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 Mar 7 12:59:36 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 12625 21535 261173 188798 64 8 16913 32669 346008 234481 64 16 22527 53199 718114 367817 64 32 20799 73831 1143223 651849 64 64 21985 124806 939223 1249666 128 4 15984 20068 193341 180048 128 8 18441 43300 275204 204849 128 16 30267 69788 370050 465708 128 32 31881 101741 656477 574312 128 64 28313 102401 847059 1471662 128 128 41438 173699 1152564 1967960 256 4 17384 25201 165782 172743 256 8 17894 37948 414283 369388 256 16 35723 60650 491458 439013 256 32 50128 107839 729045 891956 256 64 52128 141920 836374 1298662 256 128 60736 134523 1201314 1274008 256 256 70079 241084 1805197 2613746 512 4 21055 25279 175293 160802 512 8 32407 46314 258458 409293 512 16 41575 62000 764281 706221 512 32 57807 103349 820337 645703 512 64 76556 157638 1413929 857687 512 128 54847 159157 1667552 1138158 512 256 75706 210438 1336492 1472083 512 512 98613 227951 1684557 1954379 1024 4 17816 20312 194670 153474 1024 8 34118 32566 302615 267352 1024 16 57280 65061 529145 548750 1024 32 55513 125043 1211964 753528 1024 64 103601 144734 982648 1251882 1024 128 103969 198328 1703807 1442326 1024 256 90077 250059 1988589 1582636 1024 512 98687 144228 1519371 2043465 2048 4 20631 22421 196037 207959 2048 8 32823 40820 376754 259893 2048 16 49068 71543 711805 608102 2048 32 89931 123247 1168252 940764 2048 64 101427 131030 1329133 1146577 2048 128 110564 157779 1248753 1166349 2048 256 130081 238055 1952344 1903035 2048 512 125891 235755 1954120 2327387 4096 4 21454 23471 219377 214101 4096 8 35495 38376 325753 286972 4096 16 51957 64478 509458 707083 4096 32 75766 111138 992952 979925 4096 64 98298 113127 1426211 1247557 4096 128 110717 171145 1542759 1606224 4096 256 123455 162539 1854315 1739944 4096 512 131763 205984 1899838 1422668 8192 4 22489 23898 160068 191079 8192 8 37004 39462 335764 349011 8192 16 53989 56355 497838 413197 8192 32 74309 85063 891215 773766 8192 64 97692 128865 1205782 1090376 8192 128 110194 172397 1172615 1399593 8192 256 119416 184575 2002455 1594359 8192 512 121068 171186 1723864 1909637 16384 4 19680 22271 189511 195796 16384 8 35542 39833 321993 379796 16384 16 62011 75242 624246 568216 16384 32 86638 96893 1162887 987876 16384 64 110625 140711 1329330 1065008 16384 128 132717 178193 1501447 1485415 16384 256 136438 182459 1849395 1547568 16384 512 131077 198089 2183941 1666055 32768 4 21559 23622 187055 168841 32768 8 35730 38320 335226 297782 32768 16 57019 67166 622386 602097 32768 32 87645 108653 1083597 976317 32768 64 108491 128234 1461295 1145574 32768 128 114174 168176 1221735 1138769 32768 256 131306 207149 1852756 1791884 32768 512 147057 215324 2066850 1616172 65536 4 21911 22478 186579 199603 65536 8 34059 39794 246490 378093 65536 16 53915 60703 537175 559773 65536 32