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: Wed Jul 15 09:34:21 2026 Auto Mode Machine = Linux oleg132-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-oleg132-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 7531 16464 537079 561808 64 8 9337 29411 323102 1101022 64 16 13521 47791 818885 1385075 64 32 7866 83344 1204796 1210227 64 64 14206 91310 1049372 1734015 128 4 10839 18626 653282 595328 128 8 16291 33161 1406136 824932 128 16 23096 51238 1557024 1040839 128 32 20285 81680 1278855 1142750 128 64 19141 90660 1526043 1618028 128 128 23974 124888 1911894 2066432 256 4 8627 15696 635423 567575 256 8 15312 31426 1280084 699594 256 16 24757 52383 1463250 1084800 256 32 28187 68967 1031644 1274008 256 64 39089 116942 1354356 1391207 256 128 36127 140270 2170027 2000242 256 256 45650 141826 1790149 3169196 512 4 13515 18240 1098566 606667 512 8 24724 29836 1234323 1391032 512 16 32497 47930 1086890 1093531 512 32 44348 69403 1614885 1630828 512 64 47557 110156 1312798 1132755 512 128 46448 143262 1895721 1475116 512 256 62287 166499 1797349 1705969 512 512 55889 152793 1492545 2768068 1024 4 16087 18660 877454 792604 1024 8 24105 27787 942952 980853 1024 16 32541 48242 1233900 1242826 1024 32 43206 76349 2133821 1352828 1024 64 55396 85333 1537317 1464956 1024 128 55192 111790 1793451 1267398 1024 256 58301 127142 1852232 1872419 1024 512 79024 144753 2089189 1336827 2048 4 15349 18083 820134 621162 2048 8 24502 29867 1291368 1108835 2048 16 35533 51837 1301938 952552 2048 32 53991 78320 1651654 1095821 2048 64 60434 99499 1511565 1282308 2048 128 64100 150611 1657071 1316907 2048 256 79555 127364 1504681 1355348 2048 512 73062 118895 1577928 1388652 4096 4 15593 16867 823153 768199 4096 8 26665 30371 1008871 945933 4096 16 44567 52939 1604424 1126858 4096 32 58461 69361 1673178 1440683 4096 64 76596 100330 1620160 1737831 4096 128 84271 126376 1840015 1412376 4096 256 60242 145413 2009857 1849125 4096 512 93048 135664 2230918 1765513 8192 4 15854 17339 783935 733589 8192 8 26956 30277 1011866 822656 8192 16 41590 50016 1313254 1172815 8192 32 59620 75831 1684234 1598439 8192 64 70888 106246 1932080 1415798 8192 128 85349 111900 1750118 1784754 8192 256 93659 120332 1799711 1542468 8192 512 85860 119107 1946307 1537568 16384 4 16263 17862 836860 651555 16384 8 27981 32978 1097898 1023421 16384 16 45754 53305 1402501 1505328 16384 32 67269 76007 1441723 1478035 16384 64 83911 106315 2152676 1540007 16384 128 96240 118998 2260746 1469784 16384 256 97422 121308 1698882 1648787 16384 512 97930 138632 2016250 1662991 32768 4 17297 17858 781325 681714 32768 8 29361 31663 1327709 1010700 32768 16 44838 51753 1398431 1254613 32768 32 63668 76152 1402913 1246546 32768 64 72119 89830 1930924 1601482 32768 128 96517 117977 1788665 1560373 32768 256 96217 115857 2097702 1744374 32768 512 103712 143740 2464883 1616818 65536 4