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: Wed Aug 19 07:08:21 2026 Auto Mode Machine = Linux oleg237-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-oleg237-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 2741 10197 571375 604849 64 8 4347 8232 952555 695778 64 16 3809 17737 1083249 460591 64 32 7579 53958 1279447 1083249 64 64 5110 53958 520419 192730 128 4 4224 10350 479432 564055 128 8 8062 15726 870405 771581 128 16 5788 20912 584313 731625 128 32 4746 70485 1123617 1067750 128 64 8692 50016 1421023 1377278 128 128 18176 115734 1598754 895074 256 4 6745 3975 319204 349206 256 8 3660 11927 773140 206934 256 16 11414 19213 652807 551540 256 32 13259 32499 583299 934659 256 64 7912 59055 852984 1031644 256 128 34487 60306 1506359 543445 256 256 11138 139522 809878 1219045 512 4 7785 3159 348798 482493 512 8 8132 5678 297690 797489 512 16 18828 28595 1096322 884172 512 32 26189 24157 1426135 640885 512 64 28946 50062 160154 948197 512 128 19762 53838 1537424 724081 512 256 30642 85533 549255 736750 512 512 37886 112552 632952 1795846 1024 4 8449 4456 323347 168062 1024 8 12886 15334 415904 301807 1024 16 14099 11951 821719 413382 1024 32 27289 33915 573365 1161176 1024 64 31325 54551 392923 920717 1024 128 17936 70348 1617808 1225101 1024 256 34450 79807 533350 528884 1024 512 43959 61835 406150 1162119 2048 4 3983 4583 292614 264730 2048 8 7195 10802 949919 146013 2048 16 11376 14841 746638 201377 2048 32 20454 26665 1249662 600576 2048 64 28017 48053 1105837 791932 2048 128 27536 41523 1005870 515206 2048 256 27688 46140 375306 438266 2048 512 25417 75775 351228 636394 4096 4 5545 6871 358977 310561 4096 8 10421 11605 477287 360241 4096 16 16688 14358 132009 419934 4096 32 22678 26668 505426 568816 4096 64 26249 51481 1022744 847183 4096 128 22889 35387 1487846 589708 4096 256 1265 42629 1206806 637594 4096 512 36084 47563 729884 364282 8192 4 4358 5059 195247 161839 8192 8 6353 7571 539231 466117 8192 16 11455 18200 528686 496185 8192 32 18453 20419 360483 570790 8192 64 21220 31415 756342 600581 8192 128 29056 45387 940311 738938 8192 256 33179 45445 551761 736893 8192 512 29823 53521 512030 509230 16384 4 5526 7224 275180 146670 16384 8 10045 12713 584206 681701 16384 16 13881 18486 686098 382321 16384 32 16791 22602 286558 319115 16384 64 18151 30288 418149 478448 16384 128 29526 45674 650593 407328 16384 256 39584 58691 989071 769812 16384 512 52241 53455 1677156 868758 32768 4 5747 6166 506805 451405 32768 8 10620 10454 642749 525710 32768 16 13811 20065 775375 418503 32768 32