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: Thu Aug 27 04:23:40 2026 Auto Mode Machine = Linux oleg608-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-oleg608-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 3124 7189 516414 179699 64 8 1127 6625 211899 688639 64 16 4289 28481 1033216 852702 64 32 2021 52328 1105556 842003 64 64 5121 47369 877797 1562436 128 4 3605 5358 598647 211632 128 8 3807 7052 443033 718889 128 16 7403 26583 1007629 847059 128 32 3935 43084 1243315 1057236 128 64 8410 30302 1152564 1231904 128 128 6821 63491 421139 1543594 256 4 3565 7244 580461 338633 256 8 8550 8527 663292 775373 256 16 4391 13375 448362 873098 256 32 6224 26871 1312954 648079 256 64 13126 35237 1543163 1254656 256 128 15156 60049 1453348 1347557 256 256 14952 50039 723153 1514860 512 4 2932 4167 577932 440979 512 8 11028 14291 225533 570713 512 16 14629 27685 903136 786391 512 32 17608 49492 1242896 566348 512 64 24400 59075 901241 1057454 512 128 14897 63232 1518938 684608 512 256 19160 95973 941133 899731 512 512 10647 60873 520248 1600443 1024 4 3851 3424 269974 372898 1024 8 4189 5630 385689 217084 1024 16 6320 10564 1022902 382972 1024 32 11985 19384 338511 844168 1024 64 23835 22040 1357961 391561 1024 128 24454 26505 218431 444070 1024 256 16489 70815 1703807 622115 1024 512 28715 55767 1501313 1340164 2048 4 8650 10035 327213 231068 2048 8 9046 13829 939426 442533 2048 16 16470 31505 860472 831890 2048 32 21461 54232 438154 643401 2048 64 28638 55591 617589 749374 2048 128 16273 33313 481314 1252577 2048 256 34398 57652 1410311 936354 2048 512 19710 60403 1344739 384168 4096 4 5639 4730 138014 156947 4096 8 7989 11601 208372 230448 4096 16 15853 9193 439385 394415 4096 32 10770 19707 720849 374682 4096 64 32940 30527 478790 816269 4096 128 33921 28079 784368 671802 4096 256 28469 31107 1252194 851170 4096 512 43134 64330 987246 529461 8192 4 6325 9353 282394 157214 8192 8 8532 10929 543058 358119 8192 16 12590 19690 596690 614512 8192 32 17395 23509 539621 601601 8192 64 24581 27257 584182 722073 8192 128 40502 30258 1020430 590842 8192 256 33604 53516 1183153 519399 8192 512 27839 60803 808373 846011 16384 4 6340 7166 285271 235894 16384 8 10584 10855 543053 322501 16384 16 12812 15505 540439 455467 16384 32 20533 25886 719035 526103 16384 64 24636 30829 742673 838995 16384 128 28619 40905 1045961 713925 16384 256 32106 49004 901749 848474 16384 512 35820 48043 354204 458922 32768 4 5795 7050 305099 298814 32768 8 11881 13791 429789 485976 32768 16 16854 20806 625055 377533 32768 32 27247 31688 642899 731020 32768 64 29464 36808 901878 371578 32768 128 27662 43370 450610 500375 32768 256