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 Jul 30 19:03:45 2026 Auto Mode Machine = Linux oleg650-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-oleg650-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 2620 3520 621657 557144 64 8 3243 11496 889431 735831 64 16 7126 38786 792299 852702 64 32 7310 37103 1330167 926260 64 64 3268 59207 524487 1690338 128 4 4126 6160 142375 387686 128 8 7490 19453 819893 621518 128 16 11137 18396 554157 927549 128 32 7107 71632 1152564 969421 128 64 8103 47709 1319723 506097 128 128 13058 80408 566435 1939522 256 4 7685 9685 508929 258309 256 8 9082 25525 977189 794889 256 16 9278 29068 613634 76740 256 32 15217 32981 1286217 1049800 256 64 14867 70079 1369908 1254656 256 128 18054 74308 927393 1549845 256 256 25674 89861 1652404 214928 512 4 6268 7404 373748 256513 512 8 13154 12884 411253 548134 512 16 17992 29953 787834 907717 512 32 17522 35001 728255 954944 512 64 26513 37556 1125630 263113 512 128 13036 85262 1040545 1091863 512 256 23783 40528 1395552 223677 512 512 22791 121589 1729323 1983258 1024 4 5207 7246 335078 488075 1024 8 14604 11065 541828 441378 1024 16 19973 19863 751287 573978 1024 32 23847 62821 679496 1147832 1024 64 29829 68234 532490 355431 1024 128 37982 41412 1326505 1210598 1024 256 31675 57615 776975 227405 1024 512 41183 83360 958739 624376 2048 4 7396 10431 435842 310871 2048 8 10049 10099 595332 495645 2048 16 14405 19808 1038584 486825 2048 32 20970 28173 794055 465887 2048 64 29938 44628 357782 577210 2048 128 41496 47746 1125396 1346636 2048 256 36927 53142 729332 634046 2048 512 53444 68273 507295 719858 4096 4 7998 6966 401729 216685 4096 8 9540 12490 587912 317717 4096 16 18350 18587 793827 675128 4096 32 31620 36709 870933 1045143 4096 64 41026 37768 738004 255695 4096 128 41932 50244 1590168 892748 4096 256 38493 52655 628497 562945 4096 512 35668 44105 275619 384235 8192 4 7315 2463 575647 301531 8192 8 12629 12581 477498 345012 8192 16 19066 20734 703418 537283 8192 32 25887 28318 537351 538631 8192 64 26152 49624 820750 418771 8192 128 39851 46842 721755 678874 8192 256 33185 68133 609076 529443 8192 512 46394 74338 1148624 456021 16384 4 7369 6948 337153 358966 16384 8 10740 13753 525700 430932 16384 16 16752 20944 348100 457246 16384 32 27442 33679 938165 759819 16384 64 25246 42886 634155 353582 16384 128 35942 52699 575946 506994 16384 256 36215 73438 777670 590349 16384 512 40299 66363 1201078 814069 32768 4 7665 7023 331657 299905 32768 8 11762 12702 414826 291402 32768 16 17090 21341 486756 425011 32768 32 21487 34432 962465 491767 32768 64 31750 45553 628738 885521 32768 128 38225 55460 1285271 621606 32768 256 42309 57834 513194 549927 32768 512 39840 53586 617648 503696 65536 4