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 Jul 4 00:27:07 2026 Auto Mode Machine = Linux oleg447-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-oleg447-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 4473 10785 388021 551422 64 8 1718 11611 695778 500060 64 16 6126 12965 318502 224668 64 32 3542 28597 402569 587635 64 64 2290 60597 1255511 1183548 128 4 4834 5498 343970 476031 128 8 9286 11361 761728 695603 128 16 6978 15928 1102844 831319 128 32 9537 18929 1142750 396271 128 64 8905 92887 183119 1093856 128 128 5512 20476 789741 1471662 256 4 4541 5265 428159 518013 256 8 5118 12332 701422 60319 256 16 9828 8008 1027695 55078 256 32 5731 18435 455398 876662 256 64 15516 104319 1237306 518263 256 128 12182 48940 1430119 300784 256 256 20760 64016 524593 2049885 512 4 6719 6549 328421 284781 512 8 6428 12202 317214 330087 512 16 16861 17992 389615 199620 512 32 8394 15495 623578 810124 512 64 24034 53145 664073 307142 512 128 15293 31604 649609 486207 512 256 15313 73574 1560891 1130370 512 512 24537 75942 1747618 184971 1024 4 9668 3546 159003 212015 1024 8 8885 8554 258253 67434 1024 16 21266 21362 841522 535812 1024 32 20952 35714 1058967 1104727 1024 64 24654 52149 1000037 393246 1024 128 15592 34925 624740 1121751 1024 256 30896 73521 547003 240603 1024 512 20248 51447 194979 380361 2048 4 5419 8482 296554 297416 2048 8 11603 10805 358484 801912 2048 16 13615 20246 421823 491842 2048 32 19832 23972 1130878 942415 2048 64 29356 37079 787720 597070 2048 128 20364 66788 928359 807263 2048 256 31854 52821 542368 1276022 2048 512 35163 98918 1009890 709630 4096 4 7558 6984 356230 221716 4096 8 10746 13477 253495 519927 4096 16 12858 17292 280855 563333 4096 32 23458 29626 624386 748258 4096 64 30854 42559 714939 301222 4096 128 29665 43995 1613162 689212 4096 256 34331 46747 836092 506679 4096 512 30174 50458 777974 538455 8192 4 6520 6549 299416 268238 8192 8 11426 13729 404804 271655 8192 16 21018 19041 739956 378312 8192 32 29296 40784 484671 401592 8192 64 29829 40900 503684 454356 8192 128 34974 41742 657517 425319 8192 256 44326 65829 354615 501193 8192 512 28278 45753 363522 370296 16384 4 5882 5973 364017 397668 16384 8 9443 12271 477096 425236 16384 16 14913 16841 753529 555072 16384 32 18897 26284 495104 287277 16384 64 25018 30836 483416 403309 16384 128 23827 34074 381121 391915 16384 256 36408 56868 499498 406439 16384 512 34546 48710 1053352 652694 32768 4 5294 5108 172574 373961 32768 8