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 Sep 13 08:39:51 2026 Auto Mode Machine = Linux oleg324-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-oleg324-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 2175 7160 571375 496362 64 8 3090 14601 886494 321940 64 16 3213 19208 998622 901377 64 32 4209 24853 1304314 1357066 64 64 3717 71415 1638743 1734015 128 4 2216 4217 579270 621518 128 8 4000 15236 183935 695603 128 16 7879 25549 809997 263973 128 32 4595 57997 584313 805138 128 64 9701 55314 889145 1048974 128 128 6772 67118 1346196 1332828 256 4 3129 3732 600928 522297 256 8 9318 16280 904732 757326 256 16 10343 21474 440634 72521 256 32 9664 51832 1089202 1084800 256 64 11386 36524 1094754 537729 256 128 6544 31090 690151 1540948 256 256 12946 55675 1802167 2192179 512 4 9173 8563 457514 565156 512 8 12352 20313 1017858 756474 512 16 13860 18214 769761 932550 512 32 5360 22935 682649 1210664 512 64 7593 30355 1387437 1383861 512 128 16527 57541 1667552 1533034 512 256 13142 26757 266642 581846 512 512 23041 57697 522526 365665 1024 4 6003 7839 239757 310020 1024 8 9460 12383 160879 238016 1024 16 13148 14387 910373 239196 1024 32 10813 21600 656441 417278 1024 64 19546 28459 794951 270178 1024 128 18882 49107 981750 903860 1024 256 43408 34046 687216 500007 1024 512 23757 31690 1078919 968686 2048 4 4560 6339 405878 387880 2048 8 14595 10718 613706 331123 2048 16 25102 24004 373251 1000947 2048 32 18067 23420 788298 466291 2048 64 20615 34526 992734 526060 2048 128 39048 36107 770272 326157 2048 256 37254 43931 432615 664043 2048 512 48085 51236 948136 700201 4096 4 5829 6012 346593 320652 4096 8 12662 9869 375813 326217 4096 16 23511 17263 726765 573986 4096 32 19222 29895 621742 355126 4096 64 27725 43309 663756 385027 4096 128 39437 48446 420448 520589 4096 256 27934 47478 396701 683808 4096 512 45176 39826 461367 505739 8192 4 5445 6066 245910 200034 8192 8 10441 2260 425445 348982 8192 16 15380 18831 371216 363215 8192 32 21480 28867 824314 513768 8192 64 25162 34212 533612 629820 8192 128 25836 33892 361343 598875 8192 256 30296 54069 589019 756625 8192 512 38056 32680 973396 870554 16384 4 5720 5556 194852 250217 16384 8 9280 11272 291732 306369 16384 16 17635 20409 563681 488797 16384 32 23690 23987 696212 666449 16384 64 22078 26049 638201 752629 16384 128 23415 38461 720686 623058 16384 256 32426 26449 567274 972636 16384 512 20044 37377 1000067 846979 32768 4 7962 8193 221653 149165 32768 8 10787 10799 554049 414444 32768 16 13195 14649 592131 397024 32768 32 25400 37461 828310 868372 32768 64 28608 31333 912883 866784 32768 128 25753 33165 483446 497486 32768 256 35681 31001 891570 895374 32768 512