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: Wed Aug 19 21:58:36 2026 Auto Mode Machine = Linux oleg444-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-oleg444-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 1802 4578 615952 576282 64 8 2712 17680 720041 516414 64 16 4578 42354 929467 727850 64 32 3196 37670 913649 175815 64 64 3500 52115 653436 1562436 128 4 4512 9306 564055 207141 128 8 3110 17339 336848 707520 128 16 3531 26929 908709 776042 128 32 5766 37702 1121270 927549 128 64 5048 33377 198708 260136 128 128 3809 88464 1584598 1684006 256 4 3303 3424 334206 538809 256 8 4020 8785 320347 400529 256 16 7752 14011 735537 718796 256 32 11186 35970 1152323 937924 256 64 7459 31399 1391207 737558 256 128 11852 78142 69453 1497953 256 256 11096 52373 1729594 1790149 512 4 2995 4393 550523 178706 512 8 5121 14703 411884 627404 512 16 22682 32499 709019 123911 512 32 23808 52583 1038532 846530 512 64 29786 70156 718028 1057974 512 128 33900 40204 1426135 664895 512 256 16521 59848 1528669 1325766 512 512 11806 104981 1080328 1861217 1024 4 4680 4894 269838 153266 1024 8 10406 8993 196352 690975 1024 16 14892 11682 883591 835303 1024 32 12490 25859 1066859 189415 1024 64 9850 16194 1032244 1024121 1024 128 25717 57464 694775 339528 1024 256 21073 65193 1450117 527261 1024 512 25094 40986 135126 493969 2048 4 4725 7550 422716 210657 2048 8 5369 8679 403703 182025 2048 16 9656 14240 280736 427109 2048 32 19428 19653 194193 343737 2048 64 27084 54299 723923 452702 2048 128 21992 31877 831890 547729 2048 256 28302 50866 1235996 748004 2048 512 15449 40359 1228571 1051295 4096 4 1063 4214 139040 288840 4096 8 5873 9929 294737 470207 4096 16 11760 23435 688991 483357 4096 32 17303 19188 409719 607259 4096 64 19698 27428 753509 398875 4096 128 26628 39535 332441 409475 4096 256 24728 60037 980149 515667 4096 512 37312 49200 604950 230293 8192 4 6079 7184 392508 356063 8192 8 7710 9939 329631 166317 8192 16 16233 19235 703836 430633 8192 32 20836 30089 505864 457935 8192 64 22374 27500 324887 669822 8192 128 28625 31299 841659 431704 8192 256 25302 47399 588041 517070 8192 512 26324 66511 693410 293640 16384 4 5451 5425 257399 353491 16384 8 10949 14721 297870 270135 16384 16 13364 13267 319968 515108 16384 32 18257 22991 492458 326895 16384 64 22954 24615 1059148 400685 16384 128 24406 33103 1078734 566119 16384 256 27460 47533 626443 564478 16384 512 33690 51636 1235232 586760 32768 4 5324 6453 270304 249478 32768 8