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 Aug 12 16:33:56 2026 Auto Mode Machine = Linux oleg146-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-oleg146-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 2659 6759 659861 499130 64 8 2814 18642 681644 735831 64 16 8722 34040 969761 298990 64 32 6639 47655 209747 1105556 64 64 2269 57043 1484662 1599680 128 4 3046 5676 597981 604036 128 8 4013 15447 83341 609522 128 16 7224 21657 1024942 94042 128 32 14504 27158 1455701 727658 128 64 12972 50293 1319723 1231904 128 128 14670 90324 1526043 1967960 256 4 10199 12078 717355 436692 256 8 9895 24960 1506359 855703 256 16 18673 32724 47718 651223 256 32 23930 52784 671589 1163562 256 64 13276 72030 1479379 1292410 256 128 27959 84962 1347557 1591186 256 256 26752 122716 516022 338633 512 4 9327 10379 613951 368362 512 8 14153 21008 492338 296294 512 16 20889 18120 627587 1070633 512 32 34659 76932 712076 833713 512 64 21651 72457 1055375 1160923 512 128 38208 38177 1528669 1426135 512 256 23030 36368 1442420 1506154 512 512 13758 96149 362089 958781 1024 4 7815 7389 632840 312115 1024 8 14547 15299 625194 465034 1024 16 24444 23219 559254 1015645 1024 32 17249 47050 980853 897438 1024 64 39683 74445 1188159 627478 1024 128 35948 69118 510466 844168 1024 256 54051 108692 1535119 912501 1024 512 47843 169789 1442326 462331 2048 4 5626 9520 664300 392255 2048 8 11225 10656 954776 948241 2048 16 31094 29252 359685 256195 2048 32 30700 36753 1272054 649532 2048 64 36583 33780 336519 345715 2048 128 41698 64760 2144906 1603854 2048 256 48134 71068 315078 352135 2048 512 41179 121724 1328106 1635615 4096 4 7469 6545 369580 199182 4096 8 9530 16576 679615 498967 4096 16 17891 23430 545846 579191 4096 32 12974 16751 416806 641499 4096 64 23626 39473 1425738 944218 4096 128 44889 79001 1489523 300385 4096 256 42025 59648 1738535 668950 4096 512 40737 69081 1789419 658540 8192 4 6616 6870 246591 298640 8192 8 10681 13082 648519 698073 8192 16 18989 22761 702569 622111 8192 32 28310 33754 894812 751561 8192 64 29168 40093 901906 767698 8192 128 39215 47933 1219606 540478 8192 256 42617 51850 559871 695417 8192 512 37452 72029 1049030 719789 16384 4 6375 6800 302115 400011 16384 8 11036 9005 341595 247439 16384 16 17223 22920 329598 636988 16384 32 25549 30954 720240 806294 16384 64 31237 46018 1071551 846665 16384 128 50686 47313 499176 429352 16384 256 33051 48149 503938 939935 16384 512 39096 65446 885630 981555 32768 4 6478 6722 237054 255156 32768 8 10140 12287 629876 513337 32768 16 16185 22828 1244131 752200 32768 32 27056 31169 935023 806539 32768 64 33554 53306 1292633 930113 32768 128 40163 59595 1181510 884427 32768 256 47172 63540 1235819 905819 32768 512 48305 83951 1921073 1098862 65536 4