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 Jul 8 09:29:11 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 7701 15447 842003 507625 64 8 9159 24465 695778 695778 64 16 12227 44261 1279447 520419 64 32 12286 54374 1255511 1083249 64 64 13032 74157 1330167 1734015 128 4 11424 18107 1121270 482881 128 8 12988 24946 864797 785122 128 16 15065 39191 1231904 1391557 128 32 17192 61689 1022989 1007629 128 64 13178 93096 1521718 1306873 128 128 19984 92344 1436229 2132084 256 4 12631 15805 581719 1084800 256 8 17270 28119 740100 812944 256 16 28033 54842 988889 1016025 256 32 39096 65321 1023775 1048775 256 64 39481 104360 1089202 1826695 256 128 32335 141359 1523457 1629830 256 256 35535 137857 1755037 2000242 512 4 14208 19228 1014013 685482 512 8 22177 31189 866338 696374 512 16 34855 54653 1875849 1032044 512 32 57199 70407 1171691 922535 512 64 51560 90619 1207940 1218910 512 128 43824 115519 1667552 1422357 512 256 63514 162137 1797349 1747618 512 512 44103 119067 1789859 1910902 1024 4 15272 14897 1033237 601636 1024 8 29311 29018 1470977 1289467 1024 16 40262 41318 1250425 1416636 1024 32 60316 67501 1149061 1121458 1024 64 49708 125831 1343518 1848247 1024 128 70195 100097 1668074 1512948 1024 256 69184 126048 1899750 1452570 1024 512 74809 152586 2419964 1697745 2048 4 16420 17344 972833 816626 2048 8 27944 32417 945944 1127168 2048 16 43880 61530 1300164 1292145 2048 32 52656 74283 1361578 1109981 2048 64 72214 100112 1460673 1673209 2048 128 83714 146621 1761024 1640927 2048 256 88158 172812 1861789 1809243 2048 512 93876 151357 2565840 2364545 4096 4 16289 19001 1041721 725323 4096 8 29964 32864 1127450 1016872 4096 16 46947 56499 1234824 1320532 4096 32 57162 73034 1635118 1172622 4096 64 85622 84018 2427973 1355862 4096 128 81595 123047 2105942 1496529 4096 256 95734 132458 2124432 1791658 4096 512 87334 150120 2104910 1719567 8192 4 16715 17207 833613 673630 8192 8 29435 33804 1301761 1113197 8192 16 47608 52229 1554190 1051341 8192 32 65851 70115 1568450 1694283 8192 64 85010 103934 1944875 1487575 8192 128 94233 111221 1932080 1591922 8192 256 113763 138217 2314752 2045489 8192 512 91962 147592 2307601 1888851 16384 4 18397 18802 1137931 1065636 16384 8 31905 34246 1463492 1213357 16384 16 51301 56097 2006829 1164957 16384 32 73253 87084 1789811 1563945 16384 64 95491 107067 2271432 1860309 16384 128 88483 121343 2335585 1546836 16384 256 104654 138004 1823484 1954211 16384 512 119390 145044 2122818 2239746 32768 4 17730 18104 809508 737025 32768 8 30552 33853 1219232 1111194 32768 16 49707 53882 1278646 1091133 32768 32 64320 85244 1823068 1415279 32768 64 88439 103846 2088839 1683355 32768 128 94972 118706 1692476 1969242 32768 256 100217 133744 1753521 1641850 32768 512 108676 145038 2555586 1789714 65536 4