IOR Benchmark Samsung 860 EVO 250GB. Made JFF because https://www.phoronix.com/scan.php?page=article&item=wd-black-sn850&num=2

output.log

ior/src on  master [?] 
❯ /usr/lib64/mpich/bin/mpirun -n 64 ./ior -t 1m -b 16m -s 16
IOR-3.4.0+dev: MPI Coordinated Test of Parallel I/O
Began               : Thu Dec  3 19:27:06 2020
Command line        : ./ior -t 1m -b 16m -s 16
Machine             : Linux laptop.local
TestID              : 0
StartTime           : Thu Dec  3 19:27:06 2020
Path                : testFile
FS                  : 151.8 GiB   Used FS: 62.4%   Inodes: 0.0 Mi   Used Inodes: -nan%

Options: 
api                 : POSIX
apiVersion          : 
test filename       : testFile
access              : single-shared-file
type                : independent
segments            : 16
ordering in a file  : sequential
ordering inter file : no tasks offsets
nodes               : 1
tasks               : 64
clients per node    : 64
repetitions         : 1
xfersize            : 1 MiB
blocksize           : 16 MiB
aggregate filesize  : 16 GiB

Results: 

access    bw(MiB/s)  IOPS       Latency(s)  block(KiB) xfer(KiB)  open(s)    wr/rd(s)   close(s)   total(s)   iter
------    ---------  ----       ----------  ---------- ---------  --------   --------   --------   --------   ----
write     369.81     369.81     2.63        16384      1024.00    0.150090   44.30      8.43       44.30      0   
read      352.96     352.96     2.55        16384      1024.00    0.143398   46.42      5.71       46.42      0   

Summary of all tests:
Operation   Max(MiB)   Min(MiB)  Mean(MiB)     StdDev   Max(OPs)   Min(OPs)  Mean(OPs)     StdDev    Mean(s) Stonewall(s) Stonewall(MiB) Test# #Tasks tPN reps fPP reord reordoff reordrand seed segcnt   blksiz    xsize aggs(MiB)   API RefNum
write         369.81     369.81     369.81       0.00     369.81     369.81     369.81       0.00   44.30350         NA            NA     0     64  64    1   0     0        1         0    0     16 16777216  1048576   16384.0 POSIX      0
read          352.96     352.96     352.96       0.00     352.96     352.96     352.96       0.00   46.41854         NA            NA     0     64  64    1   0     0        1         0    0     16 16777216  1048576   16384.0 POSIX      0
Finished            : Thu Dec  3 19:28:40 2020