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 May 25 01:51:11 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 3355 8092 604849 338589 64 8 2879 25377 415659 355635 64 16 2610 25590 752329 771797 64 32 1907 22503 1143223 608965 64 64 2900 40428 1049372 621657 128 4 2841 6248 147257 238842 128 8 3941 7515 809997 706589 128 16 4253 10404 395104 789741 128 32 2163 33367 927549 436904 128 64 6250 41048 1254941 1217930 128 128 6419 19903 1391557 1939522 256 4 3996 4541 426798 113830 256 8 4886 12588 799625 575175 256 16 10529 29469 525621 1361224 256 32 8530 52503 1062263 934659 256 64 11844 43294 1267990 1112909 256 128 10359 41191 666586 1437779 256 256 8073 47618 907792 1911233 512 4 3340 4249 559560 581216 512 8 9524 12330 536762 722133 512 16 8999 12051 736750 477557 512 32 10521 26443 444079 157257 512 64 10218 34314 704137 946526 512 128 16843 38956 689222 650593 512 256 11310 40570 1289156 1001715 512 512 13507 45804 812884 1293037 1024 4 7356 6143 441378 107835 1024 8 6298 11703 234431 853224 1024 16 9929 17577 633681 545822 1024 32 9417 23536 794363 465286 1024 64 23141 25872 973296 471001 1024 128 17899 44357 699870 633681 1024 256 26553 62910 855433 1316341 1024 512 11533 56146 1571057 804933 2048 4 5808 3672 285590 105551 2048 8 8971 9233 243059 258781 2048 16 6590 26454 558484 140120 2048 32 11684 16222 902986 1036454 2048 64 20314 23640 1063794 683596 2048 128 24890 62525 929666 733755 2048 256 35711 44020 323126 528682 2048 512 26383 90069 913064 479729 4096 4 5692 5701 255281 244508 4096 8 7771 9640 196095 209171 4096 16 23659 18881 611888 252976 4096 32 15551 28137 490253 731157 4096 64 26014 32799 771234 516644 4096 128 33093 38369 414404 529886 4096 256 23797 47972 587169 618274 4096 512 34612 78616 880485 783474 8192 4 5544 2189 341701 371164 8192 8 9649 11210 396883 315514 8192 16 16856 17603 603407 745075 8192 32 24015 22953 1073111 568053 8192 64 25190 20181 401413 413008 8192 128 26263 44540 656411 616397 8192 256 37911 41961 1033164 770781 8192 512 31859 44751 719171 706949 16384 4 5918 6712 219152 312385 16384 8 9769 10144 487227 252761 16384 16 17772 19233 595351 270764 16384 32 16733 25119 553177 619994 16384 64 26076 35731 523785 418246 16384 128 32389 40907 713243 713554 16384 256 34277 51660 1089647 847637 16384 512 42157 46161 554225 697724 32768 4 6602 6917 460173 281710 32768 8 8902 9964 354106 355779 32768 16 12579 16938 560413 475030 32768 32 22539 21010 728242 541629 32768 64 23076 33538 671833 433524 32768 128