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 Aug 11 16:40:19 2026 Auto Mode Machine = Linux oleg339-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-oleg339-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 3193 12740 863676 259156 64 8 5747 28144 789967 275939 64 16 8328 19625 1143223 913649 64 32 8340 58715 1226821 1163036 64 64 5225 81299 1780008 1828508 128 4 4589 8618 252549 624409 128 8 10437 23938 914904 836500 128 16 9601 12957 1306873 1684006 128 32 18486 61274 1254941 1165070 128 64 15058 80144 1543594 1373754 128 128 18895 113484 1663139 1778862 256 4 9363 15093 374281 630572 256 8 11403 23067 198921 519266 256 16 14806 42300 1267990 528987 256 32 19256 51447 1153561 1213534 256 64 26873 54993 1361224 1422540 256 128 21673 114644 1675612 1686137 256 256 10758 137715 1686137 2187712 512 4 4598 11433 331616 165003 512 8 10981 13842 856319 565007 512 16 20914 41426 578554 712076 512 32 31616 72543 689886 1105920 512 64 41015 82421 1347393 779258 512 128 33990 122024 1463057 1488408 512 256 21084 124543 1001715 264866 512 512 42613 110439 896351 2024389 1024 4 10794 12376 335523 510709 1024 8 15331 15128 582146 751813 1024 16 30448 14798 757382 445776 1024 32 22564 66683 1193442 840041 1024 64 37695 67505 462281 1091809 1024 128 46607 60100 1203137 1084640 1024 256 35236 50127 1026078 515366 1024 512 47982 150696 1078919 1039740 2048 4 8618 11258 313012 302411 2048 8 22218 19662 843821 732504 2048 16 20309 34099 958397 723435 2048 32 25996 65150 1075111 533741 2048 64 46109 68348 337896 319996 2048 128 48602 74657 455800 1397918 2048 256 59692 54681 1303716 1581414 2048 512 48271 94351 1301938 911514 4096 4 11464 12862 338901 392603 4096 8 18803 17521 794709 819696 4096 16 28181 30013 543670 757663 4096 32 32192 38947 943336 437928 4096 64 38635 19717 686074 885660 4096 128 66989 70577 1448823 934714 4096 256 69353 60409 1196552 526202 4096 512 40711 83905 964196 1038823 8192 4 11330 11776 609530 347915 8192 8 13134 19429 725152 743366 8192 16 23180 23050 344881 531532 8192 32 39741 27857 548292 978859 8192 64 43664 60152 1381695 1148471 8192 128 51946 54429 1137295 937514 8192 256 55829 85143 1576872 1418018 8192 512 70272 81530 1440973 1570816 16384 4 4806 11970 390682 412237 16384 8 16853 20485 782389 523250 16384 16 25510 29551 912914 645472 16384 32 35778 33943 1375302 1091759 16384 64 33752 60585 1094524 628868 16384 128 47346 69546 820062 1180223 16384 256 38123 83429 1034794 684894 16384 512 64878 74099 845197 345976 32768 4 10221 11670 490685 348107 32768 8 13293 17722 728957 495411 32768 16 21892 26605 961052 762487 32768 32 35407 46048 775777 1036932 32768 64 45038 69796 821395 788529 32768 128 41782 63817 655348 848101 32768 256 48124 78386 1401482 1112399 32768 512 62198 96298 1630262 817793 65536 4 9679 10039 505643 520606 65536 8