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: Sun Jun 7 00:58:16 2026 Auto Mode Machine = Linux oleg246-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-oleg246-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 5054 21723 1033216 528618 64 8 6061 29077 24661 852702 64 16 10664 43507 1029254 831569 64 32 11020 80495 1991276 863676 64 64 7776 84658 1484662 1484662 128 4 6484 9817 603357 526961 128 8 13180 29197 919605 1196221 128 16 16550 28828 1000121 990891 128 32 11850 92567 1346196 853794 128 64 8605 92951 1217930 1133103 128 128 28155 103887 1561553 2420455 256 4 7735 15826 605332 488551 256 8 15079 26034 713067 746272 256 16 24481 47813 976301 913973 256 32 38467 107387 1028679 937924 256 64 30578 112825 1610276 1304976 256 128 42460 174739 1591186 1274008 256 256 18846 39468 1707589 1168627 512 4 13412 12589 602919 390820 512 8 19352 21033 1418599 447597 512 16 17348 51576 724081 942786 512 32 27633 57141 1398278 479369 512 64 38053 46001 1166599 1565443 512 128 41918 117189 1500891 511451 512 256 26251 102379 1323315 1387437 512 512 40314 62614 1674052 3239989 1024 4 9968 17118 693317 380934 1024 8 24963 34403 1058967 624831 1024 16 37366 50017 1057924 1171629 1024 32 55925 78510 1697745 988301 1024 64 27994 59382 516358 1073257 1024 128 32952 83284 2290886 1695065 1024 256 72871 192843 1400926 1350701 1024 512 64245 81268 1436056 625194 2048 4 11154 16974 371026 301044 2048 8 20157 26220 897795 626508 2048 16 37754 46890 1007403 327462 2048 32 51232 76818 1231389 589692 2048 64 62591 114508 915107 1155212 2048 128 61174 156107 1542232 1479542 2048 256 43144 102780 1013824 813301 2048 512 37820 109530 2354177 820134 4096 4 11344 16355 576819 475438 4096 8 25781 30721 1034632 975917 4096 16 32565 47851 1279615 944633 4096 32 50750 38342 951698 750743 4096 64 41628 70402 1040144 648717 4096 128 42568 121143 1137453 717328 4096 256 108119 132599 1561549 1086521 4096 512 100377 122476 1658960 1765513 8192 4 15712 16664 424279 400996 8192 8 23631 28525 550576 815123 8192 16 40384 47884 916533 1016506 8192 32 64411 82823 1642607 1046378 8192 64 60357 91504 1318748 1398226 8192 128 78510 122936 1406871 1347820 8192 256 88854 115666 1936108 1325105 8192 512 63745 89498 1302402 1511726 16384 4 15072 18079 645060 637360 16384 8 29478 32070 1209875 889471 16384 16 47737 54156 715836 641651 16384 32 61745 73171 1392497 1067855 16384 64 72871 108790 1778923 1401528 16384 128 75704 89993 1604365 833147 16384 256 81980 124640 1667592 1411691 16384 512 98102 151471 1604852 1300106 32768 4 17636 16606 567058 631659 32768 8