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 Mar 15 16:59:47 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 2137 4486 426897 500060 64 8 2339 3854 780776 673098 64 16 1402 39970 710511 769584 64 32 8293 44725 1002351 435909 64 64 3144 72416 321554 1188789 128 4 3050 8315 680612 504196 128 8 6251 9640 307696 357483 128 16 4651 25281 86136 985435 128 32 12896 32702 1102844 148643 128 64 4308 53490 1165070 1074159 128 128 8310 68158 1598754 1579934 256 4 7861 8731 535583 482189 256 8 8977 9831 1354356 399486 256 16 6472 7118 1015065 627623 256 32 16709 51822 380515 457143 256 64 19659 114693 1924938 677095 256 128 8414 67531 1208072 1375171 256 256 9985 124812 1280084 1137672 512 4 7270 9068 340178 422416 512 8 5812 14598 768658 317449 512 16 14422 25841 240027 876593 512 32 12810 38061 1700565 1184618 512 64 16642 45878 1394645 1207940 512 128 19968 54647 1541840 1350783 512 256 35526 72954 632206 898225 512 512 33158 80784 684608 1406520 1024 4 10141 10878 278626 342479 1024 8 13275 18933 507931 343053 1024 16 16806 34928 982873 378284 1024 32 26826 38248 1193442 722230 1024 64 33302 46940 920914 700898 1024 128 24666 82956 593653 199730 1024 256 29822 55378 898941 1209234 1024 512 41934 81095 1602715 215721 2048 4 8264 9130 503932 200939 2048 8 8673 7798 667085 413001 2048 16 10120 12556 685833 448448 2048 32 17810 33039 420193 436684 2048 64 22065 36123 911901 395889 2048 128 25895 31144 329623 914717 2048 256 28313 39510 1142916 1317109 2048 512 31292 56863 359053 921686 4096 4 3586 4200 259703 208342 4096 8 9331 6570 255680 288655 4096 16 13623 10934 479565 259041 4096 32 16539 16031 593887 262750 4096 64 1503 21842 1043049 834873 4096 128 14981 27763 689433 560411 4096 256 31396 29526 1539303 706095 4096 512 28786 38379 590113 923360 8192 4 4925 4796 258797 288876 8192 8 6145 8394 367174 397669 8192 16 8623 14124 570515 287833 8192 32 24287 17697 686675 459607 8192 64 15347 23644 719910 623342 8192 128 22115 31361 715458 413361 8192 256 21169 35601 645449 472163 8192 512 35003 44890 903613 623862 16384 4 4720 4780 337842 235494 16384 8 5672 7491 242409 194395 16384 16 10879 14062 629110 565374 16384 32 17692 21317 730259 577815 16384 64 21611 31494 479135 454593 16384 128 27366 34719 469174 434702 16384 256 20697 34129 907645 394642 16384 512 25543 58432 1057030 996645 32768 4 5585 5838 329058 226860 32768 8