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The following command is an example to run the IOR N-1 performance tests, and Table 8 describes the IOR command line options typically used:
mpirun --allow-run-as-root -np $Threads --hostfile my_hosts.$Threads --mca btl_openib_allow_ib 1 --mca pml ^ucx --oversubscribe --prefix /usr/mpi/gcc/openmpi-4.1.2a1 /usr/local/bin/ior -a POSIX -v -i 3 -d 3 -e -k -o /mmfs1/perftest/ior/tst.file -w -r -g -s 1 -t 16m -b ${FileSize}G
Option |
Description |
-g |
intraTestBarriers – use barriers between open, write/read, and close |
-d |
interTestDelay – delay between reps in seconds |
-e |
fsync – perform fsync upon POSIX write close |
-E |
useExistingTestFile – do not remove test file before write access |
-k |
keepFile – don’t remove the test fil (s) on program exit |
-o |
testFile – full name for test |
-s |
segmentCount – number of segments |