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: Fri Apr 10 14:51:36 2026 Auto Mode Machine = Linux oleg124-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-oleg124-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 9440 12181 1163036 659861 64 8 7733 27178 1492919 863676 64 16 9558 56479 1163036 942521 64 32 11013 69564 238015 1232453 64 64 10101 81745 2561267 2662899 128 4 8829 20433 795593 300464 128 8 12826 15451 162648 1332828 128 16 7438 47905 1038825 948860 128 32 14754 22914 1123617 1778862 128 64 7786 92027 1778862 1827299 128 128 8294 146774 1852520 1727352 256 4 9240 16306 805021 50653 256 8 7763 29618 1405778 699139 256 16 21096 23006 1066483 1084800 256 32 32100 71569 596587 1138879 256 64 28479 105260 1514860 514045 256 128 35889 42996 1495866 2030503 256 256 25897 104360 1763685 2030503 512 4 14536 17556 671969 533827 512 8 13914 32825 840895 133236 512 16 31463 60164 599553 869494 512 32 31982 98863 1657257 1480200 512 64 70659 116896 1560891 767559 512 128 47102 131789 2521095 966113 512 256 21193 59507 1610042 1064266 512 512 59019 114539 1829505 2275345 1024 4 14909 18890 457992 552350 1024 8 23849 27229 940269 325825 1024 16 40098 46284 1253344 1352828 1024 32 44653 81607 1430318 877454 1024 64 32949 63499 1492445 424370 1024 128 52239 97272 571458 580494 1024 256 57306 83735 1335165 527002 1024 512 36194 152288 1354535 2410457 2048 4 11864 10997 609699 293654 2048 8 17266 20633 1028512 444733 2048 16 22790 24315 725206 261260 2048 32 23838 54343 566513 567599 2048 64 37946 49940 1677457 1431225 2048 128 34517 57235 499391 1178348 2048 256 33131 85801 1080113 675213 2048 512 49906 70613 1108263 1788524 4096 4 8906 10379 574389 458939 4096 8 19188 17777 277484 755564 4096 16 28168 22294 678461 1424201 4096 32 27622 33463 913443 661940 4096 64 33648 48517 576741 838459 4096 128 50893 76515 526411 716849 4096 256 52506 75237 1758645 1164989 4096 512 70591 97251 1431201 1445288 8192 4 12535 10822 626833 271466 8192 8 22735 20901 581276 659738 8192 16 27980 30165 574272 1241597 8192 32 49032 58406 798658 1169103 8192 64 55020 93042 463507 855021 8192 128 44978 75304 1142703 1191730 8192 256 71721 98300 1292749 963326 8192 512 68607 80405 1545938 1003561 16384 4 13279 11836 875264 660695 16384 8 17496 5221 583516 706970 16384 16 37614 40636 953843 1119742 16384 32 40488 54043 591095 1162573 16384 64 47234 92786 1621859 1234567 16384 128 67526 101603 1147738 797045 16384 256 60380 70530 1278911 884286 16384 512 83132 142333 1543744 1093287 32768 4 13564 12274 558845 562435 32768 8 20600 20982 642271 598719 32768 16 28991 36398 965582 819343 32768 32 40932 51663 927483 635853 32768 64 42788 71011 1534725 1444478 32768 128 52535 70839 873000 1101293 32768 256 69166 92810 1232804 974227 32768 512 81359 113222 1517324 1346097 65536 4 11590 12172 461508 512845 65536 8 18791 23056 966111 866683 65536 16 31673 35253 1233267 1264906 65536 32 47567 57324 1023907 820205 65536 64 60249 58852 675384 850354 65536 128 55661 74970 1375966 1059011 65536 256