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: Thu Apr 30 14:15:11 2026 Auto Mode Machine = Linux oleg232-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-oleg232-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 10522 17566 703068 998622 64 8 15693 29616 1013707 1066042 64 16 15724 58664 1119387 1017549 64 32 19346 79119 1204796 1049372 64 64 24557 93701 1562436 1255511 128 4 15223 21322 617941 561107 128 8 25181 32844 762811 673778 128 16 28520 68011 1852520 1827299 128 32 22237 93845 1424795 1455701 128 64 36611 144794 1406136 2027414 128 128 35954 175861 1152564 1778862 256 4 15497 21103 947860 721210 256 8 25309 37575 973645 876662 256 16 31718 77365 1437779 984356 256 32 46067 74941 1243036 1071806 256 64 41953 124034 1549845 1924938 256 128 63762 179261 1924938 1778290 256 256 49602 215143 1683493 3285566 512 4 17219 20084 797785 526756 512 8 28293 38302 990625 900108 512 16 34612 63334 973118 919375 512 32 66364 106201 1339827 1043072 512 64 64662 161978 1662389 1764853 512 128 46647 202138 1696534 1655979 512 256 66005 185498 1635797 1645826 512 512 76020 193122 1723770 2116152 1024 4 18777 21323 819211 644424 1024 8 29846 35807 1298041 1019744 1024 16 46176 55216 674058 1176766 1024 32 68568 94281 2082099 1584972 1024 64 78860 136643 1580306 1456510 1024 128 83142 182471 1517224 2333199 1024 256 94965 218342 1698417 1426043 1024 512 83886 194238 1587902 2391665 2048 4 19709 19874 865239 672780 2048 8 30352 34922 1332432 1159109 2048 16 44285 55250 1155212 1196235 2048 32 73095 87237 1616227 1057899 2048 64 85222 103115 1513696 1322992 2048 128 82891 128480 1594920 1861789 2048 256 108061 176657 2275596 1503891 2048 512 95701 171179 2102899 2140097 4096 4 19488 22352 894141 848899 4096 8 32365 38435 1260001 848564 4096 16 48580 56695 1391780 1230049 4096 32 68288 99073 1394605 1540407 4096 64 83196 125760 1571261 1379598 4096 128 95008 140114 2121022 1787929 4096 256 105141 170894 2499324 1745069 4096 512 125429 205169 2419425 2141112 8192 4 19743 21068 790809 771750 8192 8 31466 38860 1319153 1166761 8192 16 48884 56649 1357405 1035000 8192 32 69411 89331 1803584 1309900 8192 64 92227 118376 1256260 1320015 8192 128 91560 134292 1741073 1595322 8192 256 107462 169796 1816072 2123356 8192 512 121948 166004 2155728 1818764 16384 4 18157 20075 895498 853957 16384 8 31401 35556 1130165 974249 16384 16 54367 60661 1812375 1454817 16384 32 72045 95189 1652911 1295059 16384 64 92066 119543 2208365 1450548 16384 128 96556 114243 1877796 1685424 16384 256 110331 163525 1789998 1454294 16384 512 115703 176580 2120068 1691148 32768 4 18104 19776 915461 741659 32768 8 31297 34124 1114474 1106880 32768 16 43955 54647 1475968 1220455 32768 32 65493 83649 1864468 1412777 32768 64 73066 116321 1640282 1428429 32768 128 97093 130830 2004044 1442689 32768 256 103137 151579 2090714 1659894 32768 512 108331 164214 1669370 1380175 65536 4 17404 19142 801898 781623 65536 8 29880 33252 1030277 1085050 65536 16