05.2003 17:32

Pascal hat geschrieben:Bananeweizen: Was tun? Muon zunächst wieder verdammen zu inaktiven Projekten?
Nö.

Benutzeravatar
Velociraptor
Stromkosten-Ignorierer
Stromkosten-Ignorierer
Beiträge: 1029
Registriert: 13.11.2001 01:00
Wohnort: nähe Wien

#3 Ungelesener Beitrag von Velociraptor » 07.05.2003 18:25

hm hab da ein komisches ergebnis
tantalumrodz=452;tantalumrodr=001;s1l=996;s1f=996;d1l=994;s2l=945;
s2r=998;s2f=990;d2l=001;s3l=998;s3r=998;s3f=995;d3l=620;s4l=996;
s4r=995;s4f=995;d4l=428;s5l=996;s5r=995;s5f=832;d5l=160;s6l=996;
s6r=996;s6f=995;d6l=000;s7l=994;s7r=995;s7f=993;d7l=455;s8l=993;
s8r=994;s8f=995;d8l=626;s9l=993;s9r=993;s9f=997;d9l=254;s10l=994;
s10r=996;s10f=996;d10l=049;s11l=993;s11r=995;s11f=871;d11l=003;
s12l=995;s12r=963;s12f=991;d12l=998;s13l=995;s13r=963;s13f=994;
d13l=214;s14l=995;s14r=996;s14f=994;d14l=131;s15l=996;s15r=998;
s15f=995;d15l=120;s16l=993;s16r=994;s16f=996;d16l=458;s17l=995;
s17r=996;s17f=995;d17l=775;s18l=995;s18r=996;s18f=996;d18l=149;
s19l=992;s19r=994;s19f=996;d19l=995;s20l=996;s20r=996;s20f=995;
d20l=000;s21l=993;s21r=982;s21f=996;d21l=000;s22l=725;s22r=997;
s22f=995;d22l=195;s23l=996;s23r=996;s23f=996;d23l=819;s24l=996;
s24r=987;s24f=994;d24l=199;s25l=981;s25r=997;s25f=993;d25l=518;
s26l=994;s26r=986;s26f=995;
-1.#IND00 (342.6 Mpts) [v4.31b] {5374C6AC} <SolenoidsOnly>
das isn bug oder ??
There is no place like 127.0.0.1
--------------------

Pascal

#4 Ungelesener Beitrag von Pascal » 07.05.2003 18:32

Velociraptor hat geschrieben:hm hab da ein komisches ergebnis
...

das isn bug oder ??
Jepp. Der wurde in Stephens Forum schon gepostet. Einfach das Ergebnis aus den results.txt und results.dat löschen und weitercrunchen.

Kleine Info noch: Schaut euch mal MD@Home unter "Sonstige Projekte" an. Russisches Projekt, ähnlich F@H, sehr interessant!

Zurück zu „Atom-/Elementarphysik“