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: Sat Sep 5 02:18:48 2026 Auto Mode Machine = Linux oleg328-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-oleg328-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 3780 9593 598110 450541 64 8 2717 30301 831569 743988 64 16 2415 34010 118315 842003 64 32 2463 53063 1279447 132770 64 64 2151 33954 1279447 576282 128 4 3542 8263 249034 428193 128 8 8065 21000 927549 907174 128 16 6515 59232 1175271 636249 128 32 11409 20470 1391557 1278855 128 64 9714 56915 757430 24936 128 128 5491 102167 1579934 1778862 256 4 9310 8910 588414 225159 256 8 6265 24450 988889 658008 256 16 7692 20306 1094754 583299 256 32 8612 86079 548161 914752 256 64 13059 66908 638445 1312954 256 128 16329 85131 1471270 1591186 256 256 22656 35354 1235882 1938842 512 4 7415 5099 177715 556515 512 8 13931 19069 856319 471062 512 16 14770 22014 742096 1024169 512 32 15561 35734 1261144 698412 512 64 17605 33313 579179 183438 512 128 24397 54209 1434711 1240025 512 256 27184 155290 274095 857687 512 512 36906 79513 584380 1213400 1024 4 9946 11013 583174 245977 1024 8 8354 11809 440066 157857 1024 16 16708 15005 956178 530321 1024 32 17501 31107 615341 518477 1024 64 22613 22752 1541732 567606 1024 128 36095 64357 1008964 1376236 1024 256 24664 94343 1267398 981750 1024 512 55897 76469 1075676 1551198 2048 4 7555 5636 235264 172593 2048 8 9768 11804 572860 486218 2048 16 19095 30111 281907 239308 2048 32 22189 20975 784411 920895 2048 64 23460 46695 1468162 1224194 2048 128 29231 50610 803187 763020 2048 256 34907 43878 1680082 1430271 2048 512 24404 51104 1776319 1004928 4096 4 6259 6952 174862 200951 4096 8 13984 14052 481487 404462 4096 16 17753 16200 298112 372569 4096 32 28817 27905 761053 613351 4096 64 22044 33169 901413 227578 4096 128 35269 37383 718828 341556 4096 256 39238 37014 579191 302938 4096 512 34940 79822 639493 671251 8192 4 2633 8494 334271 288543 8192 8 10938 14101 368493 310409 8192 16 19645 24323 637616 458296 8192 32 25840 30133 851124 643768 8192 64 39458 38231 826058 653788 8192 128 50662 51381 978497 655885 8192 256 49922 57549 576943 745010 8192 512 28347 58105 1434716 591015 16384 4 6841 7939 298568 174068 16384 8 9637 13165 614533 383790 16384 16 18940 19873 552186 350887 16384 32 19288 32167 959035 516455 16384 64 29862 32790 727854 755409 16384 128 26977 51021 850932 520059 16384 256 32245 46382 1330308 1227554 16384 512 36739 70941 1070433 839775 32768 4 5687 5885 348281 254047 32768 8 10570 11239 602485 491244 32768 16 14942 17309 448249 329280 32768 32 22349 28718 935692 590978 32768 64 30362 37267 837221 379421 32768 128 32572 51514 1271113 924445 32768 256