Iozone: Performance Test of File I/O Version $Revision: 3.483 $ 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: Mon May 25 03:23:22 2026 Auto Mode Machine = Linux oleg245-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg245-client.virtnet/iozone-file 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. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 2410 10481 232854 581273 64 8 1838 14100 688639 205886 64 16 3854 10615 842003 158480 64 32 3868 39413 1484662 653436 64 64 2901 50669 929467 1526887 128 4 2624 8172 248919 499970 128 8 5266 12773 201542 659704 128 16 2723 34583 1231904 841746 128 32 5001 51697 819893 789741 128 64 4665 40176 80348 1278855 128 128 8719 68743 1040839 2211113 256 4 4843 10636 508929 297286 256 8 4908 9119 582035 731528 256 16 9696 26834 873809 817898 256 32 11567 53951 524593 493264 256 64 9147 77126 1148625 495084 256 128 7926 48967 727563 1201314 256 256 18466 27896 1581810 1752173 512 4 4829 5098 223398 257931 512 8 8707 15302 774480 572081 512 16 9584 23509 915847 429170 512 32 17134 40432 1191189 772252 512 64 20237 38369 666753 963945 512 128 15989 67627 1118011 1340664 512 256 18430 65438 1410215 511572 512 512 23590 70193 1254513 1351633 1024 4 4801 5087 289754 566035 1024 8 5496 12332 1171629 393067 1024 16 16020 20399 431880 922497 1024 32 18603 41325 433187 175492 1024 64 19820 33249 438583 892775 1024 128 24549 79539 395528 1232130 1024 256 20105 54832 437244 684478 1024 512 32129 32504 607680 176003 2048 4 4008 7364 237587 208783 2048 8 13602 23751 190528 490774 2048 16 17784 25264 377168 458574 2048 32 19020 23105 348535 133324 2048 64 17307 18791 218708 473958 2048 128 29634 95079 1039590 1519319 2048 256 12669 43708 660012 544259 2048 512 41194 49006 253436 1223496 4096 4 4629 5364 784046 407078 4096 8 9599 6246 391182 242887 4096 16 7211 10825 444926 537377 4096 32 10512 10201 710504 307097 4096 64 24508 36618 350417 567632 4096 128 26170 37675 341902 300075 4096 256 35819 30394 158765 450799 4096 512 17565 19335 1842581 505174 8192 4 3952 2153 129509 221945 8192 8 8885 9000 270300 300537 8192 16 14681 21930 276896 147971 8192 32 11713 15283 632196 321862 8192 64 19219 21003 515410 823326 8192 128 30544 24523 435811 597864 8192 256 29578 45041 1105674 408845 8192 512 43791 40980 552320 718149 16384 4 5755 4887 404644 339726 16384 8 7654 8146 515092 389160 16384 16 13859 22402 662332 574857 16384 32 23142 22442 708588 616772 16384 64 19108 23471 754017 692828 16384 128 29261 50955 781944 564204 16384 256 27872 37607 978034 814078 16384 512 35853 46526 612277 880727 32768 4 5549 5399 184883 247543 32768 8 10389 9136 466746 432443 32768 16 11768 15832 609002 373330 32768 32