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 6 12:04:20 2026 Auto Mode Machine = Linux oleg401-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-oleg401-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 1997 4922 679917 441646 64 8 910 3282 929467 913649 64 16 4933 16223 1013707 939223 64 32 1098 7687 1101022 1163036 64 64 1749 25127 603489 1679761 128 4 1564 3438 656477 428193 128 8 1934 17071 179567 170879 128 16 2609 13785 1040839 656477 128 32 4803 67160 1363288 1175271 128 64 12376 13529 1217930 1363288 128 128 3734 85957 1603529 1878447 256 4 1248 2223 71053 428843 256 8 2215 3856 612235 338207 256 16 1704 4818 84741 454627 256 32 6047 18507 807442 1031644 256 64 5605 18816 867455 1158540 256 128 8157 21146 1422540 354042 256 256 7038 41524 461267 1639786 512 4 3078 3191 180919 378157 512 8 3058 5381 836310 517739 512 16 22812 33331 1199171 732478 512 32 29755 32280 964378 831132 512 64 30098 67939 1506154 429170 512 128 6893 32938 1091308 675563 512 256 36839 84430 547017 1394645 512 512 37352 124695 1701913 1992458 1024 4 9308 8578 452492 577295 1024 8 13738 13834 482103 335392 1024 16 19987 23039 619424 485537 1024 32 25490 33160 835953 1109579 1024 64 11680 35197 608800 269686 1024 128 27964 83009 1239598 1174513 1024 256 49387 103423 1657133 1406431 1024 512 51212 99758 1316341 901394 2048 4 8095 7995 265762 199999 2048 8 15402 14687 264160 274976 2048 16 5102 9271 300738 1084066 2048 32 23751 35122 761329 260294 2048 64 16191 28096 1226291 636772 2048 128 19850 28929 156776 280242 2048 256 11925 34558 978485 473201 2048 512 24093 31908 588520 549375 4096 4 3430 3493 506559 418849 4096 8 11262 4869 227593 533954 4096 16 4408 5972 193188 128655 4096 32 6259 13539 398634 136797 4096 64 12301 13145 193015 135778 4096 128 9387 15619 1590021 218546 4096 256 32587 47297 909622 811067 4096 512 32532 36505 372198 891774 8192 4 4867 2866 421267 162529 8192 8 4879 4141 255457 285048 8192 16 8629 8136 244823 183863 8192 32 11837 21347 410295 586986 8192 64 15062 19024 244084 368327 8192 128 18482 30838 333402 181817 8192 256 18568 21338 177777 218913 8192 512 18661 26777 828828 459866 16384 4 3205 4346 190589 185671 16384 8 5459 6802 274177 236203 16384 16