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 09:21:27 2025 Auto Mode Machine = Linux oleg451-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-oleg451-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 9086 21806 566551 450541 64 8 7022 35512 913649 752329 64 16 8735 24757 1002351 627470 64 32 7795 80810 528618 1049372 64 64 14260 101418 1421755 1780008 128 4 10732 12572 630273 574312 128 8 11638 33561 992724 883293 128 16 8546 58160 715059 881842 128 32 22562 83393 1142750 756363 128 64 20106 112391 1455701 1266785 128 128 10592 146254 1543594 2098744 256 4 15185 21536 537999 513063 256 8 19573 41471 992545 1008392 256 16 12837 53905 891956 861885 256 32 39299 90973 1514860 1148625 256 64 42015 120810 1312954 1235882 256 128 37311 137398 1610276 1053922 256 256 26356 132302 1629830 2118645 512 4 6156 14633 575917 568296 512 8 8035 12422 767559 671129 512 16 26449 40609 924123 824748 512 32 32232 43463 639169 855978 512 64 57541 108723 1497750 1094088 512 128 54935 120897 1652157 339748 512 256 54572 146999 1434711 1616100 512 512 12892 73947 900108 2099600 1024 4 8114 10638 577917 534412 1024 8 28687 39512 181722 612795 1024 16 26967 63382 991266 849848 1024 32 55229 77723 1049394 997251 1024 64 56555 118368 913471 1084914 1024 128 37882 90179 1329791 1276817 1024 256 28046 121950 1554004 1296474 1024 512 62760 83976 1594978 1568189 2048 4 7699 12260 578220 550255 2048 8 22217 23464 180488 771379 2048 16 16957 28952 979824 917551 2048 32 27162 27542 1011913 1006813 2048 64 27633 78234 1265868 970087 2048 128 41750 65279 1471180 1400653 2048 256 49784 127561 1660915 1503627 2048 512 78209 97858 1713598 1566989 4096 4 14633 15501 652041 383737 4096 8 24556 25731 929002 774153 4096 16 33947 36156 1036129 447651 4096 32 34439 66971 871640 804082 4096 64 47867 47654 1235623 786955 4096 128 68017 120883 1403262 1122808 4096 256 74033 97335 1689633 1488361 4096 512 78617 95317 1008871 1054833 8192 4 13995 13650 258144 524794 8192 8 17360 23281 429218 714639 8192 16 31342 45301 765611 1027080 8192 32 48029 38868 469236 781972 8192 64 37818 50436 552471 704514 8192 128 56875 102362 1421950 1025271 8192 256 56097 55910 1135566 618728 8192 512 46193 82865 1273441 1078297 16384 4 13102 15151 261955 227476 16384 8 15224 16950 251574 357487 16384 16 24050 33087 430762 407746 16384 32 29749 55205 536406 717593 16384 64 57258 69654 1407067 1304970 16384 128 59036 97667 651142 1090598 16384 256 50039 70315 888654 1007442 16384 512 70898 93883 1519306 1309770 32768 4 11161 10740 328774 534030 32768 8 14872 15168 792590 278826 32768 16 22742 28388 1122273 928479 32768 32 31464 49056 542936 773524 32768 64 44919 55974 1188457 853002 32768 128 45979 62099 638725 1071341 32768 256 52832 76705 485530 556492 32768 512 52513 71664 1533800 1128335 65536 4 7979 10925 407253 329978 65536 8