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 Sep 16 04:08:11 2026 Auto Mode Machine = Linux oleg446-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-oleg446-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 7857 18364 400168 394870 64 8 8161 30490 799377 653436 64 16 8308 39535 727850 889431 64 32 8558 54662 1002351 955947 64 64 9408 69045 886494 1562436 128 4 10185 18202 799146 481150 128 8 12624 28237 847059 659704 128 16 17467 59232 895074 621518 128 32 12504 67329 752124 953918 128 64 16473 65746 1306873 1196221 128 128 15726 98765 455436 2098744 256 4 14335 18880 481109 587127 256 8 18400 32536 817898 678807 256 16 16855 52534 1855098 937106 256 32 23109 66755 1089202 877379 256 64 27312 88857 1345868 914752 256 128 29486 103815 1147398 1180188 256 256 20007 106439 1237306 3197509 512 4 15743 18683 533429 693003 512 8 22265 31765 1264113 796306 512 16 25361 47792 1207940 1248678 512 32 44172 86575 1391032 885996 512 64 47939 95631 1895721 1848401 512 128 41090 107112 1417662 1051242 512 256 46423 129516 1426135 2124526 512 512 52735 130611 1778004 1835760 1024 4 15378 18460 675542 758586 1024 8 26499 36208 1168760 1032244 1024 16 29825 45527 1050164 949834 1024 32 48238 91552 1175477 1090700 1024 64 66693 121543 1668074 1171629 1024 128 62173 120669 1508167 1558516 1024 256 65615 139929 1458489 1422266 1024 512 76616 152472 2338280 1796451 2048 4 17381 18445 795304 708401 2048 8 25806 33793 1061166 953081 2048 16 43184 56716 1401796 1085848 2048 32 54232 82077 1195569 1326465 2048 64 59471 96677 1297807 855502 2048 128 74708 118703 1660915 1570427 2048 256 77370 115523 1703741 1610168 2048 512 77965 128918 1569280 1825390 4096 4 17351 20141 698260 773839 4096 8 26928 31754 917345 900610 4096 16 44021 52239 1200817 1171263 4096 32 60073 76600 794121 1069144 4096 64 65726 94499 1565819 1334275 4096 128 85288 129497 1967279 1641053 4096 256 88002 130632 1826129 1664263 4096 512 103093 139918 1799541 1603077 8192 4 17760 19672 753076 684377 8192 8 28206 33431 968567 779683 8192 16 43370 49460 1065391 1072943 8192 32 54404 68331 1549774 1113053 8192 64 62298 89939 1501487 1089685 8192 128 71221 121140 1845035 1275379 8192 256 83149 115578 1775439 1330493 8192 512 81987 129156 1897195 1593176 16384 4 16777 18297 714898 596063 16384 8 28901 32781 886773 850416 16384 16 43407 51364 1159767 987947 16384 32 58679 73216 1529927 1482979 16384 64 72208 97165 1584536 1224339 16384 128 73357 104386 1693982 1342838 16384 256 78370 107746 1771266 1638409 16384 512 96448 120212 1640051 1670145 32768 4 17006 18525 696169 603363 32768 8 27652 31091 927377 905795 32768 16 42270 48932 1279158 1069415 32768 32 54263 68145 1202011 1062134 32768 64