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: Sat Jul 4 01:18:06 2026 Auto Mode Machine = Linux oleg309-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-oleg309-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 1233 2212 500060 407457 64 8 1823 14032 792299 587635 64 16 3084 19631 1002351 818885 64 32 2802 28141 1336792 1017549 64 64 2473 27093 1204796 1638743 128 4 2806 3318 219596 94042 128 8 7918 20131 187140 870405 128 16 6015 31573 1121270 895074 128 32 8625 40880 1406136 1093856 128 64 4632 43507 1332828 789741 128 128 9013 57273 1579934 2098744 256 4 6753 6514 358534 377572 256 8 3929 7423 894929 802614 256 16 8812 36477 1053922 1003679 256 32 9172 47162 1272498 844929 256 64 17775 59523 327379 1312954 256 128 13507 102732 1437779 1118707 256 256 6787 64547 675391 1023775 512 4 4467 3646 652372 335974 512 8 11909 18390 953671 273188 512 16 13987 25423 868089 861818 512 32 18229 48151 1306409 688118 512 64 13520 37780 1556366 1062161 512 128 19483 43622 1600443 1471074 512 256 13707 49980 924123 700463 512 512 16842 83049 1501940 1783912 1024 4 6193 5092 643170 291979 1024 8 8473 9737 730833 565737 1024 16 10854 24388 306044 257294 1024 32 20606 20789 645199 1081363 1024 64 17860 32126 449696 1170352 1024 128 10867 29966 897438 424160 1024 256 14651 49204 1197769 427538 1024 512 23883 48692 1664841 941093 2048 4 6761 4725 221688 127895 2048 8 6770 9824 392632 318100 2048 16 13471 36860 928359 561110 2048 32 32694 29109 791640 457548 2048 64 23108 42816 476508 392327 2048 128 27474 36922 882394 1276781 2048 256 25910 45929 592253 681102 2048 512 45317 71067 1368084 779853 4096 4 6618 6780 597710 182255 4096 8 12287 9395 534236 274825 4096 16 13697 18594 336650 674122 4096 32 28793 36708 706095 659576 4096 64 24353 20940 526218 547150 4096 128 24742 35203 1674482 808205 4096 256 26122 31654 865057 618274 4096 512 53734 45967 814335 610236 8192 4 6714 7864 398832 339212 8192 8 9934 12859 444660 491451 8192 16 15557 2986 541295 461131 8192 32 25070 26711 498966 507148 8192 64 33534 35860 1084868 617883 8192 128 28994 41194 1022586 973038 8192 256 39229 57672 857711 575570 8192 512 43084 67836 808125 801097 16384 4 5623 5769 368841 249030 16384 8 9865 11134 448508 355833 16384 16 17294 22493 775030 773303 16384 32 20732 31741 851512 771922 16384 64 23946 39079 455452 646207 16384 128 31290 45126 667725 417415 16384 256 36253 40125 923192 1041380 16384 512 35483 49204 1097688 836636 32768 4 5779 5421 232322 199472 32768 8 6715 10582 491420 478875 32768 16 11146 14344 556343 423253 32768 32 19095 25817 976400 762453 32768 64 29854 35083 1093285 841069 32768 128 36798 46282 896034 934756 32768 256