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 Aug 15 17:54:32 2026 Auto Mode Machine = Linux oleg457-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-oleg457-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 1564 8760 180788 402569 64 8 3937 10210 926260 571375 64 16 4498 39976 863676 913649 64 32 4833 45615 1392258 1066042 64 64 2816 38574 1183548 1679761 128 4 5214 6186 646205 498114 128 8 4816 20529 361576 715059 128 16 6452 19869 913347 198487 128 32 6773 10940 1243315 1000121 128 64 5786 58477 1359835 1294270 128 128 11010 59396 1349580 2175277 256 4 6411 6248 473054 533455 256 8 9228 14304 852984 735537 256 16 10432 19696 127042 873809 256 32 10504 40998 1123389 659625 256 64 15580 54934 1347557 1169901 256 128 19669 65305 593947 995306 256 256 7959 62730 1729594 1694118 512 4 4126 4391 157488 271187 512 8 5629 7625 862164 627404 512 16 12804 25399 842214 330087 512 32 16566 35085 1120344 939075 512 64 18459 31484 1245780 703215 512 128 19099 54409 873740 496206 512 256 24870 53707 1635797 228266 512 512 20762 58615 1273106 1910902 1024 4 5808 5619 187301 541213 1024 8 7912 10141 848504 409910 1024 16 10827 8538 354317 335418 1024 32 9353 19357 1250425 359929 1024 64 17891 37046 520866 411757 1024 128 14484 48997 588206 912695 1024 256 14717 49839 1356245 1139005 1024 512 12712 63346 878890 1013727 2048 4 4905 4655 186844 196904 2048 8 7108 8884 230578 119429 2048 16 12930 22020 1033835 228651 2048 32 16152 25578 465887 1072293 2048 64 13600 23382 1388652 329421 2048 128 29521 50128 1010365 1294482 2048 256 37433 48984 307323 735074 2048 512 16498 45882 627240 276828 4096 4 5127 4899 276738 419156 4096 8 7400 7824 567951 528094 4096 16 14203 16627 458058 203418 4096 32 21301 22544 304533 543394 4096 64 20325 34718 217988 206650 4096 128 23057 23508 747867 339350 4096 256 22008 35382 461888 662680 4096 512 21140 46125 1758105 593108 8192 4 4951 4842 552844 320400 8192 8 8207 7737 309891 179307 8192 16 15073 22420 266553 439862 8192 32 16573 17414 839008 551912 8192 64 19721 23553 453846 536126 8192 128 38363 40846 730455 584430 8192 256 24156 36205 678646 747783 8192 512 22577 31896 763196 707488 16384 4 5412 5928 221887 412042 16384 8 14744 19267 533003 541423 16384 16 20367 15699 633763 419479 16384 32 23741 21703 301913 662032 16384 64 26698 42678 696713 652069 16384 128 24236 27693 523569 349547 16384 256 25697 27456 1199946 659877 16384 512 29917 49196 988601 910821 32768 4 5615 10454 248086 154744 32768 8 8613 12801 325680 318240 32768 16 16295 19861 362292 472549 32768 32 26757 25888 991495 585068 32768 64 33443 29927 821252 805291 32768 128 35384 32732 1105420 612713 32768 256