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 Jul 13 15:21:19 2026 Auto Mode Machine = Linux oleg451-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-oleg451-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 1356 5715 516414 491815 64 8 2398 24205 712397 855419 64 16 3185 18675 866463 295047 64 32 1986 32921 524487 703068 64 64 3072 54374 942521 1679761 128 4 2627 4330 43641 481582 128 8 2831 5177 1000121 370816 128 16 3150 9966 1123617 805138 128 32 3970 37136 1185654 1017175 128 64 2754 16044 1196221 1266785 128 128 3552 39952 901083 2066432 256 4 5424 5728 171584 110960 256 8 3934 13179 532397 753077 256 16 8957 18021 564887 721210 256 32 10829 9592 1354356 1062263 256 64 8400 33242 659625 766517 256 128 14056 64177 1415041 995306 256 256 6266 63411 1384034 1755037 512 4 4920 8050 293419 525210 512 8 3851 9598 973118 801059 512 16 7251 23387 1089647 186109 512 32 8174 39390 141367 665720 512 64 13073 47508 1180062 540681 512 128 11803 21845 761841 220893 512 256 13836 50364 1551867 170046 512 512 19543 57309 1874212 1045103 1024 4 3958 9218 195458 155508 1024 8 11630 8322 410224 361048 1024 16 19667 31362 583491 542375 1024 32 23420 41977 455515 821876 1024 64 17890 42960 916004 793189 1024 128 17932 40954 979734 565067 1024 256 14739 25561 974400 371703 1024 512 22511 45265 109705 418988 2048 4 6314 5436 309092 161529 2048 8 6125 8442 573664 156096 2048 16 20851 14621 265426 628617 2048 32 20168 20230 318112 790765 2048 64 22133 28628 1245855 613181 2048 128 26988 30909 773742 1286533 2048 256 21675 48016 1092894 715124 2048 512 37838 36853 611174 1451295 4096 4 4932 4279 221299 229816 4096 8 8890 9175 343221 479967 4096 16 15952 14526 448434 440195 4096 32 22226 33470 1331999 801082 4096 64 22354 55278 976583 1128042 4096 128 32533 37452 1620313 627258 4096 256 29020 64877 1147021 968326 4096 512 32851 47850 671146 749237 8192 4 4689 1964 529811 359408 8192 8 10718 8011 562953 249056 8192 16 14651 16115 427265 425140 8192 32 20116 26050 722407 489128 8192 64 26264 31538 833452 650668 8192 128 26041 39085 685305 800314 8192 256 33852 33263 439980 657882 8192 512 32486 45779 937080 462378 16384 4 4772 4557 285922 157578 16384 8 8894 8590 554619 481769 16384 16 10618 15545 379443 512175 16384 32 18582 23651 373918 214108 16384 64 20685 26975 428541 363595 16384 128 18822 33775 539531 338786 16384 256 28338 30824 1476447 924707 16384 512 28490 35496 390467 795191 32768 4 3721 4070 173086 158512 32768 8