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: Mon Mar 16 09:41:50 2026 Auto Mode Machine = Linux oleg421-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-oleg421-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 7854 18253 647135 763021 64 8 12312 35284 901377 877797 64 16 15806 42354 1143223 673098 64 32 20005 81103 1879725 1232453 64 64 16108 81225 1285575 1828508 128 4 13232 8414 466923 601330 128 8 10430 32611 811221 927549 128 16 13000 52656 1111981 1209698 128 32 34982 80300 1306873 1114289 128 64 28439 68488 1254941 1406136 128 128 25251 165608 1561553 2326073 256 4 13042 19214 679237 542347 256 8 18077 34024 891956 913973 256 16 30399 62591 2097948 1312954 256 32 30302 77977 1262029 1173737 256 64 18278 51697 1422540 1237306 256 128 13203 93565 1598292 1007446 256 256 43177 145457 2665657 2285501 512 4 16101 19056 978885 593915 512 8 22436 37730 1152822 1130370 512 16 39710 59465 1135150 1180062 512 32 53216 90988 1718254 1339827 512 64 60975 136090 1354190 2099600 512 128 67033 158816 1546280 1395552 512 256 82222 210706 2081286 1815584 512 512 79182 157246 1551867 2009236 1024 4 18499 20255 655539 600963 1024 8 27218 35717 1174192 673212 1024 16 38720 64027 1198772 1019987 1024 32 60026 98603 1317957 1144163 1024 64 92086 136770 1771993 1454537 1024 128 79342 175521 1568189 1689730 1024 256 99883 218286 2842832 1822368 1024 512 86795 211264 2559871 1932227 2048 4 20567 22045 822175 893592 2048 8 32625 33351 896671 975263 2048 16 43534 59303 1160362 1053487 2048 32 59678 92510 1729816 1354493 2048 64 73376 134163 1818820 1650385 2048 128 95052 133082 2064488 1288849 2048 256 81412 177809 1612586 1404546 2048 512 97523 174164 1884251 1776319 4096 4 17979 19879 770784 555554 4096 8 32030 35350 1014111 638305 4096 16 49996 60567 1354045 1176719 4096 32 64840 88012 1812259 1440321 4096 64 88591 133546 1785699 1555048 4096 128 82220 123844 1944786 1490556 4096 256 101208 162140 1579641 1350002 4096 512 109718 145454 2063448 1681365 8192 4 17465 18995 805756 722772 8192 8 32171 36089 966034 1027356 8192 16 47975 59123 1194880 1203796 8192 32 65004 79306 1566591 1331627 8192 64 81071 99311 1608466 1418311 8192 128 62406 106084 832704 1346658 8192 256 93085 133381 1953278 1691530 8192 512 104225 179731 2079282 1539566 16384 4 17872 19715 729895 678705 16384 8 28981 33814 1069866 996832 16384 16 46374 56639 1413521 1124193 16384 32 66401 89066 1761188 1466647 16384 64 84130 123028 1585597 1542739 16384 128 101474 123577 2000461 1485158 16384 256 105848 139564 1727192 1363649 16384 512 106331 160178 1966627 1754175 32768 4 16941 19550 804834 687463 32768 8 29974 32810 1062167 990088 32768 16 42749 56269 1574098 1131065 32768 32 68948 85292 1371785 1374900 32768 64 83403 88037 1746325 12972 32768 128 75528 65884 1084067 892589 32768 256 46872 72582 952308 750025 32768 512 61185 52307 762470 1351085 65536 4 6561 6652 218543 199544 65536 8 9922 9301 479355 309668 65536 16 14949 22076 803767 780134 65536 32 36393 43535 1169216 751059 65536 64 45224 75152 1706089 1420933 65536 128 72655 87543 1676148 1384072 65536 256