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 Oct 24 01:48:00 2025 Auto Mode Machine = Linux oleg417-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-oleg417-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 3526 6051 251861 290890 64 8 9454 30404 369844 315136 64 16 12383 46076 473593 512471 64 32 9329 56491 82372 842003 64 64 13024 70477 1163036 1392258 128 4 11615 9636 62530 168625 128 8 6590 9120 476031 370050 128 16 16163 49327 561694 549618 128 32 21080 56734 841746 431288 128 64 23374 101838 1105114 753179 128 128 14692 99460 1278855 1391557 256 4 3804 13172 255482 37204 256 8 8587 5914 467086 282206 256 16 26119 49202 679237 319204 256 32 16612 85503 882426 289277 256 64 42210 113278 921029 805021 256 128 43894 113529 1201314 203175 256 256 30846 101913 1479379 1897721 512 4 10799 15943 240377 169482 512 8 24588 26081 418628 146537 512 16 25356 11039 579179 77284 512 32 37168 27141 808904 288764 512 64 25518 22476 957072 915847 512 128 50122 123285 1122687 988801 512 256 38688 126294 1333173 1207261 512 512 59840 146079 1652157 1251589 1024 4 8790 13802 186690 154263 1024 8 24591 32717 431143 161284 1024 16 32860 44880 602649 337606 1024 32 40709 57928 997251 720655 1024 64 48535 51544 1036478 917570 1024 128 66445 115484 1351126 1032244 1024 256 41313 97220 1107005 772225 1024 512 43358 50515 732578 1681132 2048 4 8671 7931 150323 111014 2048 8 20308 15157 245008 326280 2048 16 23918 22876 233493 246449 2048 32 24555 40271 877436 709630 2048 64 22312 74785 1081337 1098624 2048 128 38442 90941 784053 1091644 2048 256 47626 41314 1350872 1204623 2048 512 37465 132918 1359854 1083109 4096 4 8648 7235 140087 141838 4096 8 12800 14031 270277 166801 4096 16 24797 33025 523524 433760 4096 32 35835 43677 451154 187416 4096 64 28898 55885 923559 849445 4096 128 57628 59505 928400 1067549 4096 256 50811 53486 1407516 1258339 4096 512 45700 45304 433257 700652 8192 4 9466 10355 172656 173596 8192 8 19520 17638 343983 220605 8192 16 21307 28379 628702 538344 8192 32 30229 42236 703346 694110 8192 64 35969 64790 687128 880188 8192 128 34173 57458 1248954 909425 8192 256 41959 54179 1162301 316146 8192 512 36315 67078 837719 714892 16384 4 8494 11223 195655 179759 16384 8 15068 17863 437888 152783 16384 16 25896 26195 418429 245954 16384 32 29164 36023 467019 357261 16384 64 37796 38982 862218 771627 16384 128 45711 54418 356988 683892 16384 256 54700 46169 631857 1086460 16384 512 50268 66435 334339 801488 32768 4 9354 10155 123649 137919 32768 8 15802 21192 424923 375310 32768 16 31224 43413 596314 549071 32768 32 38774 41547 613129 460495 32768 64 51109 84067 1064685 559552 32768 128 64395 82580 1347311 760630 32768 256 45194 75430 1009268 857012 32768 512 66690 84141 1473579 1290484 65536 4 11664 11271 164131 164564 65536 8