LHC@home

My W7 computers have Xeon E5 CPUs with 28 to 44 threads. They all have 16 GB RAM and not always excess disk space. I'm trying to find a way to run as many LHC WUs as possible without consuming all my memory. I tried installing a different app_config.xml in the C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome folder on each rig. E.g.
Rig-1

<app_config>
<app>
    <name>sixtrack</name>
    <user_friendly_name>SixTrack</user_friendly_name>
</app>
<app>
    <name>ALICE</name>
    <user_friendly_name>ALICE Simulation</user_friendly_name>
    <max_concurrent>1</max_concurrent>
</app>
</app_config>

Rig-2

<app_config>
<app>
    <name>sixtrack</name>
    <user_friendly_name>SixTrack</user_friendly_name>
</app>
<app>
    <name>ATLAS</name>
    <user_friendly_name>ATLAS Simulation</user_friendly_name>
    <max_concurrent>1</max_concurrent>
</app>
</app_config>

Rig-3

<app_config>
<app>
    <name>sixtrack</name>
    <user_friendly_name>SixTrack</user_friendly_name>
</app>
<app>
    <name>cms</name>
    <user_friendly_name>CMS Simulation</user_friendly_name>
    <max_concurrent>1</max_concurrent>
</app>
</app_config>

Rig-4

<app_config>
<app>
    <name>sixtrack</name>
    <user_friendly_name>SixTrack</user_friendly_name>
</app>
<app>
    <name>Theory</name>
    <user_friendly_name>Theory Simulation</user_friendly_name>
    <max_concurrent>1</max_concurrent>
</app>
</app_config>

Rig-5

<app_config>
<app>
    <name>sixtrack</name>
    <user_friendly_name>SixTrack</user_friendly_name>
</app>
<app>
    <name>LHCb</name>
    <user_friendly_name>LHCb Simulation</user_friendly_name>
    <max_concurrent>1</max_concurrent>
</app>
</app_config>

Problem is that each rig continues to DL any and all projects. I want to participate in all LHC projects but need to spread them across different computers. The project check boxes in LHC web preferences cannot do that. What's wrong???

This doesn't work as you expect.

1. BOINC doesn't allow to include or exclude subprojects via app_config.xml.
This can only be done via the preferences on the project website.
There you can define 4 "venues" and each of them can run a subset of the available subprojects.
Then assign a venue to a rig on the "computer" page.

2. ALICE is not (yet) available for BOINC volunteers.

3. If you need to use an app_config.xml you may make yourself familiar with it's syntax.
Your examples show a tag that would be ignored by your client. See:
http://boinc.berkeley.edu/wiki/client_configuration#Application_configuration

1. Thanks. I assume by 4 venues you mean Computing, Home, School & Work. I have 36 rigs and that would be a nightmare. I never use web based preferences except maybe "Run only the selected applications." Hmm, that might help, pick one VM project plus Six Track and use app_config.xml to limit the number of VMs to run. Think I'll try that for awhile. Thx again.
All the problems I'm having are related to Virtualbox. I think my best solution is to uninstall Virtualbox.
2. ok
3. I assume the ignored tag is:

<user_friendly_name>SixTrack</user_friendly_name>

I just copied <app>...</app> from the client_state.xml file. Would it run differently if I commented it out?
I find that BOINC syntax wiki ambiguous. Having to figure it out by trial and error.

I think the 16GB of ram is more limiting than disk space.

You can use a Bonic Manager to deploy the configs to the computer more easily.

e.g

https://boincstats.com/en/page/faq

3. Yes, you just need the app name

<?xml version="1.0"?>
-<app_config>
<!--Set WebSettings to 3 Cores, 5GB-->
-<app_version>
<app_name>ATLAS</app_name>
<plan_class>vbox64_mt_mcore_atlas</plan_class>
<avg_ncpus>2.0</avg_ncpus>
<cmdline>--memory_size_mb 4900</cmdline>
</app_version>
</app_config>