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: Fri Sep 4 10:06:31 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 2564 6271 659861 842003 64 8 3712 8970 886494 809014 64 16 7256 27107 1013707 901377 64 32 4374 7096 1066042 1066042 64 64 5830 48560 1183548 1638743 128 4 4594 13677 405245 425141 128 8 7352 7637 188190 297632 128 16 5425 22464 853794 776042 128 32 11629 21595 1111981 841746 128 64 8385 41927 1266785 1155043 128 128 9989 24815 1471662 1827299 256 4 8294 8986 342741 304020 256 8 10447 20116 682691 67383 256 16 7326 34298 797843 653204 256 32 15796 51684 1066483 1098113 256 64 10638 52826 1137672 775373 256 128 19898 49043 658008 1340826 256 256 11994 11125 1052888 393917 512 4 7065 6355 472306 593915 512 8 6586 4712 548134 251232 512 16 5335 36999 248556 430201 512 32 19613 21174 543418 278430 512 64 19527 27560 375315 253575 512 128 15249 52356 1213400 581689 512 256 29023 60619 639169 632952 512 512 10475 31759 1451192 1679288 1024 4 5640 5905 92178 101256 1024 8 8865 22000 223826 679927 1024 16 19235 10795 123122 804480 1024 32 20356 33476 111387 291741 1024 64 13400 15859 1247157 814087 1024 128 36742 55345 525390 831261 1024 256 14293 24886 500007 241972 1024 512 33736 62919 1544504 986485 2048 4 4015 4830 240487 191437 2048 8 7031 6997 762478 734571 2048 16 8198 20675 679271 917943 2048 32 12857 23135 600408 331711 2048 64 17003 45964 511859 517440 2048 128 16329 20516 1363523 175058 2048 256 29223 65374 1630338 694483 2048 512 18728 43531 1019358 1433135 4096 4 3344 8239 215966 314691 4096 8 8847 7638 212042 171738 4096 16 12641 19840 698374 237833 4096 32 15153 23369 562558 417242 4096 64 20505 27229 1155430 792436 4096 128 30762 33153 395141 335408 4096 256 32003 56935 1028130 1376392 4096 512 24615 47545 589263 565912 8192 4 8264 7232 389854 143987 8192 8 14828 11721 302969 413400 8192 16 13344 28167 180631 180902 8192 32 18304 34370 349099 445537 8192 64 18729 32022 217093 316315 8192 128 23087 35688 903685 783631 8192 256 29331 34060 942478 624384 8192 512 37509 39792 746824 483362 16384 4 4886 5281 237160 245177 16384 8 8716 10912 488856 255796 16384 16 13670 14485 733329 448324 16384 32 21532 18782 547230 269686 16384 64 16853 31873 305500 334170 16384 128 25557 37044 996168 340482 16384 256 45061 38743 483532 248378 16384 512 31754 52543 897697 856500 32768 4 5499 6124 146220 172357 32768 8