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 Apr 9 16:04:21 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 1898 6387 659861 576282 64 8 4152 4193 190405 688639 64 16 2628 28725 1049372 500060 64 32 6949 42813 1249666 998622 64 64 5180 53252 1163036 1734015 128 4 2939 6308 659704 501839 128 8 2607 10103 578645 731625 128 16 5743 9194 643108 581781 128 32 4903 12972 707520 908709 128 64 11067 30902 1229084 1332828 128 128 7539 84429 1349580 402510 256 4 4391 8098 562520 337675 256 8 9309 3601 984356 331626 256 16 10217 24180 1168627 759469 256 32 10050 39464 183645 408918 256 64 7718 17103 277037 1212164 256 128 5545 90110 1600674 1471270 256 256 17654 108384 934659 1952947 512 4 6442 5476 450791 443712 512 8 9468 8781 530006 253725 512 16 6976 11039 1135150 470959 512 32 10158 17199 1216149 686358 512 64 13670 34510 1829505 1299295 512 128 13080 50828 1395552 988345 512 256 16353 64144 1705969 1759070 512 512 20350 89244 1770674 1712772 1024 4 6723 5138 400134 585879 1024 8 7720 7103 113916 231887 1024 16 11868 10464 827258 1034481 1024 32 24182 24519 1374474 384825 1024 64 15901 57245 1097388 1288307 1024 128 30457 66076 1687075 661089 1024 256 27224 35819 256710 1092642 1024 512 27735 47568 444254 1024121 2048 4 5837 5684 180154 301001 2048 8 9959 10172 137285 391059 2048 16 10697 17389 1126577 176005 2048 32 12086 49655 1036955 450494 2048 64 25569 22988 1278301 1319740 2048 128 34967 37368 1620190 353352 2048 256 23766 38264 567636 796854 2048 512 20013 68845 851263 729890 4096 4 5088 6375 131281 222114 4096 8 15859 12116 454351 465241 4096 16 11512 13464 452544 670491 4096 32 22877 42417 1422197 685308 4096 64 35169 36219 818720 693861 4096 128 22277 46918 1499795 362997 4096 256 30075 53609 752255 392603 4096 512 31948 49355 1706755 549056 8192 4 5016 5708 273349 364722 8192 8 2356 8863 494863 319364 8192 16 10901 15467 246903 249642 8192 32 18893 20504 621886 477140 8192 64 28381 28353 359566 683289 8192 128 32250 36861 640755 600056 8192 256 26363 34291 567790 419887 8192 512 46388 45672 878320 957234 16384 4 5886 6299 323226 422561 16384 8 9390 10547 378680 288338 16384 16 16886 22755 916225 515966 16384 32 19843 30372 611047 731526 16384 64 21615 33570 667699 661821 16384 128 27071 44790 821248 646462 16384 256 32653 46886 665829 624530 16384 512 30516 35969 580642 614918 32768 4 5292 4959 231911 276352 32768 8 9281 10155 354662 236445 32768 16 12529 17094 481611 348292 32768 32 20534 26140 491134 424753 32768 64