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 11:40:54 2026 Auto Mode Machine = Linux oleg402-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-oleg402-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 1440 4569 552557 467002 64 8 1908 5503 290890 571375 64 16 2393 25621 901377 735831 64 32 3481 48412 1119387 1049372 64 64 3153 39552 852702 1780008 128 4 3785 4176 576780 420809 128 8 3626 16214 330828 595328 128 16 3189 16860 895074 774922 128 32 5710 32291 1105114 493989 128 64 7693 40986 684081 1105114 128 128 4005 49137 1373754 1579934 256 4 5786 9852 209151 484801 256 8 4869 10011 345943 408918 256 16 3682 29688 873809 820398 256 32 10362 36591 885337 921029 256 64 14840 39476 1237306 809878 256 128 4576 42609 1354356 215835 256 256 6916 108658 1298662 2061693 512 4 3728 13414 479476 366977 512 8 10578 9686 673655 693003 512 16 6081 9773 986529 176547 512 32 5732 20994 644927 310114 512 64 7491 15450 1270094 926116 512 128 16395 29658 1264113 346155 512 256 13065 24746 107155 1426135 512 512 8086 25413 326523 603089 1024 4 5456 4965 284513 251774 1024 8 12697 6154 92946 175041 1024 16 9568 8393 556861 304115 1024 32 13834 12855 640389 469507 1024 64 23318 41350 748538 203458 1024 128 13441 41212 384963 693765 1024 256 13011 44790 1025833 1218843 1024 512 33703 83894 722717 993100 2048 4 5390 6639 143125 279785 2048 8 5318 10650 878603 320199 2048 16 23526 32138 575778 981280 2048 32 10524 20193 326578 317372 2048 64 30414 26974 1458688 465558 2048 128 36340 43282 385617 330270 2048 256 42105 55248 684467 1130283 2048 512 43150 41860 350698 359610 4096 4 5771 7356 334396 194463 4096 8 9823 6913 482732 579993 4096 16 14236 19945 276604 378663 4096 32 23471 44085 892377 803443 4096 64 31477 26604 441383 437182 4096 128 23254 29307 368612 1190994 4096 256 15602 34878 465985 1002220 4096 512 34174 31501 1723189 683563 8192 4 4507 3657 314109 207781 8192 8 8371 16664 371164 332171 8192 16 10148 14822 697846 813752 8192 32 22244 24590 422183 434884 8192 64 24750 30316 722529 344200 8192 128 26207 26642 747035 767750 8192 256 29343 29888 327757 287934 8192 512 25423 44042 885541 980507 16384 4 5653 6506 191115 230903 16384 8 9435 11659 558682 469347 16384 16 13570 15855 272263 222520 16384 32 15928 20755 642936 478965 16384 64 19013 29164 779744 656517 16384 128 26920 32877 1044165 653402 16384 256 36391 38138 518810 921693 16384 512 30558 46954 843630 404323 32768 4 6232 5663 258300 245500 32768 8 10003 8795 349552 360598 32768 16