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: Fri Jan 16 04:10:28 2026 Auto Mode Machine = Linux oleg215-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-oleg215-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 2684 5485 258906 217567 64 8 4105 14642 177677 323102 64 16 3778 29411 763021 457452 64 32 3642 38741 345563 111903 64 64 2148 33919 829001 426897 128 4 1439 4796 268864 220317 128 8 4116 9229 453896 180533 128 16 3113 19056 429563 249034 128 32 3075 34848 601330 927549 128 64 4979 37691 790905 921183 128 128 7237 67865 962469 1579934 256 4 3813 7908 78652 192779 256 8 3652 11158 140896 45608 256 16 8906 25728 541253 532133 256 32 2707 14529 603630 711178 256 64 4076 53187 880256 533455 256 128 9465 13364 1202660 879535 256 256 16690 65931 1497953 490560 512 4 1572 3199 55587 52985 512 8 3529 8633 89936 118850 512 16 15331 38078 277495 522399 512 32 17482 42952 267206 217978 512 64 24807 23195 189844 595232 512 128 5601 11214 149309 441341 512 256 21380 70444 439445 727268 512 512 12902 41180 1442420 1030064 1024 4 3395 4604 181239 62181 1024 8 3475 4465 363001 209063 1024 16 14869 25072 389043 355167 1024 32 9538 16120 834653 239476 1024 64 9517 37411 751813 257742 1024 128 24457 70786 260968 1005892 1024 256 34313 64715 1368780 739389 1024 512 34399 63991 998178 1535119 2048 4 10212 12660 148299 92498 2048 8 7459 7980 192427 141191 2048 16 8800 9349 132624 63834 2048 32 22071 27181 587313 430167 2048 64 13275 17975 334697 900619 2048 128 14112 24745 252149 1142156 2048 256 18189 27781 1557613 567486 2048 512 27487 62783 663018 541787 4096 4 3623 5356 78992 63204 4096 8 18771 6848 169053 101870 4096 16 9884 17026 293769 110946 4096 32 7438 38600 453356 739752 4096 64 924 20233 232054 801568 4096 128 29651 65208 239701 591393 4096 256 50742 41149 565205 962629 4096 512 28799 61159 632780 430920 8192 4 4492 5051 62611 148489 8192 8 14732 8491 403151 413864 8192 16 17197 19156 107412 629855 8192 32 18315 74409 744929 521488 8192 64 23478 46264 486462 747441 8192 128 34073 64427 926168 372653 8192 256 36095 63582 542338 916337 8192 512 38687 92610 652547 1351797 16384 4 5610 5771 151043 143313 16384 8 9423 10371 121550 123971 16384 16 12296 16374 324736 393636 16384 32 22254 17866 561944 372026 16384 64 19669 26911 263908 295202 16384 128 24622 31006 587387 402652 16384 256 25797 33885 653999 413164 16384 512 27978 47778 825599 747683 32768 4 6647 6963 94934 87925 32768 8 11733 10391 214644 93897 32768 16