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Sysadmin_Ed
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Message 4486 - Posted: 17 Jan 2008, 19:39:33 UTC

These files are in c:program files/boinc/BOINC/slots/2 and take up 54 and 11 mb, respectively. The file type is labeled as \"Recovered File Fragments\"

Someone in the BOINC forum said that these files are associated with Cosmology@Home WUs. Is this correct?

If so, they are quickly growing larger and are frequently badly fragmented. What are these, and is something going wrong that I need to know about? Should I do something to manage these files?

I don\'t see any evidence that anything is failing with my work units.

BTW, I defrag my hard drive every other day - that\'s where I noticed them, from the defragmenter\'s report.

Thanks,
Ed
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Message 4487 - Posted: 17 Jan 2008, 20:28:35 UTC

Hey, Déjà Vu. ;-)

Didn\'t I see this before? :-)
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Message 4488 - Posted: 17 Jan 2008, 20:36:24 UTC - in response to Message 4487.  

Hey, Déjà Vu. ;-)

Didn\'t I see this before? :-)


Yes - since I was told that this is a Cosmology@Home issue, I thought that I\'d re-post on this forum to get advice.
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Message 4490 - Posted: 17 Jan 2008, 22:47:12 UTC - in response to Message 4488.  

Hey, Déjà Vu. ;-)

Didn\'t I see this before? :-)


Yes - since I was told that this is a Cosmology@Home issue, I thought that I\'d re-post on this forum to get advice.



I will tell you this Ed....sometimes my hosts virtual/swap memory overloads with C@H files and creates errors in the results if not caught....this typically happens on hosts with lesser ram but not always....this phenomena doesn\'t happen often (less than once a month on 5 hosts). A simple reboot clears it all out.
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Message 4491 - Posted: 17 Jan 2008, 23:24:15 UTC - in response to Message 4490.  

Hey, Déjà Vu. ;-)

Didn\'t I see this before? :-)


Yes - since I was told that this is a Cosmology@Home issue, I thought that I\'d re-post on this forum to get advice.



I will tell you this Ed....sometimes my hosts virtual/swap memory overloads with C@H files and creates errors in the results if not caught....this typically happens on hosts with lesser ram but not always....this phenomena doesn\'t happen often (less than once a month on 5 hosts). A simple reboot clears it all out.


Thanks. I checked my results all the way back to Jan 7 and the outcomes all show \"success\". All of my BOINC projects running have never even come close to maxing out my real or virtual memory (2 GB / 4 GB).
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Message 4494 - Posted: 18 Jan 2008, 1:39:48 UTC

I drained the Cosmology@Home queue (allowed all current WUs to finish with no new work) and those giant files disappeared.

Problem solved!
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Message 4495 - Posted: 18 Jan 2008, 5:19:16 UTC

Those are checkpointing files. If CAMB crashes or stops for some reason, it will read those files the next time it is run and resume from where it left off.

As soon as CAMB completes a WU, those files should be deleted.
Scott Kruger
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Message 4499 - Posted: 18 Jan 2008, 14:36:25 UTC

I think what happens in the scenario I was talking about is that some of the files don\'t get erased and it is like a snowball rolling downhill getting bigger and bigger til it overloads the memory....this process is very slow to occur and if you look at the memory and swap usage in the system monitor you can see this and reboot before that overload happens.
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Forums : Technical Support : Files camb_scalarcls.chk and camb_tensorcls.chk