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 30 19:57:39 2026 Auto Mode Machine = Linux oleg231-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-oleg231-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 9241 15005 929467 659861 64 8 13654 34628 1226821 679917 64 16 17035 65844 942521 842003 64 32 19728 75641 1330167 1460430 64 64 23485 95535 1279447 2662899 128 4 14731 20443 649331 985435 128 8 10471 38027 940549 1007629 128 16 21136 52393 940549 1000121 128 32 29385 90721 1373754 895074 128 64 26678 103069 1391557 2286447 128 128 19876 186880 2132084 2727923 256 4 16428 20296 575484 731528 256 8 25258 31238 951219 826078 256 16 29220 52243 1487577 861885 256 32 46510 73970 817898 1122215 256 64 53601 101624 1437779 1280084 256 128 27941 120013 2135500 2000242 256 256 29087 164411 1911233 2413957 512 4 15305 19821 585814 648041 512 8 26142 37640 808904 1248678 512 16 41108 49468 1001715 791318 512 32 66254 103329 1968713 1323315 512 64 63224 115055 1286067 1169140 512 128 71868 170831 1527582 1640796 512 256 57315 175450 2124526 1778004 512 512 70895 211204 1783912 2560168 1024 4 16812 18326 643652 867879 1024 8 32539 41835 1300793 878890 1024 16 51454 54514 1208894 998178 1024 32 61512 96614 1220575 980853 1024 64 98139 109529 2169388 1888889 1024 128 95495 141650 1885572 1925298 1024 256 108483 222943 2723840 2008114 1024 512 85825 207960 1799462 1720874 2048 4 17742 19003 646452 603573 2048 8 29644 36232 1371798 892015 2048 16 53923 71017 1853353 1408461 2048 32 75658 119886 1851755 1659632 2048 64 68246 153488 1631886 1615315 2048 128 111753 156346 1658350 1414491 2048 256 126146 208428 2188069 1982533 2048 512 124779 196566 2415069 2120549 4096 4 17375 23479 762201 630458 4096 8 35037 38223 1339894 1244214 4096 16 49837 55089 1109466 912861 4096 32 68255 82605 1461270 1544423 4096 64 77248 111906 1422197 1140321 4096 128 100114 159383 1980661 1773899 4096 256 90814 148966 1754873 1410520 4096 512 93334 137583 1943027 1454465 8192 4 19115 21285 927843 779754 8192 8 34926 38866 1005793 1216885 8192 16 57441 66941 1457415 1220516 8192 32 75470 91909 1495670 1625434 8192 64 91788 128689 1941688 1823203 8192 128 106504 139788 2122831 1640411 8192 256 116540 158287 1910062 1559834 8192 512 112779 175398 2192175 2008776 16384 4 18584 21351 1002884 693234 16384 8 33355 33711 1219407 1118284 16384 16 59600 64331 1761324 1618307 16384 32 75741 90948 1873496 1617659 16384 64 98609 135517 2198614 1496934 16384 128 113534 174945 2213486 1873956 16384 256 131252 190766 2337571 1795892 16384 512 120909 177435 2395675 2247144 32768 4 19255 19874 788810 805168 32768 8 33158 37169 1317098 1010173 32768 16 52663 58878 1555041 1398417 32768 32 74903 91662 1552775 1479432 32768 64 104987 122875 1329816 1602584 32768 128 106950 153390 1835755 1660315 32768 256 118612 154161 2076280 1875229 32768 512 122750 166050 2073679 1747257 65536 4 17913 19551 857488 724369 65536 8