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 Aug 21 22:43:12 2026 Auto Mode Machine = Linux oleg333-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-oleg333-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 2510 6814 538156 270108 64 8 5848 19571 457452 720041 64 16 7311 34935 219883 983980 64 32 4988 18391 889431 1124074 64 64 2966 26230 1143223 1828508 128 4 4205 4553 316028 78872 128 8 5269 24123 921183 770474 128 16 4338 27724 1085013 927549 128 32 8258 42525 1319723 184694 128 64 12559 90021 1278855 336848 128 128 10392 98008 1526043 819893 256 4 8855 3438 251002 178903 256 8 6186 18790 958864 656399 256 16 9361 8979 532397 924200 256 32 6768 51437 1180188 587127 256 64 8601 37198 374804 1286217 256 128 15504 32615 1079348 75653 256 256 8218 82743 635047 37224 512 4 3891 7020 248068 540681 512 8 11046 13323 79800 526756 512 16 10890 12830 469723 803757 512 32 30449 19559 1130370 483470 512 64 10047 43963 530530 420020 512 128 18268 55664 244037 644733 512 256 13742 45625 1391032 1635797 512 512 15239 44210 191332 1177473 1024 4 8353 4480 266523 489912 1024 8 14029 7289 281382 200870 1024 16 13173 17580 250117 207328 1024 32 15135 24395 696126 854073 1024 64 25846 64386 854073 527002 1024 128 44866 57041 664464 392923 1024 256 34837 39284 1750329 880512 1024 512 24745 44481 1189146 263514 2048 4 6564 6639 201179 396053 2048 8 11892 14452 388178 844235 2048 16 7741 18909 384168 807263 2048 32 14015 20944 257740 389569 2048 64 17366 26123 331021 312579 2048 128 19294 27928 412386 580173 2048 256 28361 40625 724411 268487 2048 512 30287 35910 1352786 235755 4096 4 4413 7388 143987 381988 4096 8 1479 7003 197359 241620 4096 16 11881 17671 569269 506365 4096 32 24776 23150 368715 469231 4096 64 25768 42211 351558 380280 4096 128 33254 44533 620037 980149 4096 256 33939 37857 1113060 1046225 4096 512 31003 50636 1695470 513355 8192 4 7161 7176 247187 271284 8192 8 11841 16772 583438 501040 8192 16 15932 19878 464925 274338 8192 32 24814 23222 619386 399022 8192 64 20751 32087 487504 435601 8192 128 30211 35452 988661 523849 8192 256 30692 43873 915922 693116 8192 512 35167 37257 793567 307115 16384 4 4017 4759 226583 227869 16384 8 10288 10377 466581 238254 16384 16 15533 23781 705931 410101 16384 32 17013 26084 376246 319819 16384 64 26303 24171 514041 530534 16384 128 24762 43891 1005835 252376 16384 256 23663 42196 1139365 628603 16384 512 31980 53152 697547 439743 32768 4 5764 6452 200988 162793 32768 8