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: Mon Aug 24 16:15:22 2026 Auto Mode Machine = Linux oleg433-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-oleg433-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 3293 11663 507625 426897 64 8 3420 3706 257169 232048 64 16 2536 23038 863676 633392 64 32 3315 38120 1232453 1017549 64 64 5359 65379 1232453 1553394 128 4 2660 5277 85627 483316 128 8 3528 9981 780556 499970 128 16 5323 20595 983630 795593 128 32 6942 14702 1067750 852438 128 64 7719 40793 1048974 1306873 128 128 9907 33056 406472 1642783 256 4 8453 2923 203175 189613 256 8 8352 20824 659625 519266 256 16 17449 30809 921029 723153 256 32 19068 55895 991629 944525 256 64 10952 20848 693718 554101 256 128 19748 53211 1178892 1391207 256 256 19749 100351 570288 584570 512 4 9728 3789 151746 505432 512 8 6036 14553 540681 246984 512 16 7693 35832 710192 143492 512 32 16057 58816 663252 606667 512 64 15740 25786 351423 1038532 512 128 14648 124724 1365383 1168504 512 256 28674 89041 932550 914287 512 512 25482 49282 1276891 992456 1024 4 4115 8024 320118 102871 1024 8 22596 18861 340308 253842 1024 16 10422 46114 1079190 321291 1024 32 26965 49585 1374474 980853 1024 64 19201 32421 1471481 547282 1024 128 23303 34573 116921 229030 1024 256 18461 58314 335078 964120 1024 512 31102 50127 509679 820463 2048 4 4937 7927 576087 426939 2048 8 11273 8186 437329 186147 2048 16 15485 12123 306730 620041 2048 32 21803 27028 394761 643787 2048 64 19710 33915 1112425 228517 2048 128 20002 54453 315217 425353 2048 256 35925 116728 1393156 850841 2048 512 33526 61481 1522820 423926 4096 4 4097 5750 493322 198719 4096 8 10036 16837 513156 577148 4096 16 25540 30023 1005681 171522 4096 32 30908 23764 555770 261741 4096 64 20358 12902 277377 425151 4096 128 22577 21031 353198 233378 4096 256 14426 25441 413695 211133 4096 512 17565 28592 550252 374437 8192 4 3972 10805 223082 327011 8192 8 5658 18029 361758 172386 8192 16 32289 34048 438777 313942 8192 32 12501 34402 468117 549028 8192 64 28455 27161 509034 361628 8192 128 24401 74659 433463 560172 8192 256 19469 33456 306496 233910 8192 512 52765 65389 702397 1119873 16384 4 9403 9041 184502 198369 16384 8 7674 15833 344498 208098 16384 16 21203 25550 879814 644177 16384 32 30547 44636 488707 646413 16384 64 23699 32222 583452 1131728 16384 128 40513 40752 262740 189497 16384 256 32788 91804 837625 752143 16384 512 62131 52915 802583 1006689 32768 4 7648 4500 237025 364867 32768 8 10099 8044 202944 404453 32768 16