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: Thu Jul 16 03:13:07 2026 Auto Mode Machine = Linux oleg208-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-oleg208-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 1930 4504 576282 507625 64 8 3051 12436 592827 566551 64 16 4041 6773 913649 1101022 64 32 2574 16863 1049372 234481 64 64 2294 32889 969761 1734015 128 4 2805 7170 354649 425141 128 8 4533 19130 640042 646983 128 16 3918 20125 790905 814915 128 32 4975 25625 1133103 1007629 128 64 5942 25152 1231904 377597 128 128 5777 26208 726674 1319723 256 4 3282 4475 491458 60221 256 8 6073 10170 817898 510866 256 16 8179 17023 847597 812944 256 32 11147 38466 870974 977189 256 64 9524 51697 1212164 1071806 256 128 9029 83959 1300235 1415041 256 256 11179 61154 1256123 1274008 512 4 3697 3040 358523 407043 512 8 4008 7364 538918 447597 512 16 14806 27019 388698 172866 512 32 19817 42899 1430887 1299295 512 64 23950 24481 691887 155111 512 128 15257 39098 1580419 1245780 512 256 17376 83155 1518938 1514652 512 512 21679 50793 1770674 1954379 1024 4 6896 7711 164837 250906 1024 8 5663 18309 225696 711110 1024 16 6648 10007 957030 898941 1024 32 13640 16721 76485 992182 1024 64 21414 33227 688648 898941 1024 128 23210 45978 921705 900449 1024 256 18323 60009 674587 645587 1024 512 29553 50115 225851 560202 2048 4 7739 4559 250028 96024 2048 8 7967 11737 213707 316483 2048 16 6573 8005 656381 187100 2048 32 20753 27671 633251 285362 2048 64 11042 48687 710628 282249 2048 128 26817 47496 625140 348111 2048 256 26575 35764 904222 1267362 2048 512 18445 29141 211638 138536 4096 4 3574 3908 162694 129925 4096 8 8505 4611 207404 243141 4096 16 11177 17856 170177 454760 4096 32 15574 17606 880125 486395 4096 64 32091 35017 479405 282638 4096 128 40743 53746 435840 636508 4096 256 31273 40790 406433 523109 4096 512 27876 56819 472158 920244 8192 4 1924 5203 124286 251579 8192 8 6492 6021 425161 263281 8192 16 27034 12123 243932 519666 8192 32 21208 19468 456687 454128 8192 64 19738 19879 290591 782418 8192 128 15381 30518 1186544 424520 8192 256 37792 37475 612529 345786 8192 512 16193 51577 992602 646506 16384 4 4982 4824 180972 195401 16384 8 16682 10240 138310 483933 16384 16 19909 13111 435617 312964 16384 32 17091 27046 439097 213988 16384 64 14740 11993 387750 897064 16384 128 17739 12650 613682 607826 16384 256 24386 19652 242837 424082 16384 512 19542 16449 466699 333171 32768 4