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 Oct 23 13:01:05 2025 Auto Mode Machine = Linux oleg229-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-oleg229-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 7085 20963 866463 703068 64 8 11124 40246 809014 679917 64 16 13913 54517 1188789 855419 64 32 10102 58345 1105556 1049372 64 64 17500 94826 1304314 1492919 128 4 8250 22160 633247 558771 128 8 17940 39153 766076 853794 128 16 5432 40855 1217930 726674 128 32 11598 87384 1111981 1111981 128 64 20234 109592 1391557 908709 128 128 21883 124859 1162547 1939522 256 4 10099 11590 64435 528987 256 8 10887 25595 931416 879535 256 16 14740 63165 973645 876662 256 32 33276 64501 1158540 1016025 256 64 12397 94529 1235882 136023 256 128 36425 143821 1534342 61213 256 256 29068 156755 1629830 2077650 512 4 5790 15701 308599 540545 512 8 26442 34056 501536 784094 512 16 40534 52887 1125040 1100818 512 32 25898 90765 1320061 966113 512 64 53985 111252 105824 1316016 512 128 42802 160202 1684557 1411141 512 256 29443 76830 1747618 1695195 512 512 34196 167369 1662389 2032051 1024 4 8573 6193 606564 605965 1024 8 27546 33686 1041505 712644 1024 16 20835 38405 1054547 484605 1024 32 64617 47694 1361836 1219189 1024 64 65958 100757 1506051 1261072 1024 128 60299 102442 1551758 1170352 1024 256 50648 156763 1442326 1554004 1024 512 77247 170382 1738286 1617808 2048 4 8820 16143 477064 556061 2048 8 22091 13676 805371 836915 2048 16 17546 66332 1078486 930975 2048 32 18567 106516 1084203 996072 2048 64 38639 55849 1402711 1295263 2048 128 52165 74178 895082 1024097 2048 256 59576 80446 1650385 1221930 2048 512 45598 181399 1723915 1574169 4096 4 10586 13234 372666 406789 4096 8 16687 19860 977305 824615 4096 16 31720 39243 653903 862668 4096 32 39321 46459 1298180 979925 4096 64 40068 60114 1458169 655349 4096 128 67291 94410 1592526 1414818 4096 256 49750 56165 1382373 853327 4096 512 60826 92753 1781625 1455081 8192 4 12861 13276 324127 394301 8192 8 20933 25185 640301 807575 8192 16 35428 47313 927743 628415 8192 32 36293 49539 937949 1091415 8192 64 35383 53337 607128 962867 8192 128 53499 95847 284482 1377485 8192 256 69766 66625 1655348 964570 8192 512 2954 74878 357508 569560 16384 4 10991 12490 620818 543831 16384 8 18526 20077 272042 662089 16384 16 25925 31929 888367 872464 16384 32 32673 35161 824520 610135 16384 64 31755 71051 1334311 1188449 16384 128 40575 61948 748914 764860 16384 256 44556 97223 1070917 1310719 16384 512 39650 96298 1666378 1521695 32768 4 8868 9886 330302 408654 32768 8 18823 18022 947326 620769 32768 16 26579 33125 373161 379465 32768 32 20726 50862 746627 304540 32768 64 45973 61437 575827 491127 32768 128 52531 67957 1183606 557469 32768 256 43927 73759 1560391 1061593 32768 512 56284 103525 1305500 612623 65536 4 8969 10266 535508 310927 65536 8