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 23:28:11 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 1354 10709 500060 477808 64 8 1927 17851 38436 295047 64 16 3479 15336 508587 799377 64 32 4683 38071 1070292 913649 64 64 7866 21247 955947 1421755 128 4 4041 8746 257022 232230 128 8 2772 14222 711270 347758 128 16 8839 29747 372102 766076 128 32 4868 58344 1022989 208428 128 64 12771 79905 859260 978253 128 128 9664 81420 1377278 1911894 256 4 3009 5205 591005 458706 256 8 7026 23019 812944 764334 256 16 12039 30974 883152 867455 256 32 5096 17169 234861 551823 256 64 9343 37825 1243036 1178892 256 128 17831 110050 59150 1280084 256 256 5914 37280 409542 2228578 512 4 6541 3394 407275 295804 512 8 14269 15059 515626 328823 512 16 16638 7831 1014013 431325 512 32 16911 76385 572691 902757 512 64 6415 111206 717069 1002183 512 128 16206 94904 1242896 796306 512 256 21085 66711 722133 1344020 512 512 16498 38433 885996 1199171 1024 4 4826 10494 214986 157153 1024 8 10338 26771 745291 165830 1024 16 12474 11464 255048 179774 1024 32 9094 24376 730336 1045817 1024 64 16280 31282 1488307 697143 1024 128 34361 50181 1558516 1399100 1024 256 13658 84175 696691 1021928 1024 512 26300 80961 324055 329575 2048 4 14318 5094 273027 212955 2048 8 11579 13454 920895 665844 2048 16 7717 7586 524198 1008349 2048 32 21020 26013 615377 737725 2048 64 19490 27009 752657 380880 2048 128 22755 56003 708927 417619 2048 256 23306 46228 917551 1320552 2048 512 45138 72755 618167 1357275 4096 4 1410 9294 163964 133537 4096 8 9416 11378 415798 382201 4096 16 19029 16864 283244 486753 4096 32 10389 17127 602257 578216 4096 64 15457 22496 526008 596299 4096 128 24239 22080 691070 205715 4096 256 20075 27370 658843 557809 4096 512 32267 50938 991748 287198 8192 4 6206 7486 307506 289338 8192 8 10245 13001 408597 312910 8192 16 17900 15765 611701 284169 8192 32 22938 25305 431862 303824 8192 64 31085 45101 606635 737684 8192 128 23478 91511 298215 457472 8192 256 47266 86394 428587 691958 8192 512 27847 50768 1139029 577107 16384 4 5554 8371 165836 185008 16384 8 11539 11382 143738 598263 16384 16 17884 24988 577165 539853 16384 32 25737 25701 513929 283288 16384 64 22823 37559 660029 496920 16384 128 27478 34307 717683 519764 16384 256 37553 48631 377631 411708 16384 512 22364 54700 948707 968551 32768 4 8038 8081 395490 258487 32768 8 11264 14642 380063 354003 32768 16