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 Feb 7 01:52:49 2026 Auto Mode Machine = Linux oleg354-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-oleg354-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 5867 8447 290890 246314 64 8 12716 38050 432398 410573 64 16 8792 50630 735831 673098 64 32 10045 78701 1255511 1049372 64 64 5887 106826 1734015 2772930 128 4 15429 22881 439767 251956 128 8 17555 32611 481150 380003 128 16 11550 70763 710329 662962 128 32 31809 109771 853794 983630 128 64 40892 125237 1939522 1406136 128 128 32429 136893 1152564 2027414 256 4 16683 18743 260692 306537 256 8 22410 37166 618227 431775 256 16 33746 61315 602276 682691 256 32 27796 99422 879535 886067 256 64 25301 113182 1185399 1036624 256 128 29193 155822 1570244 1089202 256 256 49872 172272 1495866 1231629 512 4 18194 21501 278720 326573 512 8 23750 39668 400291 419692 512 16 42527 60484 665926 599553 512 32 50284 87774 1273106 790153 512 64 37544 117703 1117430 1541840 512 128 63531 157200 1442420 1282994 512 256 58341 149662 1354190 1547395 512 512 79601 202367 1705969 1909204 1024 4 18052 21473 342697 297233 1024 8 30383 37241 461685 469713 1024 16 45058 60587 698504 755251 1024 32 73780 104138 915028 1026078 1024 64 79744 147782 1053512 1217806 1024 128 84626 151520 1646334 1256277 1024 256 90274 149204 1854631 1523683 1024 512 100868 204592 2251260 1709231 2048 4 21453 21663 299146 278832 2048 8 29222 42130 547729 428814 2048 16 50413 71416 886583 820213 2048 32 72999 97826 1026055 949499 2048 64 86556 117195 1248753 1099890 2048 128 87882 133560 1485169 1315496 2048 256 78772 178270 1297023 1415424 2048 512 97939 173412 1681397 1629410 4096 4 19710 21989 339551 310937 4096 8 27631 34512 496114 290328 4096 16 39968 66767 512972 378905 4096 32 72466 83143 1101075 836255 4096 64 55921 88281 1228115 1223044 4096 128 99465 112906 2033889 1293781 4096 256 82562 117370 1555611 1552658 4096 512 107346 123155 1744360 1416802 8192 4 17124 19511 299293 278998 8192 8 30029 33897 266449 456451 8192 16 42024 39739 329460 466382 8192 32 37296 62089 657517 709313 8192 64 53612 76395 1533519 1526095 8192 128 93093 144192 1665780 1384702 8192 256 82173 159787 1556795 1578973 8192 512 75030 136260 1508673 1270662 16384 4 15662 16221 316782 170865 16384 8 29289 32022 469037 340914 16384 16 37368 52002 821956 844626 16384 32 52989 59857 675131 730904 16384 64 56712 87410 1204784 1008433 16384 128 66275 86602 1061750 959972 16384 256 74869 99285 1008684 1346469 16384 512 83971 100285 740960 543973 32768 4 14887 15387 294776 182048 32768 8 4642 13542 296017 191797 32768 16 26571 28369 508813 409094 32768 32 31554 39686 560616 521990 32768 64 43773 34375 363886 286993 32768 128 26062 42748 643658 1033757 32768 256 48062 64190 909536 916254 32768 512 31194 56337 1113986 939369 65536 4 6302 7094 83077 150970 65536 8 13712 20487 318899 294496 65536 16 25839 33136 541825 550662 65536 32