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 Sep 7 12:27:26 2026 Auto Mode Machine = Linux oleg408-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-oleg408-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 2253 6661 627470 546928 64 8 3923 13179 877797 633392 64 16 3726 44319 228688 818885 64 32 4404 49684 1232453 743988 64 64 3141 10656 673098 1638743 128 4 2398 4572 205476 378663 128 8 5890 8758 63998 584313 128 16 4929 22476 983630 819893 128 32 7365 22707 621518 962469 128 64 3526 65948 1114289 1065630 128 128 2747 24582 624409 1727352 256 4 3929 5485 477684 274979 256 8 7062 7795 271228 307679 256 16 5978 18485 1089202 1169901 256 32 11350 16176 24914 775933 256 64 9831 23157 1226004 1224606 256 128 10778 20424 684432 1570244 256 256 6340 55399 850282 1683493 512 4 5677 5535 553645 180085 512 8 6702 20106 133576 241404 512 16 6945 14589 548834 323425 512 32 12087 12302 246389 450318 512 64 19206 40554 840566 344821 512 128 6839 14861 548274 496550 512 256 12126 54404 630536 678122 512 512 15276 65456 1276891 872320 1024 4 4845 7722 569487 266539 1024 8 10682 10333 997019 327066 1024 16 16383 18750 234969 242259 1024 32 19128 21897 798795 514810 1024 64 15644 31737 247408 616490 1024 128 14766 49819 395237 1196434 1024 256 30251 32750 1521524 1200447 1024 512 31893 42198 819211 1635675 2048 4 5576 6857 186608 268336 2048 8 7789 7692 327525 277957 2048 16 12347 16951 406512 289918 2048 32 21282 28764 448729 348591 2048 64 26187 44737 525256 620399 2048 128 34596 43638 1016824 440152 2048 256 16195 24179 1377297 1215360 2048 512 15163 37243 758774 655579 4096 4 5849 7138 103069 172122 4096 8 9040 10256 301730 352741 4096 16 11330 13067 302154 335022 4096 32 20806 35578 654625 481191 4096 64 29552 24125 621630 446383 4096 128 15679 24861 736549 355280 4096 256 38139 42547 1162624 878010 4096 512 18997 62807 350775 402717 8192 4 1706 4208 269340 252933 8192 8 7473 15162 567668 317543 8192 16 14959 18736 374302 387790 8192 32 15939 23486 516720 665527 8192 64 30841 37948 440166 350145 8192 128 47884 54916 933896 629658 8192 256 38520 36876 773853 743913 8192 512 32632 35646 703663 640253 16384 4 5629 7232 272821 203690 16384 8 11396 9438 354418 393894 16384 16 15237 17093 420082 533823 16384 32 24361 23630 672831 503274 16384 64 24632 39773 876671 529214 16384 128 39689 38650 899730 481216 16384 256 23922 40754 954161 350220 16384 512 28137 33210 403338 464978 32768 4 6421 6168 380359 300689 32768 8 8681 9991 278935 476785 32768 16 12176 22853 719354 679637 32768 32 19490 28508 421861 686025 32768 64