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: Tue Sep 8 00:14:27 2026 Auto Mode Machine = Linux oleg441-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-oleg441-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 2594 8599 557144 435202 64 8 2977 6349 314030 566551 64 16 3929 9933 1017549 97726 64 32 4592 36320 1304314 1002351 64 64 2175 80398 998622 1124074 128 4 2782 2943 430942 509943 128 8 3379 5299 785122 477725 128 16 3574 9155 852438 731625 128 32 11412 31418 1278855 1032829 128 64 4516 57042 1421023 1294270 128 128 5557 59646 1240443 1827299 256 4 3609 3441 173329 64891 256 8 3574 8466 412849 288655 256 16 4737 8277 910872 412215 256 32 7123 12264 1044693 408297 256 64 8653 24712 797843 703260 256 128 18902 35276 151384 1407621 256 256 9837 35135 962301 443730 512 4 4683 4667 554074 513039 512 8 13604 6335 625030 89293 512 16 5942 14772 644153 997991 512 32 16015 15384 730484 1191189 512 64 19305 79788 1213400 967855 512 128 21964 36750 1135150 1216149 512 256 34808 54427 1551867 678980 512 512 17365 88062 493696 1273861 1024 4 4638 5703 314884 163084 1024 8 11922 10321 754057 709700 1024 16 22069 26661 858340 222320 1024 32 12190 24435 536347 746846 1024 64 28770 57547 1219189 926676 1024 128 25274 71409 335182 364945 1024 256 37480 77640 1410125 112123 1024 512 20333 96475 1001903 1111877 2048 4 5156 4700 288729 189385 2048 8 10171 11045 391219 164643 2048 16 9245 17648 1142763 892386 2048 32 19246 15866 132318 1057899 2048 64 17745 44441 430146 504939 2048 128 33247 36070 225004 394001 2048 256 28051 37599 773393 702089 2048 512 25190 48846 345423 644802 4096 4 4354 5511 364058 214955 4096 8 6382 7905 330828 454965 4096 16 15431 18319 514832 494387 4096 32 15708 18892 646885 276493 4096 64 18712 24258 863014 382950 4096 128 22612 24355 581308 110685 4096 256 32701 41855 445561 725599 4096 512 32882 51551 534518 439205 8192 4 4461 5535 116022 206513 8192 8 9024 6174 368063 588837 8192 16 14029 25289 669287 482534 8192 32 18397 19510 339325 514800 8192 64 23623 38262 680231 590710 8192 128 27384 33624 865140 874564 8192 256 29442 46168 1159047 967176 8192 512 21613 32572 462018 524185 16384 4 5129 5626 283926 132024 16384 8 8733 8958 416863 301903 16384 16 14246 16733 468477 494926 16384 32 20115 20212 469832 443626 16384 64 18798 28449 584101 586169 16384 128 27077 26600 767508 677534 16384 256 27250 34807 422978 513587 16384 512 35862 45326 1019670 364867 32768 4