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: Fri Jun 12 12:22:46 2026 Auto Mode Machine = Linux oleg616-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-oleg616-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 5971 16169 639427 217743 64 8 11611 16040 182385 752329 64 16 14821 35494 440921 752329 64 32 17737 72908 1183548 743988 64 64 10902 75641 1526887 1336792 128 4 6022 9117 453896 264493 128 8 8108 12759 919605 805138 128 16 12930 43140 795593 864797 128 32 25147 56436 1303699 1243315 128 64 8283 64552 1346196 416888 128 128 18414 41279 1539168 643108 256 4 6463 6268 395659 207614 256 8 6454 20029 705107 416856 256 16 17722 23096 1147398 794889 256 32 12243 25919 894929 842278 256 64 15321 39048 1254656 1278559 256 128 23415 85647 1570244 817898 256 256 12159 108945 1743637 1362952 512 4 13709 8480 254326 485767 512 8 19965 24034 279336 677267 512 16 17701 28542 1108203 909255 512 32 42380 27756 1306409 1120344 512 64 11718 47478 300860 1026126 512 128 34515 112647 1011625 771143 512 256 52021 45604 1711407 1747618 512 512 39757 170437 1488408 1306409 1024 4 11539 9139 242081 312025 1024 8 21344 19123 275127 592261 1024 16 33446 44632 385551 927477 1024 32 31704 45497 195271 468841 1024 64 47402 83313 779938 1194770 1024 128 18429 49975 1278718 478078 1024 256 64374 58628 1273410 1442326 1024 512 35342 121255 1196101 1331853 2048 4 7356 8353 468862 239255 2048 8 14260 12540 533874 453898 2048 16 20407 32589 534871 638571 2048 32 20346 46169 461357 495902 2048 64 29024 48293 1034333 1389551 2048 128 33818 78155 970196 916376 2048 256 27650 66265 1513429 1400653 2048 512 48476 73252 998503 1094007 4096 4 10797 11967 239742 309386 4096 8 17157 24061 244846 558952 4096 16 30707 30755 553140 298107 4096 32 25885 35069 952331 814605 4096 64 40661 46552 1405098 450550 4096 128 38736 58709 975253 751301 4096 256 47784 51428 1062006 1154110 4096 512 36408 85025 971557 1322565 8192 4 8924 9225 288146 389947 8192 8 14924 2756 246250 390319 8192 16 19377 21258 519501 468245 8192 32 26854 33701 725213 687431 8192 64 33667 37767 747994 799606 8192 128 40325 53151 952009 309388 8192 256 36022 60198 664935 433092 8192 512 45278 70365 719292 405765 16384 4 8734 10435 209006 228062 16384 8 17148 19150 329452 360992 16384 16 23026 34767 441404 460586 16384 32 35278 55699 1235788 736229 16384 64 32118 46757 606099 843185 16384 128 38289 52129 862001 680143 16384 256 47353 74657 962797 531811 16384 512 53456 76047 506538 932234 32768 4 8974 10206 303474 253791 32768 8 15630 16959 280882 318123 32768 16 20131 18354 460566 681359 32768 32 24089 34356 541190 411198 32768 64 31495 43116 525549 611492 32768 128 42473 86640 685491 484395 32768 256 46372 78975 703524 576341 32768 512 42944 69583 454271 964471 65536 4