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: Wed Sep 2 02:19:57 2026 Auto Mode Machine = Linux oleg648-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-oleg648-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 2445 8634 133033 532815 64 8 1680 7549 752329 718114 64 16 5173 12374 926260 780776 64 32 3058 31008 1105556 874936 64 64 3047 32736 1143223 1124074 128 4 2697 4199 542400 597981 128 8 6431 20548 853794 800337 128 16 5269 27187 927549 953918 128 32 6093 43419 1377278 1093856 128 64 8730 15087 1487977 1373754 128 128 3775 34762 1521718 1827299 256 4 4252 10107 563701 572721 256 8 5731 10441 933846 790209 256 16 13172 32636 1007446 1012194 256 32 16398 44276 1185399 794889 256 64 17890 65878 1407621 148249 256 128 6790 41171 1523457 547044 256 256 7749 53001 1662639 1132871 512 4 3879 11219 502358 309756 512 8 5750 7145 570865 629796 512 16 12142 35899 587899 748563 512 32 16817 30847 1222379 1169140 512 64 21019 29652 947779 701378 512 128 19173 40056 912345 1150351 512 256 20319 26868 349252 1605228 512 512 22981 64728 1600443 2073249 1024 4 4097 7578 566707 84160 1024 8 8928 12237 428818 171327 1024 16 16270 29812 428990 866304 1024 32 17305 26645 1043783 969561 1024 64 11212 38535 1232130 176516 1024 128 25801 45239 1689730 667147 1024 256 13285 25298 1805514 930894 1024 512 31457 74271 1675884 1185209 2048 4 5578 5003 130245 216973 2048 8 9820 10381 176370 895455 2048 16 9197 15391 1162246 376325 2048 32 18362 27722 364214 442921 2048 64 38754 30666 460023 522826 2048 128 29757 47626 640762 1388428 2048 256 16173 19823 358918 906607 2048 512 39639 57680 767314 1614101 4096 4 8604 6856 421221 343420 4096 8 10495 11660 317125 246049 4096 16 27748 21886 472925 372941 4096 32 21358 33822 859388 513233 4096 64 48317 71673 662680 460378 4096 128 16409 31090 298107 482840 4096 256 39534 30714 369175 462100 4096 512 30722 47016 637807 641092 8192 4 4994 6860 156769 255480 8192 8 7862 8423 409147 370124 8192 16 19052 20528 874921 346400 8192 32 25809 32471 747848 632533 8192 64 22638 17145 929726 226453 8192 128 22153 39426 1136166 648262 8192 256 32086 33543 837882 656148 8192 512 17695 21468 313150 493611 16384 4 3675 6948 564302 237907 16384 8 8659 15529 443229 388993 16384 16 17032 31513 704144 477514 16384 32 18800 47134 630564 1058871 16384 64 16110 39823 945366 595217 16384 128 24063 37756 832723 208082 16384 256 34304 57759 1358097 583873 16384 512 33867 34717 768048 575280 32768 4 5765 5256 175494 264554 32768 8 12657 8863 323414 359791 32768 16 13551 12237 303244 265659 32768 32