$ sudo sh -c "/usr/bin/echo 3 > /proc/sys/vm/drop_caches"
$ iozone -t1 -i0 -i2 -r1k -s16g -F /scratch/cassagnea/testfile
    Iozone: Performance Test of File I/O
            Version $Revision: 3.506 $
        Compiled for 64 bit mode.
        Build: linux-AMD64

    Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
                 Al Slater, Scott Rhine, Mike Wisner, Ken Goss
                 Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
                 Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
                 Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
                 Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
                 Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
                 Vangel Bojaxhi, Ben England, Vikentsi Lapa,
                 Alexey Skidanov, Sudhir Kumar.

    Run began: Sun May 11 12:47:13 2025

    Record Size 1 kB
    File size set to 16777216 kB
    Command line used: iozone -t1 -i0 -i2 -r1k -s16g -F /scratch/cassagnea/testfile
    Output is in kBytes/sec
    Time Resolution = 0.000001 seconds.
    Processor cache size set to 1024 kBytes.
    Processor cache line size set to 32 bytes.
    File stride size set to 17 * record size.
    Throughput test with 1 process
    Each process writes a 16777216 kByte file in 1 kByte records

    Children see throughput for  1 initial writers  = 1771244.50 kB/sec
    Parent sees throughput for  1 initial writers   = 1518142.65 kB/sec
    Min throughput per process                      = 1771244.50 kB/sec
    Max throughput per process                      = 1771244.50 kB/sec
    Avg throughput per process                      = 1771244.50 kB/sec
    Min xfer                                        = 16777216.00 kB

    Children see throughput for  1 rewriters        = 2607659.50 kB/sec
    Parent sees throughput for  1 rewriters         = 1906543.21 kB/sec
    Min throughput per process                      = 2607659.50 kB/sec
    Max throughput per process                      = 2607659.50 kB/sec
    Avg throughput per process                      = 2607659.50 kB/sec
    Min xfer                                        = 16777216.00 kB

    Children see throughput for 1 random readers    = 1207847.38 kB/sec
    Parent sees throughput for 1 random readers     = 1206266.29 kB/sec
    Min throughput per process                      = 1207847.38 kB/sec
    Max throughput per process                      = 1207847.38 kB/sec
    Avg throughput per process                      = 1207847.38 kB/sec
    Min xfer                                        = 16777216.00 kB

    Children see throughput for 1 random writers    =  985909.38 kB/sec
    Parent sees throughput for 1 random writers     =  849658.09 kB/sec
    Min throughput per process                      =  985909.38 kB/sec
    Max throughput per process                      =  985909.38 kB/sec
    Avg throughput per process                      =  985909.38 kB/sec
    Min xfer                                        = 16777216.00 kB



iozone test complete.