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: Sun Jan 11 09:11:46 2026 Auto Mode Machine = Linux oleg210-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-oleg210-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 9957 19686 250919 273409 64 8 13314 33967 710511 633392 64 16 15159 49310 551422 926260 64 32 15892 80302 1357066 1452528 64 64 16780 94692 743988 1828508 128 4 11434 16196 289604 203838 128 8 17135 29844 692017 659704 128 16 19756 62045 1142750 907174 128 32 26958 97634 1561553 795593 128 64 29032 112086 1406136 1022989 128 128 33056 135751 1939522 2367096 256 4 15618 22101 387240 380920 256 8 24434 30473 491233 496917 256 16 20969 60435 955451 797250 256 32 38794 94288 1570244 1312954 256 64 44076 120404 1384034 1855098 256 128 23400 125910 1117543 1168627 256 256 51109 174512 1439707 2081678 512 4 17638 22423 362640 328220 512 8 27135 41346 559560 587096 512 16 39983 65305 860437 851903 512 32 52508 93925 992456 812884 512 64 56343 138450 1842059 1835760 512 128 57709 107225 1293037 1218910 512 256 67332 170546 1497750 1650887 512 512 61236 179588 2216629 2265742 1024 4 17206 20545 277725 343053 1024 8 25657 35726 380664 357294 1024 16 37189 55655 571458 530255 1024 32 52172 77423 1214706 703308 1024 64 66557 115033 1594978 1229309 1024 128 65252 96440 1630707 1819280 1024 256 62618 160374 1329791 1503942 1024 512 98056 202403 2645000 2382379 2048 4 15972 21449 332365 380948 2048 8 31626 33633 688637 426303 2048 16 44371 57979 584118 916376 2048 32 58618 80772 1369829 921784 2048 64 69325 122306 1232272 1281734 2048 128 90683 149872 1671581 1176895 2048 256 103091 185304 1602657 1648801 2048 512 108896 162796 2240576 1762469 4096 4 20026 20122 387993 258796 4096 8 34626 36603 601561 572627 4096 16 51713 59638 830354 832003 4096 32 65892 86567 1094900 1046990 4096 64 78861 112797 1068080 1194805 4096 128 85914 108270 1562117 1120610 4096 256 87947 142826 2003061 1870466 4096 512 102322 179578 1926684 1636364 8192 4 19776 19750 229725 287871 8192 8 33620 34509 555238 587870 8192 16 47103 60155 713274 720680 8192 32 62939 98754 1004882 967040 8192 64 94786 118482 1630292 1350735 8192 128 109366 160730 1775072 1629906 8192 256 107842 141483 2061319 1524402 8192 512 95471 168168 2075514 1754587 16384 4 19839 22828 366164 361925 16384 8 33447 39707 640300 588655 16384 16 49637 58121 910773 816099 16384 32 71401 77656 1308398 1234301 16384 64 87505 105624 1424952 1313977 16384 128 95154 119172 1996103 1112131 16384 256 110545 142462 1978517 1322677 16384 512 110389 159892 1623314 1814816 32768 4 20304 22310 411922 324005 32768 8 34822 37420 588959 558570 32768 16 52430 63700 1023709 883279 32768 32 69451 84028 1242433 1317085 32768 64 89579 113859 1589757 1472126 32768 128 86488 150730 1917481 1266989 32768 256 93768 117250 2230507 1841831 32768 512 109022 155504 2094090 1878561 65536 4 19209 21742 345375 314587 65536 8 33123 39591 653993 562164 65536 16 52285 60064 957426 1048592 65536 32 75560 86623 1449848 1163820 65536 64