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: Tue Oct 7 09:19:04 2025 Auto Mode Machine = Linux oleg302-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-oleg302-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 16203 26734 647135 376589 64 8 28367 59207 555990 1255511 64 16 25346 78540 1679761 969761 64 32 28636 70868 1722886 1722886 64 64 35811 131148 1255511 1879725 128 4 22149 23067 621518 983630 128 8 37415 40101 646205 847059 128 16 35942 51757 1319723 1642783 128 32 50255 102323 1085013 962469 128 64 59095 116361 1040839 2132084 128 128 63081 163889 1162547 3124872 256 4 16052 31453 557844 948698 256 8 30538 51395 984356 886067 256 16 57800 106092 1561112 1763685 256 32 63618 90269 1924938 1842366 256 64 94288 177278 1479379 2533571 256 128 75340 257010 2285501 1763685 256 256 98230 203021 1523457 1897721 512 4 24539 32647 842214 912733 512 8 46766 55279 1049187 990168 512 16 68148 106777 1640796 1049187 512 32 86470 139213 1759070 1270846 512 64 120497 145742 1867692 1895721 512 128 59680 233148 1882427 2207515 512 256 63037 215571 2235086 2486072 512 512 108635 248183 2509312 2216629 1024 4 27761 31719 1034232 819211 1024 8 45269 60484 1314327 1147832 1024 16 72418 82661 1454537 1379773 1024 32 73284 146202 1289855 893517 1024 64 106080 148343 1720874 1673273 1024 128 136405 192955 2156318 1428415 1024 256 108142 237411 2250080 2060128 1024 512 115029 238413 2173780 2467229 2048 4 25486 27083 857637 701173 2048 8 35715 36904 1135813 1091089 2048 16 66377 76071 1636862 1169047 2048 32 86493 113961 1277540 1155678 2048 64 98680 153570 1553669 1635926 2048 128 90252 184587 1630338 1655474 2048 256 117917 235535 1919621 1941313 2048 512 123560 156371 2207184 2036105 4096 4 24979 28416 714464 731687 4096 8 43934 49095 1502024 1187947 4096 16 70150 81189 1440200 1137076 4096 32 81332 113352 1857723 1388069 4096 64 106716 144418 1953188 1077931 4096 128 122242 165280 2014807 1954299 4096 256 131754 162797 2133401 1763158 4096 512 135021 203314 2136851 1849125 8192 4 22425 26712 723548 889761 8192 8 40024 49188 1192764 948802 8192 16 68404 76478 1312201 1287083 8192 32 91346 123386 1847615 1025149 8192 64 103564 139154 1709881 1458900 8192 128 124070 122151 1427919 1186913 8192 256 133699 204207 2158708 1482441 8192 512 98925 207782 2121651 1795666 16384 4 21080 24404 824352 661764 16384 8 36808 45401 1239600 941778 16384 16 59539 70931 1533375 849355 16384 32 80633 113417 1322779 1441118 16384 64