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: Sun Nov 16 22:22:56 2025 Auto Mode Machine = Linux oleg307-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-oleg307-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 3032 17631 266620 210569 64 8 7832 33280 444572 390278 64 16 9141 52165 673098 566551 64 32 7276 74424 966270 328238 64 64 7391 76005 1066042 1460430 128 4 8376 8695 267258 207783 128 8 5611 15212 397444 412721 128 16 9322 44107 662962 633995 128 32 16958 84164 940549 574312 128 64 7772 103988 1206978 1217930 128 128 7086 109861 1332828 1749872 256 4 12044 17557 174626 232925 256 8 7745 23725 145045 322754 256 16 5170 55316 664935 569985 256 32 24267 65741 780445 608074 256 64 20544 75964 729540 1036624 256 128 25179 129885 1147398 106884 256 256 15161 118858 1607865 2061693 512 4 11801 14281 204721 253695 512 8 10920 28354 434994 84321 512 16 16204 30418 498973 421421 512 32 36188 72376 726285 600223 512 64 26294 58089 1051242 834037 512 128 28477 97136 1406520 74550 512 256 14804 62583 1316016 846530 512 512 11379 158219 1410215 1475116 1024 4 6740 5504 80051 159032 1024 8 15415 11593 413223 82996 1024 16 10941 12187 784783 502170 1024 32 16328 32328 803878 679067 1024 64 30980 49160 982648 829816 1024 128 32616 43162 1188159 822506 1024 256 31328 115354 1062110 1208894 1024 512 43344 67576 1540074 1563622 2048 4 10028 14427 132761 178894 2048 8 10286 14773 394670 101026 2048 16 18821 30292 687205 447653 2048 32 29391 15220 170679 757369 2048 64 21938 29315 513021 917551 2048 128 27359 55432 1230155 436019 2048 256 20013 25045 234487 628985 2048 512 36597 50319 1533970 1294677 4096 4 5134 5894 181375 228507 4096 8 15697 8296 81766 196084 4096 16 17834 18227 477154 472054 4096 32 33851 38089 708775 515930 4096 64 26136 76559 943803 865798 4096 128 51190 29526 616234 358797 4096 256 33914 35747 1360802 547813 4096 512 42327 54428 551949 306264 8192 4 10478 10308 248033 219836 8192 8 12960 22419 387860 270828 8192 16 17203 25970 551274 199960 8192 32 23825 39496 730051 590537 8192 64 31049 42007 303644 533157 8192 128 41739 54669 536964 591483 8192 256 47444 84550 1226922 918591 8192 512 54412 75927 1453531 560291 16384 4 9422 10615 119046 162241 16384 8 13996 18907 296333 237807 16384 16 21933 25849 389334 267865 16384 32 26480 35589 725441 489075 16384 64 38581 54610 771229 529798 16384 128 39438 60843 702245 665178 16384 256 37119 67046 991225 877040 16384 512 60475 38818 1098355 1072187 32768 4 10245 11756 252407 129994 32768 8 15724 15167 216890 281243 32768 16 14077 18777 429502 349074 32768 32 30328 28294 236356 165929 32768 64 30276 44777 572326 321886 32768 128 31137 32986 720712 980636 32768 256 28318 45225 993933 457468 32768 512 44973 74682 896794 696437 65536 4