Message boards : Number crunching : Disk space.
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Profile adrianxw

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Message 31718 - Posted: 30 Jul 2017, 8:41:52 UTC

I happened to look at the Disk tab in BOINC Manager. Most projects had a couple of hundred k. I was somehwat suprised to see the usage of LHC. My system, right now, has just a single LHC@Home work unit on it, yet the LHC disk usage is 7.64 GB. Is this actually in use? Are these files base data for applications? Am I seeing a failure to clean up properly?

Wave upon wave of demented avengers march cheerfully out of obscurity into the dream.

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Harri Liljeroos
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Message 31721 - Posted: 30 Jul 2017, 8:54:17 UTC - in response to Message 31718.  

If you have run vbox tasks then that is yes. The disk image files *vdi are very big. I don't have any LHC tasks in my queue at the moment and LHC uses > 8 GB of disk.
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Crystal Pellet
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Message 31722 - Posted: 30 Jul 2017, 8:58:54 UTC - in response to Message 31718.  
Last modified: 30 Jul 2017, 9:02:15 UTC

This is normal for LHC@home.

For each subproject that needs VirtualBox you have a huge vdi-file that's copied to a slot folder creating a virtual Linux-machine including most used science software, libraries etc.

When you have several VM-tasks running and you would suspend them all with 'Leave application in memory' set to OFF, the used disk space for LHC@home could even extend the 20GB.

Remark: Suspending all VM-tasks at once (or shutdown BOINC-client) with many VM's running is not a good idea.
Best is to suspend them first one after another with 1 minute interval to get the VM properly stored to disk.
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Message 31723 - Posted: 30 Jul 2017, 9:39:09 UTC

Understood.

Wave upon wave of demented avengers march cheerfully out of obscurity into the dream.

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Message boards : Number crunching : Disk space.


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