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 17:26:53 2026 Auto Mode Machine = Linux oleg315-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-oleg315-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 1827 6371 659861 565358 64 8 3279 13528 170240 51733 64 16 1509 19638 952555 710511 64 32 1646 21658 219165 96358 64 64 4580 23229 998622 1599680 128 4 4635 12400 561107 188520 128 8 5877 14293 790905 715059 128 16 7940 12392 927549 831319 128 32 6161 17844 381082 272965 128 64 5488 36405 711270 66768 128 128 3275 39961 1406136 81371 256 4 3539 7363 235945 559005 256 8 4289 7177 805021 170008 256 16 9588 39715 603970 312242 256 32 5285 39155 1128110 966633 256 64 8026 86663 1398455 124393 256 128 7970 30443 934659 834424 256 256 7113 24871 1376935 1871263 512 4 2904 4640 531186 65414 512 8 4346 8634 230322 651383 512 16 10179 19478 533827 453169 512 32 13558 35859 1242177 165053 512 64 7101 11799 1179413 788992 512 128 19811 26878 1322500 1080328 512 256 22303 78167 1140576 1380303 512 512 13017 19876 1604029 1527582 1024 4 5683 4400 233196 251170 1024 8 5317 20211 544162 677246 1024 16 16751 33655 429505 550227 1024 32 11004 28942 930088 641633 1024 64 12622 20915 318315 1082454 1024 128 22197 63092 1019744 749583 1024 256 28893 24678 1175799 252084 1024 512 15269 44096 413900 516917 2048 4 6774 6426 370882 136706 2048 8 7775 8950 362922 688637 2048 16 10833 15176 550537 384460 2048 32 26635 24962 426769 561257 2048 64 20891 39251 584317 541104 2048 128 30890 34934 404026 484491 2048 256 52112 66871 1758140 758238 2048 512 27700 52201 1484143 770480 4096 4 5841 5636 396554 250933 4096 8 9731 7011 360816 166072 4096 16 19290 20148 475175 379047 4096 32 18690 30479 558662 419750 4096 64 24320 35545 598918 835564 4096 128 30110 58044 904403 244857 4096 256 34213 29721 685883 764745 4096 512 28395 37807 1017655 785731 8192 4 7798 2264 327573 220659 8192 8 16865 10151 468245 373516 8192 16 19706 22729 293957 257579 8192 32 16841 28275 643370 730967 8192 64 23754 19543 1137144 736562 8192 128 27340 40618 266545 711428 8192 256 30503 50306 556299 460562 8192 512 25970 36503 647529 706266 16384 4 5961 6123 226605 149042 16384 8 9900 8581 636563 270850 16384 16 15512 17443 326108 574132 16384 32 22918 25076 483134 294370 16384 64 37062 33904 220300 392770 16384 128 21777 54474 710463 276967 16384 256 28173 34656 990325 763186 16384 512 32675 37365 941120 909363 32768 4 6193 6667 187741 198911 32768 8 10330 12103 314883 405314 32768 16 15036 17679 460730 411828 32768 32 14903 22084 575846 509762 32768 64 23338 35266 846670 639412 32768 128