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 2 16:29:53 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 3976 14595 735831 592827 64 8 4169 11609 727850 725882 64 16 8531 44629 1828508 1421755 64 32 4663 51288 1279447 1029254 64 64 3985 94826 1304314 1933893 128 4 6592 13318 520321 606767 128 8 5296 18675 673778 799146 128 16 5388 51509 416888 921183 128 32 5257 52307 1185654 983630 128 64 16791 57531 369795 1421023 128 128 12983 35330 1579934 2035099 256 4 3513 3682 545654 527687 256 8 10705 22320 934659 794889 256 16 11750 21865 996229 920240 256 32 8198 55724 1274008 1044693 256 64 18493 63652 1334162 1274008 256 128 15587 59729 1552085 1430119 256 256 14545 51684 1704877 1970871 512 4 7545 10257 617482 292899 512 8 16396 18935 835010 254597 512 16 12281 11559 876593 511451 512 32 7046 20277 1306409 799865 512 64 13449 53838 1410215 345710 512 128 32982 121934 1492545 1347393 512 256 18876 33102 1778004 1344020 512 512 24179 101748 1655979 1764853 1024 4 6028 9507 351389 243343 1024 8 19411 20030 622927 798201 1024 16 17533 14323 969561 439841 1024 32 42870 52838 293676 712644 1024 64 34331 53203 780363 872995 1024 128 41918 87424 489912 837257 1024 256 50859 170666 2276316 933525 1024 512 76246 125105 1431748 1096268 2048 4 11522 9157 237916 180298 2048 8 12462 15503 993193 571260 2048 16 26399 18199 207417 367754 2048 32 26048 32892 745860 1202599 2048 64 21877 35748 122759 240939 2048 128 53215 74586 1484143 680401 2048 256 45876 52911 999433 1058420 2048 512 56014 48239 1004458 1505736 4096 4 12492 11323 393133 258259 4096 8 11900 9280 332171 175462 4096 16 18119 15633 482501 732591 4096 32 23172 48913 820832 1017414 4096 64 45361 62789 1466509 683128 4096 128 67000 49292 340142 1164594 4096 256 22138 35914 712863 790285 4096 512 23713 69489 424405 508448 8192 4 4600 2705 215589 220369 8192 8 7654 11141 262581 377285 8192 16 10597 13137 580334 618873 8192 32 19642 27708 839951 629970 8192 64 24850 30744 480436 908199 8192 128 31048 44108 1525214 602973 8192 256 28920 56436 950902 918076 8192 512 36134 65043 722331 823050 16384 4 6360 6882 418620 269659 16384 8 9018 13278 504834 457143 16384 16 15597 23375 569285 535917 16384 32 25562 34634 852273 771376 16384 64 18964 33722 441866 393062 16384 128 32357 38655 844273 854892 16384 256 36544 44446 1214901 911135 16384 512 24188 45557 629213 573849 32768 4 5300 6609 377141 388466 32768 8 11885 13970 389724 600346 32768 16 18264 22164 489812 433605 32768 32 24909 30466 806837 837394 32768 64 28716 38670 1126052 762381 32768 128 33121 46002 706329 313926