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 08:34:44 2026 Auto Mode Machine = Linux oleg230-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-oleg230-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 2031 6410 581273 500060 64 8 2867 12400 35873 312204 64 16 3213 16851 1002351 789967 64 32 2079 46108 735831 172537 64 64 3745 36463 1780008 1648808 128 4 2911 8292 533241 416888 128 8 5805 23121 785122 299124 128 16 4307 26063 901083 369032 128 32 7546 35822 1032829 723735 128 64 8309 45325 1281909 1093856 128 128 7002 63393 841746 2905056 256 4 3060 5542 367241 152394 256 8 3397 12110 654798 635047 256 16 7810 33040 833776 703260 256 32 11639 38386 1142514 927393 256 64 6077 20597 1230218 836374 256 128 11933 35241 136247 1206714 256 256 7169 75964 1506359 1591186 512 4 6399 6235 91492 260023 512 8 5652 6127 789862 243926 512 16 8491 10803 415550 236929 512 32 8783 13879 793951 432367 512 64 18241 24731 404132 1084694 512 128 23110 64177 1205228 855978 512 256 24034 80909 1264858 274972 512 512 24920 40280 1138158 1954379 1024 4 9397 11469 539514 264928 1024 8 10577 12605 870694 629778 1024 16 11307 30314 672369 220641 1024 32 18697 35112 1256277 1082454 1024 64 25777 38798 584205 283968 1024 128 14293 33516 552350 142895 1024 256 32034 93791 703769 758988 1024 512 24079 50083 1492445 280097 2048 4 6103 4888 303318 204679 2048 8 10047 10568 283657 406262 2048 16 13193 16846 935640 552023 2048 32 13797 19274 1057899 352743 2048 64 17158 27091 1430033 727294 2048 128 17950 50468 1405695 567149 2048 256 21304 98569 776329 390011 2048 512 25769 60892 262025 409360 4096 4 6732 6060 357171 129069 4096 8 14957 13462 477101 410463 4096 16 18025 16971 691431 353046 4096 32 15729 32189 219967 351558 4096 64 18988 29099 677017 344487 4096 128 28735 72625 1694801 684380 4096 256 89353 68734 1989376 607990 4096 512 45062 111192 603166 1316182 8192 4 7044 7022 178299 159641 8192 8 15888 15610 834565 429283 8192 16 16974 15586 424326 227688 8192 32 25457 44913 303754 187550 8192 64 35015 37669 604352 225861 8192 128 33314 44773 567978 410771 8192 256 30717 46397 682718 347841 8192 512 43191 40965 587107 579433 16384 4 8803 8253 548676 245063 16384 8 16694 8263 172763 171296 16384 16 20330 16279 513123 551189 16384 32 12413 14896 207017 268410 16384 64 17089 17287 323506 615221 16384 128 24473 31959 851745 613726 16384 256 30260 47603 802508 373023 16384 512 33714 36453 401097 538381 32768 4 5527 5844 336818 340026 32768 8 9976 11445 370909 307331 32768 16 11936 15646 573728 205250 32768 32 15196 26604 454939 427138 32768 64 19530 27329 875776 728988 32768 128