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: Mon Jun 30 17:37:50 2025 Auto Mode Machine = Linux oleg260-client.virtnet 3.10.0-7.9-debug #1 SMP Sat Mar 26 23:2 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-oleg260-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 21702 28880 615952 1101022 64 8 30738 56682 916769 874936 64 16 36095 72475 1143223 1562436 64 32 45942 104579 1599680 1357066 64 64 47378 188798 2133730 2379626 128 4 23464 34943 707520 826202 128 8 40491 64809 921183 940549 128 16 57169 72074 1642783 1000121 128 32 59310 116893 1359835 1391557 128 64 72395 177783 2132084 1363288 128 128 73055 242400 2367096 1440082 256 4 28296 31515 609801 802614 256 8 43939 66511 805021 1158540 256 16 63558 95982 1040643 1540948 256 32 95453 152937 1112909 1361224 256 64 81997 139522 1384034 1213534 256 128 118138 227931 2135500 1718521 256 256 113421 241463 1561112 1598292 512 4 30344 39430 682649 817837 512 8 47989 54560 1115688 996139 512 16 76589 133261 1340664 1590957 512 32 101546 142938 1413929 2089386 512 64 117671 181808 1599251 2132967 512 128 129649 250120 1501940 1524329 512 256 136462 241512 2097550 2047551 512 512 126831 322212 1753325 2150051 1024 4 26952 35438 915028 865605 1024 8 65143 58258 1040748 915028 1024 16 65264 98375 1336827 1535119 1024 32 104234 162486 1430318 1515083 1024 64 154446 188542 1819280 1851434 1024 128 193975 260825 1925298 1855433 1024 256 172566 289188 1793451 2039583 1024 512 178734 329171 1838751 1827796 2048 4 31122 36017 872978 816937 2048 8 53706 58306 994573 1082973 2048 16 86953 95673 1646273 1519319 2048 32 106765 150155 1674514 1850160 2048 64 159501 202871 1418462 1568420 2048 128 165560 208529 1555075 1695335 2048 256 191189 250065 1732608 1955900 2048 512 192427 235535 1910655 1892971 4096 4 31849 31963 682667 792107 4096 8 48694 56504 1124645 1056260 4096 16 83793 93006 1554485 1393700 4096 32 111039 127896 1567534 1724746 4096 64 140360 176611 1311159 1555048 4096 128 168613 203618 1652259 1431678 4096 256 167108 234849 1733448 1615741 4096 512 154776 244508 1809968 1821096 8192 4 29517 30757 727147 829568 8192 8 51950 56936 1184499 1163128 8192 16 83311 96849 1507812 1332040 8192 32 122925 141126 1447895 1540118 8192 64 145586 187756 1550053 1745229 8192 128 170279 197440 1517870 1488929 8192 256 181817 241828 1705637 1664328 8192 512 205014 233064 1614815 1804436 16384 4 32205 34160 868439 908954 16384 8 55662 62357 1153460 1280985 16384 16 82118 95352 1441874 1175660 16384 32 122217 139263 1372089 1207176 16384 64 142827 193900 1578096 1651283 16384 128 169541 225488 1853785 1731937 16384 256 188438 241527 1792566 1767257 16384 512 191024 266354 1603467 1517428 32768 4 29501 32187 870633 882281 32768 8 53890 59425 1357692 1159520 32768 16 87128 99215 1325187 1328633 32768 32 119551 148337 1531783 1533509 32768 64 151623 186961 1522889 1499053 32768 128 171931 223799 1708360 1699866 32768 256 192337 261905 1674842 1765051 32768 512 202197 270742 1742804 1771535 65536 4 30980 31756 886183 886074 65536 8