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 14:27:33 2026 Auto Mode Machine = Linux oleg304-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-oleg304-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 1444 4172 703068 598110 64 8 1419 10179 939223 733819 64 16 1774 16335 244297 889431 64 32 4556 44785 1124074 681644 64 64 2767 44569 620221 1828508 128 4 3548 2897 520321 463696 128 8 5045 19104 564055 847059 128 16 4072 21943 1111981 1067750 128 32 6860 45310 1162547 1111981 128 64 8719 85450 1359835 1291158 128 128 7929 56561 1332828 2132084 256 4 5270 8140 606700 233584 256 8 6145 11159 844929 362651 256 16 4386 10101 924200 136023 256 32 11631 32096 1202660 233991 256 64 14548 45845 1306564 537729 256 128 19214 65640 1514860 941213 256 256 9234 30397 576411 1842366 512 4 5430 13136 269317 395353 512 8 5473 7123 161358 616242 512 16 5197 5884 1174254 389615 512 32 16055 32651 662434 1082507 512 64 26159 56293 840566 1077618 512 128 11275 28612 441432 939486 512 256 13290 36158 1333173 949875 512 512 15595 16493 988345 1023680 1024 4 3080 6115 629778 562624 1024 8 15606 21322 907105 528104 1024 16 13365 14013 619156 967813 1024 32 26823 25718 1343938 1141730 1024 64 20057 35042 567906 1304745 1024 128 14382 27056 404582 1116792 1024 256 26871 30077 1654579 671004 1024 512 29566 89050 1689730 1654579 2048 4 5788 9571 619683 241000 2048 8 14971 12102 920796 458672 2048 16 9083 16550 141300 270968 2048 32 16121 30096 278561 203780 2048 64 12939 51789 409848 656632 2048 128 24196 35002 967901 723192 2048 256 32416 51032 202914 554876 2048 512 20204 34443 809164 878154 4096 4 5097 5932 396902 217883 4096 8 10652 11597 335985 393430 4096 16 13701 23207 459701 495285 4096 32 16899 28080 244871 365849 4096 64 23946 26285 1029980 525526 4096 128 35246 40645 1223480 944425 4096 256 39939 38422 761221 656727 4096 512 42161 58535 1823802 806763 8192 4 4757 2215 216073 239666 8192 8 7810 8811 217571 361055 8192 16 13617 21880 525468 180127 8192 32 30523 21903 539163 410521 8192 64 27728 28959 970866 711988 8192 128 27916 43608 596514 302969 8192 256 24194 42360 854851 713452 8192 512 40736 42393 1022738 860783 16384 4 7439 9602 642533 451063 16384 8 9986 7638 380022 441486 16384 16 17428 16012 278564 375943 16384 32 12940 19714 331077 303806 16384 64 18643 25146 883524 953618 16384 128 21968 27006 649800 535424 16384 256 18510 22618 464255 269314 16384 512 51943 27757 304371 634155 32768 4 8354 6439 263792 291146 32768 8 8642 9872 288504 258198 32768 16 15154 17734 667099 462146 32768 32 21088 31823 422834 589171 32768 64