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: Tue Jun 9 05:31:16 2026 Auto Mode Machine = Linux oleg210-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-oleg210-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 4205 12640 633392 586352 64 8 4877 17515 492717 913649 64 16 2606 31715 393135 760859 64 32 6806 30435 1421755 1279447 64 64 8499 65173 1336792 1734015 128 4 6561 9391 621518 598647 128 8 2634 19515 643108 129685 128 16 7193 12650 1067750 576780 128 32 5281 11745 1240443 165813 128 64 4013 32971 1254941 1332828 128 128 5613 31381 824932 1508887 256 4 5306 9557 599585 1040643 256 8 7217 15580 322463 783292 256 16 7850 28122 1019886 592309 256 32 17318 74313 1561112 980760 256 64 8521 27245 1420658 605332 256 128 10224 20293 714967 1455317 256 256 17549 76489 1814348 837026 512 4 3060 2843 433152 171007 512 8 6440 17627 815353 516618 512 16 22728 15229 1011625 915847 512 32 28457 56606 1060063 734482 512 64 33261 69029 1368865 1219602 512 128 31996 59088 1492545 832420 512 256 19803 105305 722133 1640796 512 512 24427 122225 1533034 1417662 1024 4 8147 6071 190297 600207 1024 8 15102 13106 391561 159950 1024 16 7931 15601 173437 218431 1024 32 19441 35218 606307 1048113 1024 64 32452 43598 417278 409950 1024 128 38619 44698 1126458 831261 1024 256 21259 77734 1715375 418661 1024 512 15978 86499 1054547 1028289 2048 4 8049 4359 660215 292903 2048 8 12930 9781 491955 775208 2048 16 16489 21913 426663 439657 2048 32 25838 36915 673202 713105 2048 64 15797 30889 1002933 675001 2048 128 36924 45572 662149 609353 2048 256 41947 76179 391737 1437211 2048 512 28640 45050 198602 388091 4096 4 4809 7014 219050 194466 4096 8 16848 7015 395596 344259 4096 16 14105 16733 622395 576180 4096 32 14158 18623 816774 665813 4096 64 14904 28069 1483990 842282 4096 128 35837 46057 1569969 393656 4096 256 32049 56834 1476592 1385271 4096 512 35539 56586 900799 1019649 8192 4 7418 9190 166132 378804 8192 8 9219 10531 151785 135000 8192 16 19810 15494 342502 484740 8192 32 14454 24587 709812 706020 8192 64 13990 32012 1010734 747929 8192 128 36651 39530 707663 428811 8192 256 29375 41392 964922 698982 8192 512 31878 26609 492338 499118 16384 4 6766 6562 254330 112000 16384 8 5743 10719 330203 227265 16384 16 30329 28362 342239 261145 16384 32 15825 42599 479875 435617 16384 64 34712 29644 1063541 721920 16384 128 34163 126197 1623621 1815631 16384 256 37248 51071 633880 393853 16384 512 37243 57785 948760 761377 32768 4 6832 10204 387433 262524 32768 8 10400 10338 292003 230583 32768 16 25818 20574 818991 413570 32768 32 18792 33828 1539625 988237 32768 64