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: Sat Sep 5 11:04:49 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 2036 7302 450541 481234 64 8 4654 4761 373966 587635 64 16 4477 28307 939223 727850 64 32 5170 26315 1143223 1083249 64 64 2445 39000 222250 1599680 128 4 1923 5152 571865 571257 128 8 2312 13957 199668 509943 128 16 5101 30316 340480 438331 128 32 3113 36601 1162547 767171 128 64 8501 32923 444501 1040839 128 128 7699 34801 767171 1471662 256 4 5634 3819 248792 189646 256 8 4533 7521 770920 545931 256 16 8311 23893 987979 532133 256 32 11277 36488 1241598 533190 256 64 10704 40095 1076103 175081 256 128 9921 63936 1272498 1368162 256 256 10178 67779 805021 1649865 512 4 4414 5087 435700 320003 512 8 5780 10631 302385 492790 512 16 17696 25296 870905 544796 512 32 22377 20506 255354 643960 512 64 14727 24335 1028091 576535 512 128 14984 37050 817837 927315 512 256 21466 65364 793951 278286 512 512 11812 91985 672811 1933266 1024 4 5704 3153 224411 583174 1024 8 8540 20395 333672 315162 1024 16 20497 27174 504945 760735 1024 32 13284 36400 587482 598868 1024 64 19538 25189 1203474 1145383 1024 128 30777 58782 925877 1163693 1024 256 32903 78714 314977 1499217 1024 512 20310 88680 1084914 1577984 2048 4 6953 10704 421575 185460 2048 8 6031 12802 876720 408290 2048 16 14439 13165 385478 825177 2048 32 14688 20780 484163 660215 2048 64 29975 35482 613926 382236 2048 128 22511 42974 689799 453514 2048 256 30773 65697 1455722 1317109 2048 512 30850 81099 1615315 968337 4096 4 6090 6928 254411 222330 4096 8 14612 13268 277019 170496 4096 16 14562 11621 489960 470580 4096 32 18992 20583 442759 455267 4096 64 27863 24867 722517 731157 4096 128 32264 45227 699454 724589 4096 256 41201 51042 580502 671041 4096 512 46560 39192 947290 619009 8192 4 5585 6827 251333 217358 8192 8 11642 2070 322506 533894 8192 16 15777 13911 423860 366465 8192 32 20927 19327 611070 420555 8192 64 21262 28659 462590 525870 8192 128 29883 28483 456560 397076 8192 256 33452 32536 578458 287246 8192 512 25977 37976 889070 787384 16384 4 5483 5735 546877 376921 16384 8 10064 11050 368015 376756 16384 16 15687 16840 384249 404553 16384 32 17210 25358 343681 496123 16384 64 24996 30347 513814 331632 16384 128 19915 38254 647619 572725 16384 256 26532 41864 1450151 732766 16384 512 25826 30403 408150 219040 32768 4 5419 5340 265282 202594 32768 8 9027 9396 488250 454145 32768 16 13631 18242 945521 647909 32768 32 17249 24787 460037 326030 32768 64