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: Wed Sep 24 13:13:26 2025 Auto Mode Machine = Linux oleg129-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-oleg129-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 13394 18762 254006 236131 64 8 20265 36178 754443 408077 64 16 27233 66038 627470 627470 64 32 33719 86235 743988 561808 64 64 39628 95095 1310683 983980 128 4 16212 21776 378930 430942 128 8 32324 44366 597981 748976 128 16 43230 79409 962469 566435 128 32 41884 82636 652488 1217930 128 64 34289 116893 1254941 1093856 128 128 51180 119735 1294270 1504659 256 4 21031 21245 260439 326186 256 8 30203 35001 619655 356038 256 16 43783 62744 684869 565185 256 32 66511 99764 794889 1076103 256 64 64629 120580 999940 1132871 256 128 77365 196160 1463250 1445521 256 256 71071 194842 1413179 2305128 512 4 21582 23831 434994 242084 512 8 30750 41031 486317 469210 512 16 42177 66553 848872 594738 512 32 67984 98180 994294 844865 512 64 75504 137705 1225169 1209982 512 128 85790 155055 1510391 1426135 512 256 83700 205878 1207261 1635797 512 512 84700 170722 1610042 1505098 1024 4 17099 21252 248424 278030 1024 8 32000 34737 468688 412074 1024 16 51230 62412 1020714 588206 1024 32 57745 80566 925678 800731 1024 64 75907 120954 1126458 1186518 1024 128 82045 123671 1582636 1257748 1024 256 68397 146436 1954207 2331932 1024 512 105413 154613 1777861 1530742 2048 4 18755 20421 248574 253085 2048 8 28667 35115 477621 355811 2048 16 47241 58286 696398 667500 2048 32 69921 90232 1000947 843903 2048 64 64196 117342 1157703 1040094 2048 128 95902 146401 1060118 1291368 2048 256 83187 112010 1508115 1275264 2048 512 99495 127228 1748834 1528510 4096 4 19032 20971 301756 295548 4096 8 32932 37895 477009 499025 4096 16 52351 61456 737213 594648 4096 32 74263 86110 841745 847141 4096 64 85625 111592 1270061 878594 4096 128 79603 142518 1419260 1044381 4096 256 106282 135056 1826906 1569395 4096 512 105255 171558 2019781 1744537 8192 4 19528 21009 311910 284562 8192 8 31607 36980 584182 520359 8192 16 50341 58877 815529 667220 8192 32 67261 87920 971415 943979 8192 64 85262 107866 1486481 1312652 8192 128 95495 144490 1520961 1360576 8192 256 109896 136553 1655587 1403939 8192 512 106594 186096 1645675 1436695 16384 4 20514 22294 327377 311725 16384 8 33271 37847 561824 563044 16384 16 52357 57387 806142 745000 16384 32 65287 84031 871943 856639 16384 64 69733 106578 1074147 1068336 16384 128 85948 128073 1522673 1176425 16384 256 101069 139803 1778969 1214987 16384 512 101206 150285 2002152 1682659 32768 4 20837 21489 333103 298137 32768 8 34093 39842 501245 554440 32768 16 53539 60389 864543 677346 32768 32 69583 95372 1108040 1107442 32768 64 94703 122889 1328364 1202589 32768 128 107197 142217 1821135 1553565 32768 256 99990 149683 1589370 1428489 32768 512 107512 145919 1721369 1372882 65536 4