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 Aug 27 09:33:54 2026 Auto Mode Machine = Linux oleg428-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-oleg428-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 1133 2779 488236 528618 64 8 1850 7084 674790 695778 64 16 1664 37872 780776 913649 64 32 1058 20908 1310683 587635 64 64 2237 55752 1255511 1452528 128 4 4305 7437 246632 472262 128 8 6474 5329 780556 193969 128 16 3358 15090 595328 206504 128 32 3107 11353 324823 843068 128 64 3772 6918 531131 1085013 128 128 3003 78572 656477 1755594 256 4 1583 4288 76120 534517 256 8 5773 11723 876662 273160 256 16 6065 16666 526910 651223 256 32 6034 23688 423098 472430 256 64 7834 44154 1048775 1040643 256 128 6493 16744 1128110 697776 256 256 11098 30001 1489641 1361224 512 4 2595 4244 420761 444815 512 8 4838 16184 805264 155808 512 16 7081 10828 261766 512549 512 32 9414 16718 1007827 878386 512 64 9856 17024 1190529 1112797 512 128 15848 18685 469723 566348 512 256 8195 22705 984720 1723770 512 512 12803 46541 250353 2160868 1024 4 4814 3995 199730 139797 1024 8 5541 6268 803127 97283 1024 16 6876 12175 890553 415100 1024 32 24440 46693 1015885 1018777 1024 64 10297 37932 490415 520803 1024 128 21366 35210 1336827 552350 1024 256 13564 35372 670166 1374474 1024 512 13662 81528 289930 1735476 2048 4 4639 4508 120046 157138 2048 8 4504 8703 813686 267817 2048 16 13802 12903 352193 159552 2048 32 9424 18112 1117345 973385 2048 64 14356 26659 435003 392255 2048 128 17884 36477 603233 537683 2048 256 19541 34148 394380 1219155 2048 512 11919 44771 1422220 529464 4096 4 4995 4563 182376 169285 4096 8 12239 10018 298283 232805 4096 16 13578 17077 203780 341794 4096 32 13714 18228 220368 351076 4096 64 21098 30433 327000 441428 4096 128 24968 40568 706095 641810 4096 256 22441 30595 652140 790431 4096 512 26067 36163 608615 725599 8192 4 6653 6524 300303 128230 8192 8 9714 11288 394360 271230 8192 16 7632 10991 506714 108275 8192 32 16362 24010 335050 377983 8192 64 26190 17766 497478 454458 8192 128 20367 30330 933871 741425 8192 256 48233 39891 395996 205797 8192 512 31547 33001 416280 455084 16384 4 6121 3366 142444 159940 16384 8 5145 9071 174838 197804 16384 16 11069 10078 246928 213686 16384 32 11326 23404 308829 341731 16384 64 20419 23722 633266 204049 16384 128 19301 50124 1175318 787509 16384 256 29476 28258 867245 477318 16384 512 26702 40568 688897 1077550 32768 4 5385 6017 188424 148609 32768 8