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 Aug 31 14:04:40 2026 Auto Mode Machine = Linux oleg453-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-oleg453-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 1763 9872 421534 528618 64 8 6284 13297 763021 118734 64 16 3145 48888 254971 811459 64 32 9083 31652 1204796 1255511 64 64 2838 65443 1232453 2006158 128 4 2530 11792 272827 324039 128 8 8410 21244 826202 667081 128 16 6667 38299 1102844 780556 128 32 17018 73900 1085013 1133103 128 64 15900 101992 723735 962469 128 128 15873 120298 496272 1939522 256 4 6329 12742 374281 285432 256 8 13752 27551 907792 435276 256 16 8559 26372 870974 962301 256 32 10678 47276 248332 658411 256 64 19274 58499 638445 1132871 256 128 13041 39987 1142514 1280084 256 256 15694 111259 1525622 787890 512 4 6259 5033 312188 145663 512 8 7015 10136 772252 339533 512 16 8909 37875 800163 893740 512 32 10165 18679 1222379 982917 512 64 20476 68021 1276891 1051242 512 128 13051 78720 515131 1358474 512 256 21062 114747 1585086 1057974 512 512 15382 121266 787545 474078 1024 4 6771 5431 164710 132023 1024 8 6635 10448 827737 696578 1024 16 12298 9911 798795 176154 1024 32 34380 25587 993330 883591 1024 64 45263 62215 1187831 779371 1024 128 16562 33707 1395010 397984 1024 256 18198 40255 648903 1235319 1024 512 46099 51853 1172909 520299 2048 4 5971 6427 215920 313583 2048 8 11832 11817 518064 311762 2048 16 8492 16140 239923 616880 2048 32 14529 34629 645044 1065642 2048 64 28881 34535 483836 798483 2048 128 25974 40488 128675 661690 2048 256 21735 33790 168045 625686 2048 512 36580 30697 265869 1376414 4096 4 5354 7982 399412 191472 4096 8 10415 9294 483479 126673 4096 16 13554 29294 542023 587751 4096 32 31152 33489 541152 392980 4096 64 17488 24274 401025 356452 4096 128 34403 49644 442428 660438 4096 256 33661 47238 330988 451545 4096 512 30502 58862 842612 665788 8192 4 6333 7667 267589 272612 8192 8 8761 12690 270506 236523 8192 16 15727 14638 405143 308841 8192 32 21380 24664 566994 390541 8192 64 18903 35239 894416 687871 8192 128 36012 46580 1045423 722848 8192 256 33988 91373 983088 1241956 8192 512 36826 44731 960498 1010229 16384 4 5852 6221 286649 278266 16384 8 9953 13586 357058 620891 16384 16 19526 17956 688262 452733 16384 32 21845 29310 803024 717054 16384 64 22091 27334 543831 387639 16384 128 28029 41489 709261 522948 16384 256 46455 46905 836860 578900 16384 512 37056 72610 1114638 799139 32768 4 6359 7166 210133 163990 32768 8 11613 13488 655924 478960 32768 16 16969 23668 494290 800740 32768 32 23299 33626 455427 327176 32768 64 28780 40370