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 Jun 28 03:16:05 2026 Auto Mode Machine = Linux oleg308-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-oleg308-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 6929 16059 620221 587635 64 8 8113 27445 809014 743988 64 16 9180 44540 1722886 998622 64 32 12300 65715 1002351 1163036 64 64 7402 80615 1421755 1648808 128 4 9736 16227 576780 592699 128 8 13204 29025 766076 1266785 128 16 18000 40632 876086 1048974 128 32 13866 79151 609522 1000121 128 64 20744 95531 2035099 1471662 128 128 22563 128015 947186 1732927 256 4 9345 17787 755195 653204 256 8 17900 31601 1354356 1118707 256 16 23272 53577 1066483 1099237 256 32 31542 76077 1497953 1206714 256 64 36723 116624 1375171 1718521 256 128 33276 113421 1514860 1497953 256 256 38518 112471 1376935 3009318 512 4 14728 17479 666546 786680 512 8 24182 33990 1270846 687237 512 16 32875 45853 1174254 1261144 512 32 45154 67627 1700565 1125630 512 64 36959 103101 1672748 1496706 512 128 64444 132024 2099600 1506154 512 256 61039 142502 1625889 1546280 512 512 69321 139358 2416145 2237414 1024 4 17402 17607 701355 912695 1024 8 27166 30534 1291018 883409 1024 16 39449 57193 1689730 1140517 1024 32 41417 86166 1317957 2125373 1024 64 66337 111243 1508167 881958 1024 128 68509 145101 1750329 1179674 1024 256 66097 142501 2146618 1753186 1024 512 82487 157343 2069060 2276316 2048 4 15138 18936 809164 607156 2048 8 25623 32545 1388428 834557 2048 16 36354 55790 1872340 1229979 2048 32 63535 79061 1415424 1284033 2048 64 75012 130312 1615315 1992189 2048 128 90523 129050 1923059 1433135 2048 256 92544 165401 1785550 1561009 2048 512 92028 148728 2432853 1613798 4096 4 16009 17650 702227 708658 4096 8 27827 31104 1121269 958815 4096 16 41772 50281 1212171 1254572 4096 32 57464 74646 1332929 1420198 4096 64 71363 92221 1559848 1401316 4096 128 79918 115111 2251678 1813981 4096 256 77695 163565 2022635 1536412 4096 512 94031 148772 1849125 1790911 8192 4 16854 17867 878500 769193 8192 8 27928 32789 1186012 962193 8192 16 43109 49144 1323013 1206120 8192 32 60373 68192 1042632 1207010 8192 64 66539 100428 1572901 1240477 8192 128 75585 115348 1767039 1614891 8192 256 90977 140115 1610426 1498148 8192 512 89201 118155 1855497 1435915 16384 4 15404 16817 774288 745776 16384 8 25577 32665 944963 1048723 16384 16 43535 49368 1507541 1102850 16384 32 60076 75515 1615909 1392130 16384 64 71390 92049 1319351 1423211 16384 128 79237 104487 1823097 1489213 16384 256 90767 113785 1762860 1324156 16384 512 85112 116820 1844629 1598915 32768 4 16243 16732 762098 682754 32768 8 26319 29528 985537 892983 32768 16 41213 48843 1066014 1009832 32768 32 59797 69503 1606424 1277648 32768 64 70806 91894 1697221 1479368 32768 128 82505 108237 1590824 1411863 32768 256 90804 118578 1786991 1493255 32768 512 98173 135536 2040097 1691248 65536 4