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 Sep 14 22:20:58 2026 Auto Mode Machine = Linux oleg351-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-oleg351-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 3097 5165 551422 542506 64 8 2906 18957 735831 587635 64 16 8526 20401 926260 627470 64 32 1941 60775 500060 955947 64 64 3428 59934 1101022 1279447 128 4 5163 5452 438331 374176 128 8 4941 12389 814915 609522 128 16 11901 30124 985435 927549 128 32 5670 34659 1142750 723735 128 64 11055 93779 1074159 226546 128 128 7190 27966 744820 441576 256 4 4968 11945 408297 279780 256 8 5428 7723 773697 488551 256 16 4344 17340 775373 211374 256 32 10380 25487 1108314 780445 256 64 20636 37188 624339 673696 256 128 18473 49458 1481420 1430119 256 256 18404 110526 662883 973645 512 4 8482 7893 400365 436497 512 8 8333 13557 521385 454320 512 16 9860 16665 1020276 795127 512 32 8996 21368 508905 927716 512 64 44122 71250 1375881 1236455 512 128 26049 94325 1575781 1280699 512 256 44923 43467 1462061 644927 512 512 23261 68825 586454 1968713 1024 4 10779 8426 344098 203092 1024 8 9658 10391 235085 202251 1024 16 20916 13904 662414 426307 1024 32 11437 44187 1623311 507151 1024 64 26585 75366 454503 1095150 1024 128 9925 27195 1192117 1070048 1024 256 22707 71204 1033486 1673273 1024 512 40562 118010 1743932 244855 2048 4 4767 5564 250670 227254 2048 8 12705 11792 676596 127109 2048 16 19623 28148 1138372 434278 2048 32 18929 31164 285315 571564 2048 64 11542 27163 507925 1270361 2048 128 21118 48964 710922 1317109 2048 256 22111 96658 831165 1502575 2048 512 23504 42927 1385740 1627866 4096 4 3477 5629 189839 279571 4096 8 16827 9420 415416 448480 4096 16 11010 27604 310870 184545 4096 32 12232 16898 823982 714702 4096 64 38985 65440 859431 687365 4096 128 40877 31385 811412 456634 4096 256 20532 27751 449772 1074493 4096 512 23231 87519 1738535 1251465 8192 4 7782 7899 149770 302263 8192 8 8751 7752 229628 301719 8192 16 13021 26968 706034 406528 8192 32 13065 21816 714268 141529 8192 64 24119 20219 331901 234197 8192 128 20927 33959 293239 338470 8192 256 20766 18612 454988 420319 8192 512 18939 27655 312410 311447 16384 4 5626 6239 223437 142884 16384 8 10312 11442 327962 331760 16384 16 18823 17769 410319 636888 16384 32 20709 23376 373550 326147 16384 64 23469 32641 1036902 613677 16384 128 32752 39142 468180 353241 16384 256 43866 55134 521764 631805 16384 512 43001 53595 707457 493774 32768 4 7569 9035 327038 209402 32768 8 10935 11970 406293 354716 32768 16