[Darshan-users] Unable to create log:

[Snyder, Shane]

Hi Hassan,

Would you try setting the following environment variable prior to running your application?

export DARSHAN_LOGHINTS="romio_no_indep_rw=true;cb_nodes=1"

Maybe that will work out better when writing Darshan logs to an NFS mount.

Thanks,
--Shane
________________________________
From: Darshan-users <darshan-users-bounces at lists.mcs.anl.gov> on behalf of Hassan Asghar <haxxanasghar at gmail.com>
Sent: Thursday, July 15, 2021 4:14 AM
To: darshan-users at lists.mcs.anl.gov <darshan-users at lists.mcs.anl.gov>
Subject: [Darshan-users] Unable to create log:

I have three gpus. darshan and darshan-logs are installed and shared via nfs. all permissions are set. I don't know why logs are not created:






[haxxanasghar at gpuserver2 ~]$ mpiexec -n 64 -f machinefile -env LD_PRELOAD=/home/haxxanasghar/darshan/darshan-runtime/lib/libdarshan.so ./MADbench2 640 80 4 1 8 4 4

MADbench 2.0 IO-mode
no_pe = 64  no_pix = 640  no_bin = 80  no_gang = 4  sblocksize = 1  fblocksize = 8  r_mod = 4  w_mod = 4
IOMETHOD = POSIX  IOMODE = SYNC  FILETYPE = UNIQUE  REMAP = CUSTOM

S_cc         0.03   [      0.03:      0.03]
S_bw         0.02   [      0.02:      0.02]
S_w          0.03   [      0.03:      0.03]
          -------
S_total      0.08   [      0.08:      0.08]

W_cc         0.12   [      0.07:      0.14]
W_bw         0.77   [      0.72:      0.85]
W_r          0.02   [      0.02:      0.02]
W_w          0.01   [      0.01:      0.01]
          -------
W_total      0.92   [      0.89:      0.95]

C_cc         0.01   [      0.01:      0.01]
C_bw         0.00   [      0.00:      0.00]
C_r          0.01   [      0.00:      0.01]
          -------
C_total      0.02   [      0.02:      0.02]


dC[0] = 0.00000e+00
darshan_library_warning: unable to create log file /home/haxxanasghar/darshan-logs/2021/7/15/haxxanas_MADbench2_id17444-17444_7-15-65476-1341319014666854881.darshan_partial.


--
Regards,

Hassan Asghar
Ph.D Scholar
Mobile: +82-010-9686-1912
Personal Website: http://bit.ly/2OQ0egs
Google Scholar: https://bit.ly/3lVYuxF
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