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 Dec 29 14:04:41 2025 Auto Mode Machine = Linux oleg418-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-oleg418-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 8964 18835 261173 168847 64 8 6425 32487 351905 208444 64 16 10987 53464 647135 496362 64 32 13622 72222 987600 659861 64 64 13112 95095 913649 1168097 128 4 9429 21907 231030 243721 128 8 17677 34426 576780 346859 128 16 20378 53246 630273 539674 128 32 23650 80953 1074159 753179 128 64 14328 99998 864797 154060 128 128 21850 122718 1165070 1319723 256 4 13041 20575 288655 350689 256 8 17875 32929 733527 410325 256 16 19838 66651 624702 543720 256 32 16667 86838 977189 1453348 256 64 49467 115732 1123389 1084800 256 128 44145 125308 1332507 1334162 256 256 35126 157814 1319408 1662639 512 4 17287 19958 307318 249509 512 8 23562 34452 397181 257004 512 16 41514 48371 666753 619084 512 32 46310 84087 792486 766464 512 64 60477 132676 1049187 1270846 512 128 37214 142417 1305615 1227971 512 256 57723 146079 1267097 1541840 512 512 63232 199213 1968713 1480200 1024 4 17826 19681 271116 222228 1024 8 25602 34043 396624 406343 1024 16 36798 53101 950885 760331 1024 32 33720 93100 699528 757382 1024 64 71165 114784 1158358 1107005 1024 128 71077 151836 1563622 1148139 1024 256 61794 126249 1720874 1229309 1024 512 72717 158463 1408737 1651398 2048 4 17960 20876 241454 203838 2048 8 30222 35331 481881 541070 2048 16 50035 56982 719858 598276 2048 32 53330 89730 1365474 859439 2048 64 64781 109052 1164293 1048089 2048 128 84722 126897 1354493 908237 2048 256 69172 135306 1577638 1391351 2048 512 78239 126755 1738217 1793378 4096 4 17294 19933 231647 259797 4096 8 30382 34628 398015 445954 4096 16 41685 52786 896661 605910 4096 32