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: Sun Nov 16 18:45:59 2025 Auto Mode Machine = Linux oleg122-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-oleg122-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 1814 14240 213415 243411 64 8 4435 26403 390278 273409 64 16 1871 36868 647135 456673 64 32 4718 51823 752329 456673 64 64 2523 60775 488236 1168097 128 4 2748 10268 331441 171097 128 8 4898 12598 358677 292922 128 16 5787 42481 262296 475609 128 32 4184 59560 841746 702889 128 64 4343 32997 776042 901083 128 128 4151 70642 1306873 1266785 256 4 3554 7020 129353 82185 256 8 6967 13511 358534 325296 256 16 9465 22332 534517 592636 256 32 11215 27356 107472 149176 256 64 5504 46200 1103757 1036624 256 128 14961 70814 495312 958864 256 256 11123 81013 561343 1814348 512 4 7645 15244 295072 246389 512 8 11026 16406 457124 344324 512 16 16947 28569 545350 567545 512 32 11197 53377 635198 651383 512 64 17304 69955 1019791 801059 512 128 25776 87882 1077618 1055894 512 256 18652 92100 1492545 260401 512 512 32015 96786 1399189 234753 1024 4 5647 16442 149313 238148 1024 8 16720 23368 337156 175880 1024 16 15503 16309 666733 221506 1024 32 32585 70987 900637 878351 1024 64 24402 42349 1077836 973296 1024 128 30782 62933 385828 261492 1024 256 28407 70953 1424624 719087 1024 512 34668 102709 1635675 1306332 2048 4 8029 12937 211549 211700 2048 8 18951 19053 255236 482775 2048 16 12142 22098 328250 547869 2048 32 33540 50645 433707 602852 2048 64 38169 49054 957970 680670 2048 128 45811 63490 996534 1015862 2048 256 38364 67275 1295458 989874 2048 512 28309 53733 1584038 1185831 4096 4 7678 9610 84833 272541 4096 8 9928 17196 211024 289404 4096 16 31577 38656 341617 444489 4096 32 34757 27914 743916 539809 4096 64 25384 57812 952067 568647 4096 128 43162 29208 416473 831157 4096 256 52112 86897 584890 871110 4096 512 41180 53696 764473 575428 8192 4 8455 7889 118316 178021 8192 8 11470 15832 259899 360105 8192 16 28259 37152 361552 443965 8192 32 23648 36866 837801 484535 8192 64 32553 45424 1021310 967748 8192 128 43760 44784 1026190 919427 8192 256 60114 32625 380882 528279 8192 512 39545 70383 713408 658310 16384 4 10098 9593 184756 117904 16384 8 12252 18802 383762 205782 16384 16 22777 32992 328719 397707 16384 32 33619 37900 440702 299080 16384 64 40111 42170 712194 871346 16384 128 39908 67139 1161080 864952 16384 256 47737 55574 1065768 1307676 16384 512 47003 54117 1559934 694060 32768 4 9944 11753 238887 124754 32768 8 16820 20180 304792 288197 32768 16 23273 21864 415105 291230 32768 32 27116 23952 381378 332295 32768 64 29430 48085 700994 412233 32768 128 46017 58981 616404 756819 32768 256 42072 60719 960407 622400 32768 512 42906 65662 1517106 903550 65536 4 10216 12612 180249 200147 65536 8