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 14:37:09 2026 Auto Mode Machine = Linux oleg305-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-oleg305-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 1802 7964 520419 489126 64 8 5579 17163 645579 633392 64 16 3008 27178 901377 763021 64 32 3150 43628 160758 727850 64 64 3529 54706 1310683 1460430 128 4 4640 12954 318465 435487 128 8 4052 24549 542400 587511 128 16 10618 24946 574312 266198 128 32 7239 27298 1196221 934004 128 64 7128 20652 196310 1220700 128 128 11183 50392 824932 511887 256 4 6887 13939 395076 468922 256 8 6647 22671 449865 673696 256 16 10085 19140 398744 706964 256 32 12345 66734 1185399 761623 256 64 18524 36877 1278559 1019886 256 128 16996 63509 1495866 1495866 256 256 11743 65725 996229 656399 512 4 6903 13849 455960 257158 512 8 7148 19870 485767 603767 512 16 6409 29869 906185 732478 512 32 19374 27917 478515 936209 512 64 13039 29470 1152822 915847 512 128 17692 23343 690996 258334 512 256 25200 75816 1248678 1375881 512 512 17868 64777 438727 1316823 1024 4 8144 5736 101943 267003 1024 8 11306 16167 695675 308417 1024 16 15914 42093 280317 295008 1024 32 20026 23405 256771 205414 1024 64 17037 32219 589821 403177 1024 128 31626 40848 1005892 371029 1024 256 29314 72804 310783 1294520 1024 512 32022 65326 1342258 308240 2048 4 9417 9756 301975 266910 2048 8 15878 21704 515887 469631 2048 16 25575 23487 449715 489460 2048 32 19754 27873 323333 608059 2048 64 25727 40851 643787 390988 2048 128 28004 35417 347646 713342 2048 256 21085 70115 511737 425332 2048 512 22210 54633 517035 893128 4096 4 7222 8155 295380 358984 4096 8 13172 16885 459038 215025 4096 16 14459 18587 685308 556670 4096 32 21142 29333 528240 899055 4096 64 37387 48328 432482 508885 4096 128 33879 61151 717088 1050255 4096 256 41761 87290 947081 840222 4096 512 35930 81007 547953 568327 8192 4 8595 8669 136930 195433 8192 8 11192 16383 277818 352751 8192 16 13787 24081 364073 379804 8192 32 26244 33206 372500 429798 8192 64 27371 32470 483247 439676 8192 128 27193 48246 1069736 798435 8192 256 37035 65448 523482 1080603 8192 512 39878 57231 1112440 1333747 16384 4 7584 7745 362110 226473 16384 8 13383 15134 319662 335434 16384 16 20980 24677 443349 248318 16384 32 26540 39438 648359 856052 16384 64 33212 40438 568357 710118 16384 128 40033 66790 635040 851164 16384 256 32912 72644 1097986 851829 16384 512 54894 85117 770641 447465 32768 4 9242 8802 278805 210603 32768 8 18474 16764 404438 488922 32768 16 24337 25890 616902 397955 32768 32 24453 35304 513073 435964 32768 64 35960 41252 814676 802212 32768 128 64185 82080 1150812 415015 32768 256 34489 40482 986868 878924 32768 512 34159 70289 590637 431305 65536 4