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 Sep 1 21:00:05 2026 Auto Mode Machine = Linux oleg628-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-oleg628-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 2627 8728 507625 447537 64 8 3826 22947 743988 280553 64 16 2567 8381 725882 653436 64 32 3238 35461 1232453 1013707 64 64 4404 65031 1163036 423529 128 4 4046 7514 116034 584313 128 8 3199 11179 640042 576161 128 16 5728 18231 1231904 434078 128 32 9073 60175 1436229 1133103 128 64 5209 42061 852438 1185654 128 128 7099 62045 1231904 1642783 256 4 4813 7844 184307 195268 256 8 8084 17678 287958 356510 256 16 8568 23598 716876 750970 256 32 7749 34330 1143731 1075025 256 64 7590 43434 1049800 1312954 256 128 13723 37614 1570244 1673001 256 256 11129 33925 1619994 1897721 512 4 8061 9241 175465 415228 512 8 6424 17860 607353 817837 512 16 14060 19453 1009722 848872 512 32 10053 33622 518740 512549 512 64 16101 38496 1190529 731231 512 128 14148 50845 1270094 1216149 512 256 13897 76486 820650 930933 512 512 14009 79036 1600443 2039772 1024 4 10463 7687 122051 272492 1024 8 10048 16245 557729 304137 1024 16 10207 24867 1193442 369275 1024 32 12223 34380 1239598 1153071 1024 64 27398 33401 292317 1335165 1024 128 33730 24845 1345623 447961 1024 256 37383 52338 378584 898189 1024 512 27148 43959 204846 355932 2048 4 5628 8525 605914 239421 2048 8 9882 9629 149152 566999 2048 16 15413 16278 271080 595703 2048 32 18714 27387 496964 268235 2048 64 23630 41670 901375 543501 2048 128 31993 48123 861594 508948 2048 256 42800 51232 755437 303179 2048 512 26796 62450 785271 195867 4096 4 6680 5992 236120 360945 4096 8 11622 11642 237144 363989 4096 16 17572 14155 371924 321685 4096 32 15984 21429 767890 339665 4096 64 34717 22759 795003 498721 4096 128 24155 43918 911843 928149 4096 256 29852 32988 838132 761188 4096 512 31261 56835 700881 1098119 8192 4 5922 6502 343622 338330 8192 8 10811 14261 537636 216582 8192 16 2950 27663 911838 573869 8192 32 31565 27888 440188 361518 8192 64 33139 33273 1081011 687307 8192 128 25975 34409 478949 696008 8192 256 36147 46149 890222 773784 8192 512 36015 47403 545117 935702 16384 4 7257 7548 278118 325848 16384 8 10159 11647 591889 432568 16384 16 14503 20697 386496 320243 16384 32 21825 32613 711854 558836 16384 64 29392 38136 991225 414335 16384 128 28648 46109 704693 415331 16384 256 44928 56694 1298239 992556 16384 512 41807 65597 1307676 942915 32768 4 7606 9554 545659 361399 32768 8 11297 11972 286912 449992 32768 16 16143 18088 336309 483739 32768 32 30977 34106 677724 602485 32768 64 30007 37374 1049041 640413 32768 128 32431 45650 980084 878076 32768 256 31110 43375 1033687 543921 32768 512 37419 55309 705144 830708 65536 4