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: Fri Aug 21 15:11:57 2026 Auto Mode Machine = Linux oleg229-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-oleg229-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 4632 11483 603489 537079 64 8 7103 20181 901377 780776 64 16 3584 16255 1083249 1188789 64 32 3535 39976 1330167 1083249 64 64 4750 40977 1204796 1690338 128 4 2801 9916 889145 192785 128 8 5862 18634 876086 757430 128 16 5149 30895 1162547 799146 128 32 6553 28912 1306873 1085013 128 64 12319 84829 217726 730629 128 128 7082 61689 609522 1406136 256 4 5901 10221 602276 268919 256 8 8405 6327 836374 797250 256 16 16000 58050 911645 944525 256 32 17114 62210 51250 1137672 256 64 14476 63952 1362952 771473 256 128 14159 67421 1570244 1463250 256 256 20391 154789 1248819 1881098 512 4 4683 17690 345932 597385 512 8 20010 26107 1496706 589837 512 16 12692 43232 1257451 906185 512 32 22353 57476 1336492 1176828 512 64 20888 73091 780674 1279935 512 128 54671 137926 359062 1337324 512 256 37112 72226 1778004 1705969 512 512 22663 155955 1689859 2391924 1024 4 10131 11464 394293 558019 1024 8 12646 17081 656742 460447 1024 16 34639 59455 1460969 933525 1024 32 19491 48142 922497 473650 1024 64 32512 76378 1133893 1050164 1024 128 44296 86326 1687075 1319577 1024 256 24904 89081 1004716 981974 1024 512 49752 58271 1061060 1169078 2048 4 8433 12876 361000 355428 2048 8 18891 10113 158626 810080 2048 16 21678 15742 1157079 996072 2048 32 28602 53886 1322992 328828 2048 64 45659 56538 1406616 491223 2048 128 55683 75891 1565847 1319740 2048 256 33442 38383 514589 1420104 2048 512 33717 69835 1716680 418290 4096 4 7284 10228 270026 431841 4096 8 15106 10582 683481 241980 4096 16 13479 14258 1322972 459394 4096 32 18137 16941 723795 590377 4096 64 38819 49426 605206 666330 4096 128 28384 50963 658313 404862 4096 256 39553 59202 579269 564351 4096 512 47996 55595 348597 332899 8192 4 6152 6674 357445 388690 8192 8 13998 9849 533993 322469 8192 16 24755 23893 538986 324537 8192 32 12141 24133 745673 352054 8192 64 27439 49058 1024660 610613 8192 128 36798 41353 839008 498170 8192 256 20009 51666 850850 700464 8192 512 36574 39341 641556 850766 16384 4 3348 5357 302986 146682 16384 8 10163 11927 310943 477196 16384 16 13304 16482 421377 225528 16384 32 14946 28119 467871 394928 16384 64 23873 31537 579696 519088 16384 128 32126 33593 982088 847679 16384 256 29549 43033 507796 427557 16384 512 39805 53002 742738 940746 32768 4 5539 6042 304391 208264 32768 8 9213 10371 341692 204958 32768 16 11465 13429 329597 230648 32768 32 14516 18106 790447 618626 32768 64 16969 23031 676606 687828 32768 128 22769 34799 716552 636604 32768 256