[Darshan-users] Logs not generated inspite throwing warning message

[Hassan Asghar]

Ok, thank you so much. I try nfs.

On Tue, 22 Jun 2021, 2:58 am Phil Carns, <carns at mcs.anl.gov> wrote:

> Ah, Ok.  This is the problem then.  The log directory has to be on a
> shared file system (e.g. nfs, lustre, etc.) that is visible to all nodes.
> The log is created and written using collective I/O operations, so all of
> the ranks need to be able to access the same file simultaneously.
>
> I'll open a ticket to investigate if there is a way to produce a more
> helpful error message in this case.
>
> thanks,
>
> -Phil
> On 6/21/21 5:50 PM, Hassan Asghar wrote:
>
> it is not shared directory, but i have install the same version of darshan
> on the other nodes as well.
>
>
> --
> Regards,
>
> *Hassan Asghar*
> MS Computer Science
> Mobile: +92-321-1741755
> Personal Website: http://bit.ly/2OQ0egs
> Google Scholar: https://bit.ly/3lVYuxF
>
>
> On Mon, Jun 21, 2021 at 10:30 PM Phil Carns <carns at mcs.anl.gov> wrote:
>
>> Hi Hassan,
>>
>> Is /darshan-logs/ a shared directory?
>>
>> thanks,
>>
>> -Phil
>> On 6/21/21 1:04 PM, Hassan Asghar wrote:
>>
>> Yes, I have set the log path and all permission are given when i run
>> program on local machine it execute successfully but when i exceute on
>> three nodes it show error.
>>
>> On Tue, 22 Jun 2021, 1:18 am Harms, Kevin, <harms at alcf.anl.gov> wrote:
>>
>>> Hassan,
>>>
>>>   did you create the  /darshan-logs directory? Looks like it might not
>>> be writeable.
>>>
>>>   try: /darshan-logs/2021/6/21
>>>
>>>   if you want to try a quick test, set DARSHAN_LOGFILE to the path/name
>>> of the log, like:
>>>
>>>   DARSHAN_LOGFILE=/path/I/can/write/to/logfile.darshan
>>>
>>> kevin
>>>
>>> ________________________________________
>>> From: Darshan-users <darshan-users-bounces at lists.mcs.anl.gov> on behalf
>>> of Hassan Asghar <haxxanasghar at gmail.com>
>>> Sent: Monday, June 21, 2021 12:35 AM
>>> To: darshan-users at lists.mcs.anl.gov
>>> Subject: [Darshan-users] Logs not generated inspite throwing warning
>>> message
>>>
>>> I am running darshan with mpich on a three-node cluster and my job
>>> executed successfully but not generated logs. error warning is given below
>>> at the end of the execution.
>>>
>>> [haxxanasghar at gpuserver2 ~]$ mpiexec -n 64 -f machinefile -env
>>> LD_PRELOAD /usr/l
>>>
>>>                        ocal/lib/libdarshan.so ./MADbench2 640 80 4 8 8 4 4
>>>
>>> MADbench 2.0 IO-mode
>>> no_pe = 64  no_pix = 640  no_bin = 80  no_gang = 4  sblocksize = 8
>>> fblocksize =
>>>
>>>                   8  r_mod = 4  w_mod = 4
>>> IOMETHOD = POSIX  IOMODE = SYNC  FILETYPE = UNIQUE  REMAP = CUSTOM
>>>
>>> S_cc         0.02   [      0.02:      0.03]
>>> S_bw         0.01   [      0.01:      0.01]
>>> S_w          0.03   [      0.03:      0.04]
>>>           -------
>>> S_total      0.07   [      0.07:      0.07]
>>>
>>> W_cc         0.04   [      0.03:      0.05]
>>> W_bw         0.22   [      0.20:      0.23]
>>> W_r          0.02   [      0.02:      0.02]
>>> W_w          0.01   [      0.01:      0.01]
>>>           -------
>>> W_total      0.28   [      0.28:      0.29]
>>>
>>> C_cc         0.01   [      0.01:      0.01]
>>> C_bw         0.00   [      0.00:      0.00]
>>> C_r          0.01   [      0.01:      0.01]
>>>           -------
>>> C_total      0.02   [      0.02:      0.02]
>>>
>>>
>>> dC[0] = 0.00000e+00
>>> darshan_library_warning: unable to create log file
>>> /darshan-logs/2021/6/21/haxxa
>>>
>>>
>>>  nas_MADbench2_id29484-29484_6-21-52165-1341319014666854881.darshan_partial.
>>> [haxxanasghar at gpuserver2 ~]$
>>>
>>>
>>> --
>>> Regards,
>>>
>>> Hassan Asghar
>>> MS Computer Science
>>> Mobile: +92-321-1741755
>>> Personal Website: http://bit.ly/2OQ0egs
>>> Google Scholar: https://bit.ly/3lVYuxF
>>>
>>
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>
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