very slow file copying on same disk

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On Ubuntu 16.02 LTS the copying time for a 1 MB file between directories on the same disk starts at about 0.02 seconds and increases to over 10 seconds as the session progresses. I am mainly using my own Fortran programs and none of them show any specific problems.







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  • 1




    I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
    – guiverc
    Apr 21 at 23:26











  • In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
    – waltinator
    Apr 22 at 3:21















up vote
0
down vote

favorite












On Ubuntu 16.02 LTS the copying time for a 1 MB file between directories on the same disk starts at about 0.02 seconds and increases to over 10 seconds as the session progresses. I am mainly using my own Fortran programs and none of them show any specific problems.







share|improve this question
















  • 1




    I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
    – guiverc
    Apr 21 at 23:26











  • In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
    – waltinator
    Apr 22 at 3:21













up vote
0
down vote

favorite









up vote
0
down vote

favorite











On Ubuntu 16.02 LTS the copying time for a 1 MB file between directories on the same disk starts at about 0.02 seconds and increases to over 10 seconds as the session progresses. I am mainly using my own Fortran programs and none of them show any specific problems.







share|improve this question












On Ubuntu 16.02 LTS the copying time for a 1 MB file between directories on the same disk starts at about 0.02 seconds and increases to over 10 seconds as the session progresses. I am mainly using my own Fortran programs and none of them show any specific problems.









share|improve this question











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asked Apr 21 at 23:09









davd

11




11







  • 1




    I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
    – guiverc
    Apr 21 at 23:26











  • In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
    – waltinator
    Apr 22 at 3:21













  • 1




    I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
    – guiverc
    Apr 21 at 23:26











  • In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
    – waltinator
    Apr 22 at 3:21








1




1




I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
– guiverc
Apr 21 at 23:26





I suspect its a fortran coding issue or compiler option and not Ubuntu related (assuming a cp of the same files is quick). I'd suggest checking your code, then check compiler options (even the C code generated depending on compiler you are using). there was no february release in 2016, its 16.04 as it was in April
– guiverc
Apr 21 at 23:26













In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
– waltinator
Apr 22 at 3:21





In a separate terminal window, watch journalctl --follow as you do your copies. That will show all log messages, including disk failures. Also, do you have swap space defined?
– waltinator
Apr 22 at 3:21
















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