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: Tue Apr 14 17:15:16 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 2697 16584 560635 520419 64 8 5567 12453 939223 460591 64 16 2732 17236 143180 842003 64 32 6180 60666 1330167 1163036 64 64 4171 33932 799377 266620 128 4 4852 12370 411772 511887 128 8 6118 10815 341345 739689 128 16 10733 53963 465304 735635 128 32 7666 29609 1114289 355354 128 64 5521 53378 1421023 1155043 128 128 9871 63937 1467639 393945 256 4 9172 6974 152113 250242 256 8 8421 13166 271434 369897 256 16 19693 41242 1089202 904732 256 32 8664 15760 1231629 910872 256 64 14002 48327 885337 1293967 256 128 11895 112471 1504249 1495866 256 256 11841 80328 976301 861885 512 4 10756 7790 531712 471372 512 8 11280 13666 346211 743123 512 16 13388 46956 440256 301367 512 32 18765 27416 992456 1047141 512 64 19684 37903 922139 589190 512 128 15189 36861 1028091 1002183 512 256 19761 85561 305700 1383861 512 512 20418 60980 558251 2022482 1024 4 8926 7994 593243 326122 1024 8 12376 17137 118711 273794 1024 16 8738 13463 868581 572066 1024 32 32791 28190 1039489 982648 1024 64 38151 58867 1323236 1185209 1024 128 13547 45110 599872 821090 1024 256 37038 63634 267785 1137798 1024 512 38363 84881 336944 1317957 2048 4 7704 10965 554410 137448 2048 8 14055 26080 320450 154517 2048 16 22181 35759 531825 547310 2048 32 23944 22587 1232980 1011317 2048 64 16794 68348 864891 851179 2048 128 27177 25847 617456 836996 2048 256 30315 56197 1115459 1019842 2048 512 47973 107461 1665101 318159 4096 4 9687 6154 142602 157915 4096 8 15108 19557 341101 243911 4096 16 21655 19193 504491 328890 4096 32 18859 31448 388466 723429 4096 64 22615 30748 581898 394306 4096 128 22313 24022 418645 201238 4096 256 39545 47293 354108 652016 4096 512 27842 64387 816075 1162624 8192 4 7113 8694 299917 356451 8192 8 12295 16871 443409 471134 8192 16 22687 23818 576613 436908 8192 32 2417 32275 767475 806153 8192 64 42782 35475 638908 535141 8192 128 25482 50583 961627 1209858 8192 256 30673 57434 663856 861863 8192 512 33913 58945 851821 454585 16384 4 6436 7323 295712 305807 16384 8 11253 13662 694565 456508 16384 16 20686 24875 410697 358652 16384 32 22587 23964 444686 310233 16384 64 31970 33084 772903 774000 16384 128 28393 41164 636021 371686 16384 256 29095 46151 374422 1003001 16384 512 34589 48879 541226 604038 32768 4 8607 8412 271575 248669 32768 8 11206 15921 581757 232995 32768 16 16966 25916 616844 387333 32768 32 20439 28934 780247 381605 32768 64 26581 37928 576150 607758 32768 128 32066 49173 913295 620747 32768 256 31024 49852 843189 654587 32768 512 33442 32808 491863 473217 65536 4