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World Community Grid Forums
Category: Support
Forum: Suggestions / Feedback
Thread: defragment shows boinc files |
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Thread Status: Active Total posts in this thread: 3
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
just curious, i don't think it means much.
----------------------------------------when i run defragment on my computer (after exiting boinc), i see that many of the fragmented files are "boinc slots" etc. any reason for this? this is quad core pc with 3 doing wcg. [Edit 1 times, last edit by Former Member at Oct 2, 2012 8:44:14 PM] |
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Sabrina Tarson
Advanced Cruncher United States Joined: Jun 27, 2012 Post Count: 149 Status: Offline Project Badges: 
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This should happen, as the BOINC Data folder is constantly getting written to, and read from, and files deleted from it. The slots are current jobs to my knowledge. Each core on your CPU, and each GPU core has its own slot folder. Each folder, contains the program that BOINC uses to conduct the research. The reason that gets fragmented, is if you are using a project such as World Community Grid, each individual project has its own programs, and when a core switches projects after one Workunit is deleted, it moves that program from the folder, and moves the program for the next workunit into the slot.
----------------------------------------Its harmless, and I would find it sort of pointless to defrag the BOINC data directory, which on certain defragment software, you can set it to ignore it. ---------------------------------------- [Edit 1 times, last edit by Chase Tarson at Oct 2, 2012 8:45:10 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
See past forum discussion for more detail [if you can be bothered]. Best is to have BOINC in it's own [exclusive] logical partition. Got 20Gb for that [1.4Gb actually used, but when running 8 CEP2 concurrent the 20GB is largely used]. The many thousands of adds, deletes, writes a day don't matter as at the end of the job, the whole content gets deleted again. Since the fragmentation is constant, but in it's own partition, it does not impact the other drives/partitions. Happened to run Auslogic last week and the main drive analysis gave < 0.2% fragmentation and the BOINC drive, used sectors, 30%. Pointless to defrag, except for once in a while to get what is in the /projects folder permanent application/science files sorted proper. Those are the files being continuously copied to the work slots, so those being contiguous ensure long time [fractional] performance gain.
Linux *IS* different. The disk manager when looking for a place to store a file keeps track of the contiguous free spaces and puts a file write in one for optimal performance. |
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