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 31 22:13:15 2025 Auto Mode Machine = Linux oleg445-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-oleg445-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 12598 24177 265565 342477 64 8 16922 39651 852702 418250 64 16 19790 62502 561808 599446 64 32 24709 101764 831569 1363961 64 64 24971 81944 1734015 1304314 128 4 14939 23218 538051 364770 128 8 22654 38195 609522 640042 128 16 27355 65037 670413 710329 128 32 33437 84323 1306873 1294270 128 64 34583 111504 1504659 1175271 128 128 40089 137772 1663139 1663139 256 4 16848 22193 281319 380381 256 8 28015 40093 582035 778183 256 16 26921 58649 659625 787890 256 32 43177 77785 1248819 873809 256 64 46937 109915 1058076 1102624 256 128 56498 127692 1325925 1506359 256 256 48649 118569 1036624 1956506 512 4 19339 22381 415630 332437 512 8 30066 40213 598050 560729 512 16 44798 62852 1009722 986529 512 32 61170 89778 1842059 1410215 512 64 74964 97335 1302447 1305615 512 128 68066 146029 1347393 1770674 512 256 72051 165384 1975959 1848401 512 512 84670 158324 2099600 1975959 1024 4 21030 23861 356938 300814 1024 8 33493 43190 528363 616136 1024 16 52531 72793 902909 660174 1024 32 72159 100361 1623311 1186518 1024 64 86223 127587 1546729 885048 1024 128 100491 139091 1326505 1888889 1024 256 89439 181976 1741810 1391395 1024 512 93150 128808 2321847 1641301 2048 4 19910 23601 454691 307455 2048 8 35933 41092 595373 586151 2048 16 47052 61997 878962 797816 2048 32 69198 97981 1460921 1002348 2048 64 86647 130296 1975239 1677457 2048 128 101215 117411 1908532 1685687 2048 256 113141 156397 1629101 1463909 2048 512 116298 181222 2176427 2054120 4096 4 22117 24640 405263 417708 4096 8 36839 39900 643734 550023 4096 16 55933 64200 1126563 972272 4096 32 80653 93428 1483605 1040396 4096 64 86373 111017 1264173 1312461 4096 128 104468 125571 1578334 1523739 4096 256 86406 140717 2278253 2050885 4096 512 121922 155529 1770243 1674646 8192 4 20282 20881 358355 359645 8192 8 33448 37224 546930 479397 8192 16 52594 61658 861128 829488 8192 32 65124 90440 1178689 1036968 8192 64 86085 110505 1376768 1271838 8192 128 87158 118407 1617704 1319356 8192 256 96037 155146 1788283 1794166 8192 512 101923 137131 1716973 1618314 16384 4 18356 22051 421703 336627 16384 8 35221 38924 597390 489511 16384 16 50855 60877 901253 829406 16384 32 71707 84471 1082591 1254696 16384 64 82998 109704 1543640 1379111 16384 128 91914 133155 1933918 1548126 16384 256 103205 143996 1894988 1666419 16384 512 97226 150973 2360779 2034034 32768 4 20841 22311 357073 361116 32768 8 35710 40155 635418 626109 32768 16 53631 63452 878547 940610 32768 32 70210 84460 1357692 1182699 32768 64 92919 113802 1714711 1519790 32768 128 102964 129222 1652867 1515016 32768 256 100725 137530 1826023 1511101 32768 512 107652 146575 2085004 1864696 65536 4 20586 20992 378825 342045 65536 8 33123 38095 630621 609335 65536 16 55216 63771 933882 799412 65536 32 71356 89444 1362692 1170850 65536 64