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 2 18:00:30 2026 Auto Mode Machine = Linux oleg251-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-oleg251-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 7500 15429 470274 397208 64 8 10409 33630 1392258 901377 64 16 11887 42752 831569 1183548 64 32 16275 73810 1526887 1033216 64 64 10419 76112 1163036 1991276 128 4 12389 19224 603357 554157 128 8 14238 32828 859260 853794 128 16 18835 44275 1142750 927549 128 32 19096 73314 1349580 1133103 128 64 26500 94606 2175277 1294270 128 128 24724 123680 1852520 1911894 256 4 15103 19279 853662 1093639 256 8 17735 27965 955451 710708 256 16 22652 46109 1354356 1267990 256 32 36596 69283 1924938 1398455 256 64 38864 90973 1911233 1195962 256 128 36051 118582 1107172 1122215 256 256 52707 144382 1924938 3465855 512 4 14050 16755 658978 725303 512 8 27984 33470 927315 939486 512 16 28256 52495 862164 1000315 512 32 43022 78227 1064794 1339827 512 64 51436 81934 1902438 1040545 512 128 57161 109421 1227971 1276891 512 256 61259 136064 1527582 1357615 512 512 59306 140811 1527582 1875849 1024 4 17138 19266 903860 856799 1024 8 26019 33751 1286378 1042770 1024 16 36962 47345 804330 985580 1024 32 45812 80125 2306882 1735476 1024 64 72949 124193 1947119 1499217 1024 128 80295 100057 1544504 1387798 1024 256 81717 153201 1697745 1910737 1024 512 84149 125705 2098375 1594978 2048 4 16772 20745 929263 842827 2048 8 30633 35016 1258081 1343897 2048 16 49913 63151 1462911 1516101 2048 32 67321 95861 1408461 1449336 2048 64 84912 133872 1387530 1625402 2048 128 78075 144714 1823840 1334295 2048 256 76609 151750 1851755 1356418 2048 512 94797 161274 2074960 1906837 4096 4 16091 18249 853157 763454 4096 8 28172 30740 1335104 1079896 4096 16 50020 58903 1910613 1467636 4096 32 75530 94735 2185788 1481942 4096 64 84479 116280 1780886 1698823 4096 128 97868 127616 1725959 1487330 4096 256 94674 122367 1508090 1251829 4096 512 93970 134202 2381526 1230843 8192 4 17383 17791 901290 837882 8192 8 28123 33028 1142399 1033816 8192 16 39257 54553 1250135 1277227 8192 32 65863 81814 1512258 1125596 8192 64 77641 110331 1923858 1715173 8192 128 85357 114384 1732994 1533793 8192 256 91126 136654 1709456 1787539 8192 512 95087 135445 2374581 2043421 16384 4 17302 18760 824935 690115 16384 8 28822 31790 898390 846676 16384 16 40929 50058 1253757 1252889 16384 32 63456 86973 1445818 1207812 16384 64 78136 103110 1974481 1560855 16384 128 82366 118940 1829991 1556824 16384 256 101511 117223 1847357 1919602 16384 512 101172 137207 1809178 1509760 32768 4 17143 17604 756310 705065 32768 8 26607 31770 1051634 1031926 32768 16 42645 51228 1173640 1300780 32768 32 59390 74573 1551145 1285920 32768 64 81998 112064 1916813 1464565 32768 128 94181 120755 1928567 1401297 32768 256 95991 137168 2052620 1751086 32768 512 102639 145442 2022713 1741236 65536 4