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 Aug 17 00:14:38 2026 Auto Mode Machine = Linux oleg306-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-oleg306-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 10402 15358 495445 763021 64 8 13338 38719 901377 1002351 64 16 13321 56089 901377 1083249 64 32 16705 87557 1210227 1168097 64 64 15955 108117 2689580 2892445 128 4 11905 19274 684954 646983 128 8 18691 36056 1598754 969421 128 16 25822 49327 1254941 1032829 128 32 24940 84762 1975201 2066432 128 64 27397 99534 1858934 2843510 128 128 27479 95651 1939522 2202044 256 4 16075 19010 1031644 764334 256 8 23245 36296 897923 737558 256 16 22814 57644 1142514 1058076 256 32 41524 96639 1319408 1093639 256 64 41579 117312 1686137 1911233 256 128 49939 166994 1662639 1610276 256 256 28060 143188 1911233 1790149 512 4 13975 18606 1115109 982917 512 8 24229 32164 1135150 835010 512 16 29198 54007 1380303 957072 512 32 45620 92052 2107844 1509330 512 64 62607 117865 2114069 1467055 512 128 61700 124090 1395552 1426135 512 256 69527 188032 1701913 2039772 512 512 85690 189208 1999881 3580298 1024 4 19963 21041 919928 603072 1024 8 27515 37430 991266 1187831 1024 16 44158 56958 1841116 1695735 1024 32 55104 88100 2115949 1848247 1024 64 74815 121571 2281152 1288307 1024 128 84909 159026 1806273 1711956 1024 256 98955 160500 1924436 2484355 1024 512 95300 152380 2129589 2398343 2048 4 18278 19644 909006 968337 2048 8 31479 38016 1191423 1098063 2048 16 53425 63333 1793378 995610 2048 32 53095 82667 1860176 1763917 2048 64 74319 91558 1566989 1739978 2048 128 72742 167318 2107025 1565562 2048 256 93610 186268 2394870 2248199 2048 512 108768 150944 1899669 2585923 4096 4 19037 20391 1025308 914075 4096 8 31500 33919 1030659 1161602 4096 16 52294 68381 1378712 1122514 4096 32 62846 94299 1383709 1884004 4096 64 97817 111702 2459958 1617110 4096 128 93222 152950 1749690 2223699 4096 256 105630 159862 2558505 2056285 4096 512 131594 165367 2056285 2022635 8192 4 19715 20916 872787 852264 8192 8 31909 35450 1399593 1338788 8192 16 49297 56258 1522106 1664086 8192 32 67094 90506 1891972 1547122 8192 64 90383 127000 2592443 1679705 8192 128 91565 132359 1697547 1436936 8192 256 120092 161951 2343805 2042814 8192 512 114788 154566 1909531 2146168 16384 4 19668 20307 921681 899919 16384 8 31152 32507 1399616 900615 16384 16 46022 54868 1695571 1097969 16384 32 65583 74361 1725198 1731544 16384 64 77570 112150 1835710 1433543 16384 128 100345 134395 2145887 1508236 16384 256 98317 125450 2370388 1944919 16384 512 108706 154263 2607672 1606278 32768 4 16915 18506 723082 600333 32768 8 27051 32188 1129383 1113156 32768 16 44312 49863 1561862 1571920 32768 32 66992 78818 1793661 1625961 32768 64 78992 96979 1808887 1346703 32768 128 83409 121807 1903354 1636259 32768 256 98464 139387 2350637 1732369 32768 512 99422 142738 2098214 1900590 65536 4 17197 19873 793608 679452 65536 8 30112 33436 1143638 1204681 65536 16 48191 56228 1497867 975862 65536 32 69651 87255 1669875 1878623 65536 64