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 12:26:22 2026 Auto Mode Machine = Linux oleg147-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-oleg147-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 2898 6703 66316 229274 64 8 3659 21483 1210227 586352 64 16 4556 44912 852702 532815 64 32 4369 25097 1013707 877797 64 64 8397 72809 668072 1484662 128 4 2557 12286 1032829 576780 128 8 9498 20272 947186 811221 128 16 6414 21045 889145 627328 128 32 5981 9159 1319723 1152564 128 64 5748 59291 1487977 1266785 128 128 8689 48949 1637771 1561553 256 4 8363 6737 535583 323630 256 8 8665 10073 340891 180557 256 16 12623 33285 1201314 850956 256 32 18565 48798 1169901 1016025 256 64 22069 81271 1339154 1243036 256 128 18059 125366 1354356 1437779 256 256 25887 95768 1662639 1970871 512 4 11031 11303 386112 264312 512 8 12886 21238 779258 412517 512 16 8252 22763 146627 182923 512 32 21350 58393 566497 982917 512 64 14878 63627 1413929 869143 512 128 53454 105352 1565443 1267097 512 256 12822 84001 625941 1541840 512 512 18102 130873 1475116 2132967 1024 4 7416 6161 160572 303321 1024 8 7369 16899 793189 408779 1024 16 26844 22297 838728 544990 1024 32 11215 18538 1259592 531436 1024 64 20953 35071 1537317 442925 1024 128 45430 44745 2102484 781641 1024 256 42555 51024 1229309 1519371 1024 512 51866 101485 1253344 1607514 2048 4 5073 5829 359866 297674 2048 8 12339 11325 454715 862979 2048 16 19558 24341 654281 965073 2048 32 14669 26529 1326260 660672 2048 64 15048 57155 422176 363582 2048 128 13362 38680 515360 439589 2048 256 31558 35876 312818 616835 2048 512 28658 78152 680670 391504 4096 4 6247 6613 282309 303521 4096 8 12147 16485 449572 327081 4096 16 11980 26246 908036 762878 4096 32 27595 38965 690708 293222 4096 64 19777 40479 620686 583559 4096 128 29197 38000 1143814 960853 4096 256 33462 52459 1043049 402001 4096 512 37171 58446 1816283 373452 8192 4 6226 6194 146524 135090 8192 8 9788 9686 705165 234903 8192 16 20190 23365 696898 424389 8192 32 17533 35189 675630 812944 8192 64 33226 46352 1357673 1463872 8192 128 30431 46434 1051759 744461 8192 256 39831 52772 1002185 625680 8192 512 37234 32205 682325 400842 16384 4 6003 8421 163052 178661 16384 8 12225 10136 628701 423961 16384 16 16846 24900 477846 263074 16384 32 28567 34559 719803 782728 16384 64 33906 60971 714578 652700 16384 128 35837 42033 1069533 959812 16384 256 35332 67589 843796 1049171 16384 512 41812 61731 1050117 658441 32768 4 7313 6541 578398 364023 32768 8 9075 14233 340616 294920 32768 16 15019 21997 436545 323944 32768 32 25606 35106 744693 582781 32768 64 33037 41945 861498 709081 32768 128