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 Sep 11 23:00:40 2026 Auto Mode Machine = Linux oleg326-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-oleg326-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 2038 6271 557144 512471 64 8 2375 8854 361380 673098 64 16 5021 11327 789967 789967 64 32 1790 10141 410573 313664 64 64 2552 44079 789967 1526887 128 4 3822 10356 692017 432679 128 8 2154 11115 361576 809997 128 16 9711 21989 1111981 334123 128 32 3441 15790 1142750 901083 128 64 7524 80348 558771 1007629 128 128 5812 50572 1561553 1705404 256 4 5776 5970 680528 587127 256 8 3735 7109 931416 576720 256 16 3268 29496 367366 453092 256 32 8804 27207 1455317 599585 256 64 8575 15343 1117543 927393 256 128 15876 95555 856386 713067 256 256 5845 25075 1094754 761623 512 4 4537 7770 481735 463738 512 8 11021 7977 813808 777002 512 16 9395 17838 314889 607353 512 32 10719 15073 984720 1174897 512 64 13369 31202 1264113 1117430 512 128 12224 63318 1418599 1350783 512 256 21343 28054 969603 772252 512 512 24891 86516 93037 1002183 1024 4 3375 5881 638865 281622 1024 8 7016 4691 213512 136844 1024 16 18603 13815 459216 145642 1024 32 8894 36378 1424152 1141730 1024 64 12896 42753 1043783 1259592 1024 128 35522 56509 887425 955327 1024 256 31266 63467 1351126 1389145 1024 512 40514 39131 1096548 1643814 2048 4 6112 8951 260223 131517 2048 8 12698 12074 904603 203457 2048 16 18532 17858 417274 345896 2048 32 20577 20518 1232980 538661 2048 64 20296 49651 1335124 482450 2048 128 33554 48505 482667 203072 2048 256 26893 44182 1012390 614277 2048 512 30547 54531 1512630 1505736 4096 4 6561 6162 181842 169627 4096 8 8569 8302 389682 386961 4096 16 8886 15006 245136 488483 4096 32 20319 29580 418003 655149 4096 64 21119 39634 477115 576335 4096 128 17067 30809 398754 425910 4096 256 31688 41027 868731 797327 4096 512 23380 69669 553799 1497181 8192 4 6449 5850 401113 257432 8192 8 7069 7475 358071 162788 8192 16 8350 11486 368079 248499 8192 32 16135 24872 783256 793402 8192 64 14382 23772 613218 482365 8192 128 24411 30678 871304 428405 8192 256 25012 33549 679102 596173 8192 512 38552 44478 905876 673630 16384 4 5733 6441 242517 409700 16384 8 9628 8949 294115 302421 16384 16 12955 13653 471308 219110 16384 32 18006 25671 919572 637213 16384 64 23918 25896 389169 410011 16384 128 26107 38876 705808 762331 16384 256 24764 34849 814715 343293 16384 512 29064 42924 584474 561540 32768 4 5356 6281 213651 267105 32768 8 8522 9890 413085 226791 32768 16 15779 19595 672218 418257 32768 32