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 Jun 1 13:20:52 2026 Auto Mode Machine = Linux oleg349-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-oleg349-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 2745 9589 710511 647135 64 8 2813 16579 983980 789967 64 16 3471 22121 674790 889431 64 32 3429 24297 1304314 760859 64 64 2900 71510 1066042 1330167 128 4 5423 7854 670413 630273 128 8 3489 15547 181817 780556 128 16 3858 42895 1105114 881842 128 32 3693 60555 1254941 370050 128 64 5126 44183 1243315 1424795 128 128 8576 87555 1440082 2035099 256 4 4611 3758 697322 519266 256 8 12843 15249 627623 408918 256 16 6144 34791 1032636 894929 256 32 6155 30742 1461259 1122215 256 64 10541 35188 1543163 191199 256 128 13075 52609 1662639 894929 256 256 11457 35859 768712 1103757 512 4 4412 12513 218133 532767 512 8 10633 10932 403752 774480 512 16 18047 26295 686358 725058 512 32 15036 38991 664895 250733 512 64 9994 41939 1038532 1354190 512 128 24830 58041 1515722 174922 512 256 19236 41650 966113 1614885 512 512 24975 68267 617659 1635797 1024 4 4926 5384 299075 604175 1024 8 9633 13218 973296 576907 1024 16 23308 31141 1088213 573671 1024 32 22439 63053 581831 547561 1024 64 24841 57879 148816 1230718 1024 128 22191 30765 558963 719087 1024 256 30948 36979 1256277 705735 1024 512 24375 43439 1597351 1723636 2048 4 5410 5095 301625 124249 2048 8 6796 7342 654082 851938 2048 16 12190 18148 1241354 1073365 2048 32 12200 23241 267917 314744 2048 64 30482 50398 929163 848069 2048 128 29469 52015 843158 852954 2048 256 44992 37908 647280 675001 2048 512 44431 55728 1143524 1558461 4096 4 6890 5492 313056 199337 4096 8 8438 11812 348032 464976 4096 16 19901 14776 326087 716221 4096 32 35418 38616 300185 766178 4096 64 43183 71617 1030659 795187 4096 128 60523 70544 595782 266078 4096 256 27137 46017 1747376 873724 4096 512 35978 65452 900610 1546787 8192 4 6506 12334 110193 427153 8192 8 16181 8408 497932 258398 8192 16 22178 23077 454934 525331 8192 32 40834 22258 716711 914605 8192 64 22982 3335 818541 523722 8192 128 23226 30510 804229 982385 8192 256 29571 46307 623681 1024232 8192 512 36065 44674 1275805 696545 16384 4 5298 6099 265504 207434 16384 8 9442 9698 454605 481485 16384 16 14905 17904 697010 302449 16384 32 18077 31068 815450 601226 16384 64 32583 33304 622369 505506 16384 128 26152 28878 480143 637183 16384 256 28178 40570 763322 598545 16384 512 23741 33838 1003368 579349 32768 4 5097 5493 566068 431124 32768 8 10987 13400 778780 718406 32768 16 19148 18070 542129 410292 32768 32 23836 38068 909819 921328 32768 64 36591 32710 1001188 848672 32768 128 33828 39621 954637 414780 32768 256 52017 40326 1164344 941989 32768 512 35437 55417 1117219 634093 65536 4