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: Wed Aug 26 04:10:56 2026 Auto Mode Machine = Linux oleg427-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-oleg427-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 3701 8446 59641 533875 64 8 4590 13852 821391 769584 64 16 5431 13832 983980 1070292 64 32 3209 58715 1066042 1049372 64 64 5599 38882 1249666 1679761 128 4 6029 10827 566435 113676 128 8 5778 24329 876086 723735 128 16 4617 53623 948860 841746 128 32 8689 39851 1319723 609522 128 64 5964 57218 735635 695603 128 128 7252 15393 1231904 1727352 256 4 4002 18127 380920 299108 256 8 5532 22552 833776 383779 256 16 9228 51927 1152323 521283 256 32 13571 9939 1007446 897923 256 64 22420 67761 1347557 1103757 256 128 10025 90811 1523457 1540948 256 256 19147 142051 1008392 2152625 512 4 6041 10120 168195 392391 512 8 15169 12409 631277 878386 512 16 33216 39959 796306 943200 512 32 17803 32753 300481 988345 512 64 28237 55579 1110496 489867 512 128 20054 44206 504363 1270846 512 256 39318 153481 1550747 1267845 512 512 28558 69265 902757 663048 1024 4 15615 18555 249928 304763 1024 8 10225 22161 291821 454695 1024 16 24019 40565 615430 746327 1024 32 25032 42159 585879 250613 1024 64 34079 87105 1920993 775712 1024 128 26024 89729 488797 1122924 1024 256 57028 62740 1227903 225495 1024 512 40665 94213 1662264 717165 2048 4 12366 15325 478073 524038 2048 8 12635 22983 807870 406589 2048 16 14393 18646 626691 435731 2048 32 41278 62092 958397 986010 2048 64 35691 62731 371958 1196235 2048 128 34420 39777 350741 889245 2048 256 44843 80766 441283 1227869 2048 512 50627 54891 825494 902606 4096 4 7830 9382 318111 324155 4096 8 17673 17076 687832 458523 4096 16 25539 29754 796884 362377 4096 32 20472 21209 673461 676351 4096 64 33408 27441 709507 389241 4096 128 27653 58420 1452498 539945 4096 256 42856 78422 441099 714078 4096 512 54478 106029 713455 914902 8192 4 8173 10862 305659 199114 8192 8 20906 17857 368181 341844 8192 16 17251 22221 776564 518842 8192 32 25494 25296 498901 665476 8192 64 23797 65014 813521 269085 8192 128 34231 48477 913973 435165 8192 256 31381 51278 1338318 1200809 8192 512 33083 41021 481149 517498 16384 4 7832 8316 246561 280126 16384 8 9519 18465 191964 789137 16384 16 14475 29690 488446 752423 16384 32 38818 47293 350459 378417 16384 64 22482 57118 936439 590948 16384 128 32657 35155 1099515 931754 16384 256 25249 65931 545064 802265 16384 512 50600 43787 1143498 324589 32768 4 6327 8912 475766 426238 32768 8 7788 9958 224867 367094 32768 16 18456 25570 608538 397052 32768 32 22727 32278 657713 503108 32768 64 31815 38853 485487 547803 32768 128 29602 39173 467206 543768 32768 256 40987 56042 647152 491953 32768 512