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 Oct 24 01:27:45 2025 Auto Mode Machine = Linux oleg256-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-oleg256-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 13330 22735 481234 359444 64 8 14317 36488 503814 361867 64 16 21080 47868 633392 615952 64 32 23493 79517 1734015 1232453 64 64 19850 99243 1143223 1553394 128 4 16066 17997 240124 357483 128 8 17911 29622 375485 336005 128 16 22606 61505 761728 883293 128 32 31250 85450 1455701 1015251 128 64 32291 109771 1185654 962469 128 128 33367 109413 1487977 1266785 256 4 14907 18899 250534 277037 256 8 27645 31147 668246 387379 256 16 32800 49259 808050 762164 256 32 33152 76440 1190657 885337 256 64 47513 96778 1662639 904732 256 128 43887 111838 2118645 2152625 256 256 61554 106842 1588832 1911233 512 4 16278 18662 395644 427036 512 8 30181 36140 577776 378424 512 16 36736 58849 1002183 879465 512 32 58101 91007 967855 1082507 512 64 72769 92187 1213400 1463057 512 128 49703 156867 1672748 1695195 512 256 73416 134910 2207515 1992458 512 512 66432 148534 2597325 1875849 1024 4 22285 21602 353442 381374 1024 8 32069 37741 751945 396294 1024 16 45376 65339 664566 575285 1024 32 66745 82156 1342258 935966 1024 64 68175 113563 1565902 1381993 1024 128 91118 129703 1805514 1151834 1024 256 89518 166421 1961346 1914144 1024 512 96512 159103 1995982 2497356 2048 4 23867 22037 327312 357603 2048 8 36599 50256 472862 752921 2048 16 48045 60968 850168 641623 2048 32 69605 89883 1505736 1427182 2048 64 85067 135441 1887563 1177057 2048 128 101773 152903 1511299 1304508 2048 256 103512 190157 2356760 1393156 2048 512 101552 192859 1831618 1848169 4096 4 20731 24792 399961 337006 4096 8 33387 40272 498591 296619 4096 16 50203 65941 764439 771372 4096 32 61322 103296 1046544 875237 4096 64 78099 114310 1641053 1319518 4096 128 89996 125279 1395058 1100793 4096 256 96836 141941 1695972 1592526 4096 512 88778 177599 1574718 1849922 8192 4 22091 22439 331914 383591 8192 8 32970 37925 700107 470347 8192 16 53898 58561 712092 903780 8192 32 73977 85795 1296407 1107778 8192 64 86333 116034 1299496 1066251 8192 128 98891 108868 1459210 1223950 8192 256 87084 127448 1689783 1653277 8192 512 85835 129109 1813197 1698219 16384 4 19381 20181 362091 373339 16384 8 32169 36138 625110 362574 16384 16 48199 58140 901064 858609 16384 32 64429 83475 1271269 1038077 16384 64 89399 119341 1499547 1272163 16384 128 98276 131303 1700101 1611816 16384 256 108185 155531 1713625 1670470 16384 512 121827 177765 2161206 1661986 32768 4 21216 24581 484018 461482 32768 8 37896 40605 767889 547849 32768 16 54926 57543 1199724 918262 32768 32 70654 93640 1420428 1253652 32768 64 91053 100857 1526356 1227815 32768 128 101197 124446 1730014 1512348 32768 256 98581 154145 2038584 1734140 32768 512 119653 170160 2322788 1957574 65536 4 19996 21605 408249 378853 65536 8