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: Thu Aug 27 12:11:23 2026 Auto Mode Machine = Linux oleg643-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-oleg643-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 1369 4455 528618 496362 64 8 1943 10262 743988 615952 64 16 3295 24931 939223 353294 64 32 3567 35321 1357066 866463 64 64 5038 54144 1232453 1392258 128 4 3017 14086 581781 301985 128 8 4669 14673 790905 847059 128 16 3895 8199 990891 542400 128 32 5700 31873 571865 1015251 128 64 2944 16167 809997 630273 128 128 3764 12659 1165070 1975201 256 4 5363 9688 381056 379306 256 8 6577 11134 242883 446870 256 16 11293 10935 752549 498995 256 32 9220 27297 1235882 326583 256 64 11747 52225 1208072 1122215 256 128 4841 68963 1274008 492360 256 256 10810 55183 1561112 1652404 512 4 4351 12748 318626 250470 512 8 8770 7497 366226 658978 512 16 4828 13267 875164 470546 512 32 9023 26127 1066380 78000 512 64 6871 23653 1201856 1047141 512 128 22893 65769 1391032 919375 512 256 7545 61545 739795 693675 512 512 21790 88534 382399 2169601 1024 4 4182 5548 658151 466752 1024 8 13471 7474 553560 207198 1024 16 12368 12292 907105 134630 1024 32 21416 42034 1283303 632467 1024 64 30965 62268 705271 941299 1024 128 18666 37653 1501838 1037480 1024 256 12043 48188 1248607 422949 1024 512 20624 130677 918354 1501313 2048 4 4018 7336 342996 216143 2048 8 14196 25223 929666 363321 2048 16 13863 47046 686546 580330 2048 32 23492 24208 1338662 843075 2048 64 13109 19443 1432179 796928 2048 128 37246 75230 712573 650171 2048 256 33151 45288 1671581 1611376 2048 512 18059 47012 1069489 1666393 4096 4 11924 11387 598126 402906 4096 8 12771 24102 530033 610063 4096 16 13869 21940 686074 406472 4096 32 12591 50357 827155 931117 4096 64 18901 21266 422922 484447 4096 128 24565 36171 704762 343077 4096 256 43823 73350 554711 1111835 4096 512 60411 71150 539572 1027577 8192 4 6090 11223 233883 146928 8192 8 9487 2123 201307 317543 8192 16 17258 20062 397209 410153 8192 32 12006 12649 448263 494955 8192 64 17351 49941 780339 377389 8192 128 16979 29330 950008 497507 8192 256 40200 48492 1444244 585306 8192 512 36215 36333 462067 561674 16384 4 4704 3528 139695 120457 16384 8 4819 16654 572725 514264 16384 16 13270 10150 370535 204546 16384 32 11499 18765 420835 538360 16384 64 20652 21170 656830 562137 16384 128 27930 38711 683260 697668 16384 256 32657 37076 765644 852526 16384 512 35600 42500 1274310 711515 32768 4 4646 6974 209787 136157 32768 8 7368 8993 372439 313701 32768 16