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 Sep 7 22:06:38 2026 Auto Mode Machine = Linux oleg426-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-oleg426-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 3616 3469 213925 555990 64 8 5294 4590 889431 877797 64 16 4821 18957 1049372 771797 64 32 4326 58882 168424 998622 64 64 6028 54374 1518251 1562436 128 4 6272 7493 568836 239268 128 8 5616 5916 790905 640042 128 16 5557 24173 458940 985435 128 32 6116 34510 1319723 1133103 128 64 7066 49322 1377278 1332828 128 128 5865 52033 1526043 1123617 256 4 7830 12514 482839 268046 256 8 8566 23628 859127 727070 256 16 17883 41451 1137672 965763 256 32 14506 57346 1312954 565185 256 64 16550 64177 74941 1142514 256 128 13035 45912 1391207 1523457 256 256 10702 108614 1778290 1938842 512 4 9549 14226 596058 518239 512 8 17198 20515 469723 419282 512 16 8595 42021 871966 688118 512 32 26648 64818 1325766 1014013 512 64 29674 66432 908101 1245780 512 128 22149 86196 1442420 285084 512 256 10984 52491 1575781 1695195 512 512 26189 124305 798675 1038532 1024 4 6662 13317 484168 434238 1024 8 13786 8587 285877 506433 1024 16 9140 20383 135394 332896 1024 32 26390 61094 1276817 826462 1024 64 39717 47114 777537 106224 1024 128 62347 67178 1125277 1077836 1024 256 26989 84600 539243 939446 1024 512 43708 127455 1805514 429719 2048 4 6801 8857 377168 263076 2048 8 15449 15846 341836 863066 2048 16 20538 32101 598484 307224 2048 32 13773 36036 1398145 638381 2048 64 17880 29031 520987 574931 2048 128 29321 39838 845565 1068957 2048 256 16152 48419 777242 992275 2048 512 38078 63975 1654199 605743 4096 4 6100 6249 144280 161551 4096 8 8407 13508 469885 363120 4096 16 17773 17024 472873 373582 4096 32 31145 29905 927097 783295 4096 64 22758 36140 573909 407687 4096 128 33964 41749 944633 541152 4096 256 28485 1349 434451 563888 4096 512 30901 55703 500859 304080 8192 4 7653 8831 308248 134601 8192 8 10702 11782 274660 366516 8192 16 15334 17389 270890 335214 8192 32 17809 23898 351751 470399 8192 64 21490 29131 307173 820926 8192 128 29997 42736 918788 645340 8192 256 37175 41284 610928 344331 8192 512 23484 49133 1146708 517888 16384 4 5039 6040 121353 150774 16384 8 8473 9962 302550 250194 16384 16 16290 24482 505867 310845 16384 32 20759 28532 757115 678571 16384 64 27816 34041 417882 285013 16384 128 39706 43053 782202 328803 16384 256 35307 60008 645169 636298 16384 512 33123 41559 520027 488825 32768 4 6179 7899 395901 330762 32768 8 11204 13461 414133 298716 32768 16 18970 23715 417086 365592 32768 32