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: Sat Aug 22 06:56:45 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 2940 12185 301678 470274 64 8 4034 17443 639427 666414 64 16 3904 8961 874936 718114 64 32 2493 5878 1083249 877797 64 64 3626 14722 1163036 1638743 128 4 3137 4086 153663 58129 128 8 4775 12942 466923 681476 128 16 3704 21028 678033 767171 128 32 4973 33358 841746 940549 128 64 3530 64911 1057236 1332828 128 128 5199 55411 1642783 1975201 256 4 3174 8093 286728 324903 256 8 8171 9737 343179 317599 256 16 9791 27826 465466 924200 256 32 8252 19860 1398455 1071806 256 64 7064 39209 1319408 410325 256 128 13205 27738 1347557 1045710 256 256 15822 39269 359977 1814348 512 4 6723 13564 378157 251232 512 8 9152 13382 508905 209739 512 16 8069 22953 606667 346435 512 32 16048 28791 216114 543006 512 64 18635 31486 1218910 699322 512 128 20886 45722 1657257 1455126 512 256 25001 71130 1463057 1599251 512 512 25679 98292 1672748 2024389 1024 4 7253 10005 348538 411442 1024 8 7935 8508 379823 452301 1024 16 9747 21957 996094 575593 1024 32 12590 27641 468841 260493 1024 64 30466 21713 1216426 446564 1024 128 28535 38622 586519 1113030 1024 256 16541 89879 365721 498788 1024 512 28733 47612 1473500 1416169 2048 4 6138 6092 589854 252186 2048 8 9370 13681 262530 718293 2048 16 28707 31486 621342 800269 2048 32 27724 47247 743086 273392 2048 64 15676 57239 631714 723923 2048 128 33204 47389 1596106 566065 2048 256 25293 42929 610609 295483 2048 512 28203 49816 1762469 1624172 4096 4 5300 7360 307047 349398 4096 8 11535 8837 449854 386892 4096 16 11798 24711 733655 541732 4096 32 17675 24950 636626 744852 4096 64 35117 31295 628405 626892 4096 128 29738 30404 591475 716580 4096 256 36025 58946 816735 907844 4096 512 33590 80294 670151 411693 8192 4 4998 5272 350113 230079 8192 8 8538 2464 281637 256720 8192 16 14436 22223 499510 562870 8192 32 22264 25095 807726 633314 8192 64 22814 30591 605470 552355 8192 128 38927 49776 869364 724509 8192 256 30328 56126 974888 546713 8192 512 37427 55088 791812 960955 16384 4 5042 6997 450218 138593 16384 8 15047 11453 356499 306019 16384 16 11708 7429 436777 320024 16384 32 9166 24222 595784 724409 16384 64 19626 20567 531774 386414 16384 128 18892 30564 397892 406872 16384 256 29396 40249 712437 583041 16384 512 34305 37477 850932 696240 32768 4 4819 5122 224079 306457 32768 8 6196 7429 258810 254158 32768 16 13106 15642