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Memory requirement per task for Theory and CMS?
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Author | Message |
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Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
Hi, Does anyone know the current memory requirements per task, for Theory and CMS? E.G. 2GB per thread/task I am trying to work out how much RAM I need to run Theory and CMS on a 22c/44t host. Thanks |
![]() Send message Joined: 15 Jun 08 Posts: 2291 Credit: 208,924,245 RAC: 135,378 ![]() ![]() ![]() |
For a rough estimate you may use the size of the VMs that are set up by each task. CMS: 2GB/task Theory: 630MB/task Then add a few GB for the OS and the disk cache. |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
Thanks that's most helpful. |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
As a side issue, any ideas on why some (or all) VM's produce the error on Theory tasks: 'fail to open the medium with the following ID..'? This host has already completed some tasks so I would guess its all setup correctly. Its currently running VirtualBox 6.1.2. |
![]() Send message Joined: 15 Jun 08 Posts: 2291 Credit: 208,924,245 RAC: 135,378 ![]() ![]() ![]() |
Consider to make your computers visible for other volunteers here: https://lhcathome.cern.ch/lhcathome/prefs.php?subset=project This makes it easier to check for setup issues. |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
I have now made the added hosts visible; its the V4 Xeon that is having these errors. These are the commands I used to setup VirtualBox: echo "deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian bionic contrib" | sudo tee -a /etc/apt/sources.list wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add - apt update apt install virtualbox-6.1 |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
This is (one of) the error's and its info: ![]() |
![]() Send message Joined: 15 Jun 08 Posts: 2291 Credit: 208,924,245 RAC: 135,378 ![]() ![]() ![]() |
echo "deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian bionic contrib" | sudo tee -a /etc/apt/sources.list Are you sure there is no typo? You wrote bionic. Shouldn't it be boinc? |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
No typo, its not actually BOINC although it does look kind of similar. Its my understand that Bionic is the release name for Debian 18.04. |
![]() Send message Joined: 15 Jun 08 Posts: 2291 Credit: 208,924,245 RAC: 135,378 ![]() ![]() ![]() |
OK, my fault. Since I prefer opensuse I'm not familiar with the recent naming conventions for debian like linux distributions. Could you shutdown all currently running VMs (if any) and replace virtualbox-6.1 with virtualbox-6.0? I noticed some strange behavior caused by changes in 6.1 that might conflict with the vboxwrapper used by LHC@home. Other users state they don't have problems but I think it's worth to try it out. |
Send message Joined: 12 Feb 20 Posts: 7 Credit: 252,230 RAC: 0 ![]() ![]() |
I downgraded to 6.0 and that seems to have fixed the error issues now. Thanks for all your help in these matters. |
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