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 10:35:58 2025 Auto Mode Machine = Linux oleg408-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-oleg408-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 3987 11777 727850 577521 64 8 6091 37670 752329 769584 64 16 8062 48117 952555 831569 64 32 6524 56730 1492919 987600 64 64 4740 86125 1087638 1638743 128 4 4852 18618 604036 508012 128 8 7093 34830 49061 748976 128 16 11536 45229 992724 310544 128 32 11255 77338 1557024 1082825 128 64 12942 41790 1346196 1306873 128 128 11037 106568 1642783 1749872 256 4 7712 18338 616807 414923 256 8 7278 27753 773140 632056 256 16 9527 21761 1153561 759469 256 32 12830 81916 1197295 856386 256 64 14132 43835 1549845 1347557 256 128 11328 106492 1581810 820398 256 256 18446 119626 1662639 2114473 512 4 6895 9115 594738 628138 512 8 19819 15974 864942 172519 512 16 26115 45225 318626 560144 512 32 34951 88214 1242896 991998 512 64 16567 27481 1394645 1089647 512 128 23691 112305 1068503 1368865 512 256 34822 99283 1580419 1471074 512 512 29143 140931 1968713 1476130 1024 4 14009 11049 577528 564844 1024 8 24567 31824 888894 806899 1024 16 28692 49616 1062372 521626 1024 32 36793 72609 956178 1023877 1024 64 43770 71895 858340 1265904 1024 128 36307 46417 1052480 1450607 1024 256 43624 99990 1670020 541486 1024 512 44896 60933 1587315 1841906 2048 4 10331 10184 250487 696850 2048 8 25324 18826 519820 318454 2048 16 32673 35318 1457698 1164293 2048 32 18277 79582 1383731 1173679 2048 64 32965 45751 1211077 1190103 2048 128 24748 33621 1490582 1376193 2048 256 66394 39185 416001 1305301 2048 512 42361 111997 1646273 1260296 4096 4 12601 9631 363958 573028 4096 8 14859 12171 792582 888914 4096 16 36057 22297 571351 456889 4096 32 18058 37960 522521 703291 4096 64 28314 61640 795629 900044 4096 128 58215 53696 1709642 1380485 4096 256 65193 88813 1252194 771096 4096 512 57346 100295 527705 549372 8192 4 8207 10100 404962 345710 8192 8 16156 18631 387165 357307 8192 16 24693 27838 962301 631417 8192 32 38866 44001 1462066 363038 8192 64 31984 48006 398596 607000 8192 128 42626 66664 1249726 1145904 8192 256 56544 49730 669287 897453 8192 512 35488 55235 716592 612169 16384 4 3685 11052 606051 499651 16384 8 16401 18790 656774 629306 16384 16 22167 34583 338128 434911 16384 32 30831 53270 1244403 949127 16384 64 43862 75316 1465615 956778 16384 128 55589 63471 769484 572167 16384 256 52535 79022 901312 893054 16384 512 60303 70242 1685424 1483811 32768 4 10713 11811 399829 369779 32768 8 21756 20601 446643 569105 32768 16 23976 23504 303421 514976 32768 32 27647 44186 692461 666814 32768 64 33413 49397 1303111 1143011 32768 128 38227 47133 964417 703326 32768 256 52561 64684 1374722 792645 32768 512 47480 73260 1517743 1010827 65536 4 9631 10956 306660 346681 65536 8 14729 18669 493441 402221 65536 16