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 May 13 02:14:19 2026 Auto Mode Machine = Linux oleg414-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-oleg414-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 5367 17607 645579 592827 64 8 9586 26163 877797 503814 64 16 12818 61726 1879725 1526887 64 32 10648 60955 1143223 1210227 64 64 10979 73729 852702 1722886 128 4 10183 17713 606767 730629 128 8 12491 29283 1440082 889145 128 16 17832 51757 1111981 1303699 128 32 17190 66355 1852520 1093856 128 64 26240 105107 1778862 1346196 128 128 21541 81792 1349580 2238774 256 4 14832 18258 615393 652807 256 8 18950 29969 744204 719277 256 16 25058 45904 1339154 1293967 256 32 24563 66527 1415041 716876 256 64 38959 87553 1514860 1274008 256 128 27589 97269 844929 1591186 256 256 21241 134439 1715775 2613746 512 4 12934 17670 618371 713021 512 8 24132 30441 922535 750656 512 16 36589 54261 1155924 994294 512 32 32898 69338 1422357 1684557 512 64 41065 96638 1842059 1091863 512 128 49961 148791 1689859 2065273 512 256 51296 119319 1772135 2047551 512 512 65514 163832 2678309 2548017 1024 4 16259 20490 915223 586519 1024 8 25042 30403 1208894 1151834 1024 16 41487 55586 1186518 1016847 1024 32 45343 78001 1408737 1105865 1024 64 57801 117864 1718120 1284839 1024 128 58178 116099 1651398 1395010 1024 256 69179 129754 1630707 1393200 1024 512 76343 154568 2443368 1551758 2048 4 16200 17954 986124 750487 2048 8 25468 30369 1098203 1048089 2048 16 37086 51770 1447382 1001881 2048 32 50679 80667 1264935 1087635 2048 64 56101 105719 1500476 1651654 2048 128 66096 132548 1636862 1470172 2048 256 78615 116126 1830447 1379287 2048 512 86839 136669 1732608 1515833 4096 4 15711 17137 718468 667858 4096 8 24475 29924 978976 798105 4096 16 40740 51008 1460276 1072280 4096 32 62244 73004 1502550 1428227 4096 64 70602 107605 1398009 1236334 4096 128 76206 113544 1360802 912037 4096 256 81876 113525 1767693 1583864 4096 512 81171 147089 2308872 1334171 8192 4 16151 17519 827211 696841 8192 8 27166 29482 1113341 944083 8192 16 40018 47639 1307408 1259345 8192 32 54049 75772 1607562 1271461 8192 64 66506 93199 1185521 1717402 8192 128 72536 106839 1672185 1387050 8192 256 66297 103671 1156589 1216540 8192 512 78137 91936 1333540 1027848 16384 4 14434 16091 746425 668875 16384 8 26284 27678 873995 811693 16384 16 38616 41674 730647 669722 16384 32 40551 61333 1381079 1159767 16384 64 60267 81560 1136821 857623 16384 128 69461 106831 1381218 1437050 16384 256 65371 112613 1229552 1531223 16384 512 76484 122444 1859504 1705968 32768 4