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 Aug 12 09:42:28 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 9469 21563 1163036 998622 64 8 15838 40531 799377 955947 64 16 24205 49265 926260 998622 64 32 21347 93832 1421755 916769 64 64 25858 90662 2689580 2923952 128 4 14408 24155 927549 1130717 128 8 23912 36477 1642783 934004 128 16 31573 66454 1332828 955616 128 32 38095 90021 1561553 2140585 128 64 22240 105624 1436229 1802755 128 128 46563 195097 1377278 2660335 256 4 15956 26317 965763 828628 256 8 28122 43657 1497953 1487577 256 16 47679 80557 1642294 1570244 256 32 60134 78888 1938842 2210228 256 64 53489 163685 1306564 1897721 256 128 59244 216794 1662639 1970871 256 256 83198 221490 2880164 2719671 512 4 21401 19600 730484 582478 512 8 30951 51261 1434711 906185 512 16 57418 64941 1475116 1143004 512 32 44595 86227 1305615 1051757 512 64 98500 165384 2265742 1616100 512 128 59652 199602 2256220 2449212 512 256 114827 170613 1729323 2449212 512 512 110343 284593 3051245 2244430 1024 4 19172 23266 1141730 1023877 1024 8 35198 41142 1499217 1365299 1024 16 58327 80218 1706515 1095429 1024 32 76778 93738 2120127 1741810 1024 64 108659 123985 2360124 2211841 1024 128 107879 135126 1597351 1983996 1024 256 133575 181048 2715230 2461573 1024 512 111569 243702 2960401 2612819 2048 4 21015 27425 1005870 819509 2048 8 40001 48118 1597293 825177 2048 16 64028 73801 1741389 1806199 2048 32 72994 97034 2500122 1982533 2048 64 101016 116272 2309242 1621413 2048 128 98484 151266 2206617 1397918 2048 256 87431 193276 1865023 1564421 2048 512 135422 224217 2625441 2516234 4096 4 22282 21654 995830 666563 4096 8 32844 39698 982054 1423139 4096 16 55540 67141 1266129 1070276 4096 32 84229 79407 1538201 1417386 4096 64 106844 146968 2143249 1356290 4096 128 124843 163747 2239643 1894600 4096 256 111707 132044 2292236 2116840 4096 512 126431 152364 2234400 2112416 8192 4 19927 22317 954442 758228 8192 8 34422 33554 1541638 1363492 8192 16 54427 68905 1357190 1297876 8192 32 71922 95996 1369906 1595914 8192 64 101430 149803 2144560 2116294 8192 128 115529 153872 2209230 1835965 8192 256 118609 183254 2351988 2130597 8192 512 117594 164604 1917202 1533245 16384 4 20017 22550 685004 614758 16384 8 33653 38089 1103753 1086820 16384 16 52816 59642 1607367 1272941 16384 32 74431 89567 1943544 1557741 16384 64 95900 140343 2187695 1872883 16384 128 109476 152758 2044686 1430797 16384 256 121900 164496 1832871 2109719 16384 512 133099 176992 2422531 1759790 32768 4 18921 21596 709370 720523 32768 8 33383 38308 1364824 1186088 32768 16 58574 70697 1363863 1682387 32768 32 79189 103711 1591229 1780278 32768 64 105458 136278 2295975 1964401 32768 128 137028 171760 2110944 2062570 32768 256 148157 186941 2669920 2113378 32768 512 142840 204431 1473974 2216907 65536 4 20900 23050 1141724 948915 65536 8 33937 40948 1394591 1425872 65536 16 53500 62391 1401210 1192214 65536 32 80449 95887 2515588 1758084 65536 64 101566 129301 2287717 1449878 65536 128 114935 143058 1820747 1803355 65536 256