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 Sep 7 23:20:23 2026 Auto Mode Machine = Linux oleg231-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-oleg231-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 4461 12998 604849 528618 64 8 4941 29658 901377 901377 64 16 9217 43985 587635 1049372 64 32 9358 72888 1392258 831569 64 64 8027 22857 1232453 1768283 128 4 2320 8901 739689 603357 128 8 6443 19583 824932 870405 128 16 7745 19222 127377 819893 128 32 9127 78388 934004 1074159 128 64 18609 102971 776042 852438 128 128 19592 131399 1598754 1618028 256 4 9094 10979 670332 407058 256 8 14455 23860 977189 691930 256 16 16681 32076 1206714 996229 256 32 18703 23364 868157 510138 256 64 20312 91337 1266495 725106 256 128 19993 138765 1368162 1479379 256 256 28809 112130 1506359 2131261 512 4 10986 16139 586615 450697 512 8 18236 19122 588544 388136 512 16 14283 46515 1158418 775879 512 32 20187 96621 1418599 1150968 512 64 25991 87325 1434711 1355045 512 128 29996 92286 1422357 1835760 512 256 43537 122721 1701913 1730717 512 512 30737 165371 1585086 944444 1024 4 11573 11145 239249 311889 1024 8 13383 37316 689090 450121 1024 16 37897 20028 702273 1021928 1024 32 42565 59129 1340582 751287 1024 64 39290 67779 1071116 1335165 1024 128 36402 96159 1659694 1017088 1024 256 39259 125339 1765437 598201 1024 512 25329 52365 1622698 896689 2048 4 6959 9015 202732 197094 2048 8 6783 21731 616702 449010 2048 16 15346 49136 1249480 1427182 2048 32 23969 31439 584993 848656 2048 64 18263 32647 527708 998039 2048 128 34118 42991 1089981 686985 2048 256 42158 51676 284286 1314489 2048 512 23864 61779 408212 878962 4096 4 6582 6435 301238 221862 4096 8 11158 11698 432744 338207 4096 16 21384 19633 985830 466834 4096 32 26796 38162 1050833 675234 4096 64 31551 34409 828312 478057 4096 128 40805 65854 1958979 1363502 4096 256 41724 57889 1388069 675234 4096 512 39247 53013 1282385 530229 8192 4 8161 8088 213212 377650 8192 8 12623 13926 609433 300447 8192 16 18313 2863 647395 638754 8192 32 19050 26032 695417 514084 8192 64 34349 43071 408292 469640 8192 128 36153 49855 1060164 492247 8192 256 43155 68588 1327306 941290 8192 512 38740 55728 2154106 997935 16384 4 7750 8249 428664 359906 16384 8 15396 13980 587763 219772 16384 16 30673 28527 398279 523063 16384 32 25560 39412 1733379 700498 16384 64 36652 43853 808447 1208173 16384 128 37896 50453 952283 951387 16384 256 45947 59622 1137385 639501 16384 512 37895 60502 1516055 857270 32768 4 7263 8750 272533 174788 32768 8 11925 13048 434606 285254 32768 16 16263 17961 433914 362935 32768 32 24467 32393 857242 647460 32768 64 29500 57492 919337 638340 32768 128 32297 49903 822634 452127 32768 256 43096 55988 781046 789285 32768 512 36523 50014 661817 508165 65536 4