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: Thu Mar 5 19:49:07 2026 Auto Mode Machine = Linux oleg316-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-oleg316-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 9345 14759 193285 167061 64 8 15639 37846 235303 244297 64 16 23703 59934 621657 743988 64 32 22362 99060 1087638 998622 64 64 27887 143486 969761 1780008 128 4 16062 24023 206107 191274 128 8 26358 31067 359398 223714 128 16 31434 70254 474349 681476 128 32 41489 78434 1059322 1165070 128 64 37123 136302 927549 1543594 128 128 24893 175573 1017175 1254941 256 4 18305 19536 165170 102771 256 8 23550 43112 379842 262541 256 16 44199 72890 498069 458118 256 32 56563 124034 782721 921029 256 64 62576 113722 1325925 1248819 256 128 55606 174739 1076103 1826695 256 256 70019 166450 1855098 1970871 512 4 19408 23894 178469 194821 512 8 27046 34956 338196 341803 512 16 32785 47949 540681 414267 512 32 62514 100684 885996 782951 512 64 51815 133055 1112797 795127 512 128 91804 148925 1361920 1108203 512 256 86561 195335 2016784 1566585 512 512 72457 158359 2244430 2285029 1024 4 21078 22965 188022 169897 1024 8 34975 30852 246627 345121 1024 16 44311 54906 415743 500706 1024 32 66484 107927 1007072 570092 1024 64 74984 100736 952573 1004011 1024 128 88314 136696 1450117 1239598 1024 256 83907 168808 2048338 1684429 1024 512 114977 224118 2107643 1615374 2048 4 20477 23027 149250 214679 2048 8 29938 35170 251257 312624 2048 16 55137 76283 510976 405955 2048 32 74245 97140 934215 637812 2048 64 95687 119348 1466909 1224892 2048 128 99447 174550 1251847 1050267 2048 256 101306 182075 1651654 1495773 2048 512 126419 237725 2150814 2045804 4096 4 19820 21489 175710 131113 4096 8 34244 37425 376299 313170 4096 16 54298 59991 586467 515481 4096 32 63537 95202 739084 686897 4096 64 75663 130524 1050512 906598 4096 128 96836 145310 1146027 1080508 4096 256 99497 162377 1576596 1237849 4096 512 96827 163193 1661045 1436707 8192 4 18096 22496 202246 175334 8192 8 34385 36331 417003 328126 8192 16 53918 67839 565864 667272 8192 32 85407 104319 976411 813425 8192 64 101790 126472 1024263 1091415 8192 128 103830 156389 1278987 1225610 8192 256 104448 138381 1748604 1305123 8192 512 110794 189161 2148449 1679705 16384 4 19137 20728 174487 162908 16384 8 32611 37920 347015 285893 16384 16 53700 56428 515092 440453 16384 32 75240 95190 828686 838320 16384 64 93726 124993 1219212 1076537 16384 128 104645 156820 1381440 1243863 16384 256 110072 171056 1855086 1457625 16384 512 116514 173723 2131907 1735042 32768 4 19323 21369 198960 168538 32768 8 32615 35279 338999 336326 32768 16 54782 63447 657927 568376 32768 32 78717 90866 942422 778193 32768 64 97640 128872 1117328 975853 32768 128 112632 143546 1560090 1444736 32768 256 120136 174735 1962746 1695190 32768 512 118479 179448 1852157 1329327 65536 4 19524 21619 206220 191140 65536 8 34389 39566 348771 307039 65536 16