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 12 22:18:15 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 3010 9408 378715 457452 64 8 2309 4180 397796 511494 64 16 6167 35835 727850 363829 64 32 4741 37980 1143223 546928 64 64 6751 47411 735831 290890 128 4 4013 6799 200339 444501 128 8 4617 19783 612303 174830 128 16 10082 33596 780556 406472 128 32 10281 13019 646983 143671 128 64 5128 16456 841746 1093856 128 128 4657 11536 962469 1618028 256 4 6130 8943 498995 335879 256 8 9887 21563 363142 380381 256 16 6423 32023 1027695 382140 256 32 9380 26710 588736 904732 256 64 19687 61199 709299 1142514 256 128 8972 35383 1286217 1098113 256 256 12035 19683 562520 1897721 512 4 5997 3077 425935 59457 512 8 7028 16275 408981 486648 512 16 11160 11445 934173 502358 512 32 15335 30467 651383 929322 512 64 12130 24225 1168504 416921 512 128 16323 47279 811349 1296159 512 256 24249 66850 1496706 1410215 512 512 32603 60121 606667 2047551 1024 4 3468 6074 276990 193835 1024 8 12791 13444 422283 398279 1024 16 11848 22088 413581 842017 1024 32 13714 32765 481185 474277 1024 64 29244 32768 512782 519292 1024 128 30783 35425 1247519 939446 1024 256 36158 33989 528363 602396 1024 512 19190 57902 800582 524556 2048 4 5349 2971 244422 310309 2048 8 16042 9263 299323 479729 2048 16 11282 11768 440062 402682 2048 32 15025 11889 330588 519411 2048 64 19936 29930 533046 595332 2048 128 11779 23717 1396100 788009 2048 256 38922 55649 1317109 746055 2048 512 14228 28792 389428 1065642 4096 4 1011 4840 175208 280474 4096 8 10205 10605 237863 411407 4096 16 9315 12409 289083 391137 4096 32 20775 23811 721636 743498 4096 64 23693 28016 858358 398486 4096 128 20847 33803 521047 315540 4096 256 36790 46349 1466634 798588 4096 512 34251 48492 760918 585069 8192 4 5434 6185 258667 213222 8192 8 9684 14114 425119 386251 8192 16 15622 21365 472021 449200 8192 32 16957 25717 626307 264701 8192 64 22438 36750 801658 697011 8192 128 27832 35370 899121 606635 8192 256 28765 60059 726685 760208 8192 512 34571 43976 845074 613996 16384 4 5309 6323 656197 249851 16384 8 11381 13877 607267 516634 16384 16 19015 17310 455872 299250 16384 32 22656 24715 515220 629283 16384 64 16397 20919 813587 477401 16384 128 25311 37045 900756 731916 16384 256 30270 37924 1228102 708654 16384 512 36552 60259 670899 440702 32768 4 4831 6443 221472 227767 32768 8