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 Aug 25 21:33:45 2026 Auto Mode Machine = Linux oleg621-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-oleg621-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 3494 3918 627470 500060 64 8 2176 5459 799377 1279447 64 16 2043 23686 955947 760859 64 32 3558 53422 1101022 1163036 64 64 7659 61233 1336792 1933893 128 4 4547 7839 650117 131527 128 8 4986 12077 908709 859260 128 16 8039 21574 1085013 921183 128 32 13962 65537 395104 272965 128 64 7117 47549 1266785 1206978 128 128 9389 45036 1303699 1885042 256 4 6614 6080 473263 571502 256 8 9305 25551 901693 407676 256 16 11789 33342 1058076 907792 256 32 16227 33706 966633 92789 256 64 19108 32803 1163562 1093639 256 128 12863 92589 500857 636553 256 256 15491 98006 559005 1683493 512 4 9141 8136 555220 398730 512 8 14316 19708 647260 707152 512 16 6807 24339 725303 449470 512 32 11688 24093 1201856 924123 512 64 35474 75942 1347393 670082 512 128 23904 94499 1411141 575300 512 256 18707 110394 840895 1350783 512 512 19998 50236 406043 872320 1024 4 7395 15405 463328 175794 1024 8 8214 17085 169448 378417 1024 16 23542 35513 510952 946276 1024 32 30239 44196 1133893 1067654 1024 64 36317 73818 396258 290734 1024 128 24464 44894 1471481 370613 1024 256 52308 93815 533880 181622 1024 512 40050 63461 458188 1684429 2048 4 10156 12320 277391 256065 2048 8 10376 11492 212955 627286 2048 16 14866 16805 169353 577715 2048 32 30408 39592 1317109 611174 2048 64 18907 24450 206534 881217 2048 128 21582 34241 823436 776399 2048 256 28779 28945 1387530 1115459 2048 512 37708 42978 225998 609526 4096 4 5789 13058 305372 255201 4096 8 9668 9935 415205 282504 4096 16 12853 20501 558880 555914 4096 32 23859 33654 810608 882747 4096 64 29692 34821 504877 451308 4096 128 47651 39019 1218706 898819 4096 256 36444 61195 925449 1052700 4096 512 36537 71574 623253 805817 8192 4 8420 8801 254481 301687 8192 8 11198 16720 495884 400706 8192 16 22323 20740 577350 443598 8192 32 23409 42419 853789 655422 8192 64 29421 47302 592676 326635 8192 128 32471 38859 500916 724570 8192 256 40936 48115 549168 248052 8192 512 38930 59081 1197503 628898 16384 4 7483 8293 250374 297961 16384 8 14441 16220 455972 438307 16384 16 20561 26377 647790 541781 16384 32 27556 35538 426091 497466 16384 64 30853 42921 833197 588760 16384 128 27419 50355 747139 528412 16384 256 39195 44337 630472 450183 16384 512 30889 58920 1097232 442236 32768 4 6744 8522 300367 384033 32768 8 17535 19599 353148 384903 32768 16 24971 27342 641378 492351 32768 32 29087 33519 936444 653348 32768 64 41444 29793 649719 578009 32768 128 25648 36590 787048 376981 32768 256 31999 44576 548372 778930 32768 512 38904 84474 1017705 671669 65536 4