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: Mon Aug 24 19:36:47 2026 Auto Mode Machine = Linux oleg443-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-oleg443-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 4 775 3432 524487 516414 64 8 1054 6488 743988 653436 64 16 1335 4006 1033216 889431 64 32 1890 55996 1049372 998622 64 64 2289 64268 1083249 1780008 128 4 1803 5333 624409 511887 128 8 2424 7057 603357 370050 128 16 3563 10711 1038825 1007629 128 32 8697 33525 1102844 739689 128 64 6888 13601 1057236 1359835 128 128 1857 92074 1521718 1911894 256 4 2314 2125 591005 587127 256 8 2158 8998 689708 761623 256 16 4674 8000 1117543 937924 256 32 15256 39999 1237306 883152 256 64 9304 17196 47172 458706 256 128 13621 64497 792543 513063 256 256 13426 77977 1532153 1970871 512 4 2233 8643 363622 563820 512 8 5027 6219 859060 329277 512 16 9899 12671 977103 255354 512 32 8169 21557 656360 848872 512 64 7182 51108 1155302 175824 512 128 9928 30543 1127402 904277 512 256 8709 42289 390820 622133 512 512 16902 29327 1488408 1034530 1024 4 3370 3263 364666 579867 1024 8 8297 8326 843505 231524 1024 16 9094 16276 280079 968686 1024 32 4943 10888 1151834 458579 1024 64 11675 31416 1517224 557078 1024 128 17084 66514 1055843 222516 1024 256 13709 19897 1214706 412232 1024 512 26106 55974 1340164 878890 2048 4 3951 4393 150875 325860 2048 8 6184 7683 938195 826845 2048 16 9202 17016 386989 577715 2048 32 21981 21870 801912 1147343 2048 64 31079 52871 476191 1195569 2048 128 48897 57831 1476490 850168 2048 256 30966 44041 472862 441283 2048 512 20853 80364 634046 940764 4096 4 6309 10986 356548 239211 4096 8 9260 10747 416766 380213 4096 16 19645 24321 451747 352582 4096 32 28369 27683 858143 465455 4096 64 33426 28561 476321 294949 4096 128 30303 56201 972657 448773 4096 256 33770 47322 530098 1553782 4096 512 30576 47987 953441 1332412 8192 4 7109 7260 229210 280241 8192 8 14832 11979 195089 393393 8192 16 15735 21945 746629 288067 8192 32 20803 33089 742033 365094 8192 64 24643 29546 677295 542055 8192 128 26946 42742 956328 526240 8192 256 31144 49470 727085 875969 8192 512 30304 48829 795570 533016 16384 4 7842 9234 335415 233849 16384 8 12356 18296 523553 264190 16384 16 20753 21751 564343 574170 16384 32 27043 31009 663425 625371 16384 64 33756 44154 1008492 784864 16384 128 33434 43641 494328 741696 16384 256 34538 50798 982425 644860 16384 512 36319 64493 1006822 499982 32768 4 7264 7177 285727 305255 32768 8 11564 10504 395104 357534 32768 16 12070 16866 320134 471427 32768 32 25388 29070 422279 685293 32768 64 34720 32313 616009 715582 32768 128 39291 42629 1107290 580808 32768 256 37623 43385 753636 596606 32768 512 39636 45015 850037 621041 65536 4