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: Tue Apr 28 20:48:07 2026 Auto Mode Machine = Linux oleg128-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-oleg128-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 11114 22308 913649 901377 64 8 15215 40300 1638743 913649 64 16 15602 61121 1143223 818885 64 32 18059 82702 2358717 1947927 64 64 17922 128758 2278628 1933893 128 4 13870 18823 934004 805138 128 8 20638 29459 1093856 1303699 128 16 24786 58344 2098744 1281909 128 32 26924 83173 1391557 1142750 128 64 31816 114598 2248149 2558895 128 128 31418 126239 1749872 3445772 256 4 16127 25139 861885 850282 256 8 19863 39053 815414 1413179 256 16 30963 65995 1558845 955451 256 32 31272 66268 1407621 1839210 256 64 38951 90399 1439707 1375171 256 128 55980 159692 2754556 2719671 256 256 49135 154588 2754556 2131261 512 4 16110 19218 1105920 656561 512 8 30488 37479 1533034 880908 512 16 48484 65632 1233614 1145443 512 32 48887 93962 1753325 1204552 512 64 62438 111160 1570020 1426135 512 128 71697 122953 1701913 1467055 512 256 73787 169697 1753325 2509312 512 512 82755 174623 2256220 2830083 1024 4 21215 21114 1140214 967813 1024 8 26386 29165 1272279 1155864 1024 16 53846 68198 1837965 1563053 1024 32 63366 89738 1917562 1404591 1024 64 65235 113979 1793451 1280243 1024 128 79595 180091 1532928 2202766 1024 256 74165 122284 2197132 2039583 1024 512 72872 181109 1695065 1878973 2048 4 18607 21097 779641 1121576 2048 8 28658 40722 1181753 1052326 2048 16 49521 60733 1367213 1155212 2048 32 66342 107259 2199836 1194738 2048 64 81228 125930 1732608 1877250 2048 128 85408 160260 2278010 1689666 2048 256 87181 213622 2267786 2094183 2048 512 106043 193685 2452301 1644697 4096 4 18229 19103 811718 630550 4096 8 30945 35458 1102559 1180113 4096 16 48422 62122 1474944 1648928 4096 32 73159 86627 1787929 1535726 4096 64 98074 111379 1998169 1639800 4096 128 103280 114743 1852515 1899838 4096 256 111392 146035 1870466 1985468 4096 512 107962 152154 1809206 1782549 8192 4 19322 21933 1004911 836251 8192 8 36142 43150 1559197 1323880 8192 16 56564 64958 1964108 1065953 8192 32 76360 88725 2446785 1790987 8192 64 96146 125815 2264262 1539911 8192 128 100923 127625 1828150 1902447 8192 256 100218 190937 2251797 1543646 8192 512 128154 149973 2435167 1933928 16384 4 19384 20060 1046041 840596 16384 8 32875 35393 1523416 1212565 16384 16 51282 62742 1937298 1483683 16384 32 80765 92212 1414132 1594833 16384 64 101910 123179 2008824 1723164 16384 128 120470 147066 2121442 1773323 16384 256 112390 154595 2313802 1984001 16384 512 122487 162468 2749020 1886508 32768 4 20256 21090 919700 832117 32768 8 32859 39304 1363349 1047610 32768 16 51371 57134 1594312 1535599 32768 32 70710 83738 2239484 1933559 32768 64 87513 115901 1720722 1769346 32768 128 102660 146239 2256767 1923008 32768 256 112331 155920 2286540 2035776 32768 512 117274 128218 1880643 1695462 65536 4 18698 19434 857734 865708 65536 8 29164 30260 1065245 973123 65536 16 42790 51425 1474209 1374872 65536 32