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: Tue Sep 8 08:18:51 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 3172 5555 598110 520419 64 8 4108 3705 610350 512471 64 16 7904 41052 818885 388021 64 32 7974 38624 1210227 955947 64 64 2652 12754 1562436 1722886 128 4 2016 5804 124022 83823 128 8 6802 9827 895074 576780 128 16 8913 14921 1175271 292285 128 32 6468 61218 1421023 800337 128 64 11571 65013 962469 201921 128 128 4982 82801 1436229 1997245 256 4 5748 10867 272053 531080 256 8 3440 6365 505812 817898 256 16 14083 27341 1163562 424436 256 32 7174 58687 1062263 594276 256 64 15516 46434 341324 688381 256 128 14236 73691 1487577 1243036 256 256 21949 56887 1572543 2114473 512 4 2232 6584 348063 258583 512 8 8192 7965 762924 390536 512 16 17566 18248 598050 738777 512 32 15273 44425 788702 733478 512 64 13309 56958 1190529 991998 512 128 12910 41021 657364 1296159 512 256 28248 95789 1476130 693675 512 512 24918 73245 1296159 2097550 1024 4 10484 11149 141161 512232 1024 8 13624 22337 562698 437779 1024 16 23667 33918 1039489 786507 1024 32 23096 38965 986485 881234 1024 64 13437 60306 703308 1003777 1024 128 32359 74128 1329791 980853 1024 256 23001 76659 1678504 919337 1024 512 53539 94962 1607514 827258 2048 4 5805 6596 226296 288933 2048 8 18166 7109 483346 780491 2048 16 19024 22683 367691 440220 2048 32 10194 24093 356979 191976 2048 64 26182 24620 721915 1291951 2048 128 14612 58028 1375312 411005 2048 256 25726 49247 1630647 755437 2048 512 20501 50486 651206 747483 4096 4 4539 5389 300626 259159 4096 8 7019 7228 408297 357602 4096 16 14716 14369 356422 349043 4096 32 17377 18143 427958 300028 4096 64 20648 27226 454797 271314 4096 128 30649 30479 372029 744593 4096 256 24048 65040 754767 634041 4096 512 25452 48318 669055 411072 8192 4 5602 6688 408253 283127 8192 8 6109 9125 573390 402849 8192 16 13577 16481 704630 346079 8192 32 16382 31108 580422 688629 8192 64 27168 35204 705845 624157 8192 128 32373 40495 743302 472624 8192 256 38709 59867 575927 481203 8192 512 38620 76809 1214176 928997 16384 4 5036 6310 191506 227558 16384 8 7697 10438 266025 396112 16384 16 14180 20472 432603 394595 16384 32 17115 29136 851164 727207 16384 64 21449 27784 1172551 872275 16384 128 32234 48188 749461 681025 16384 256 34278 41741 1029523 733259 16384 512 37965 51900 1242918 927540 32768 4 5316 5599 234788 179558 32768 8