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: Sun Sep 6 22:00:04 2026 Auto Mode Machine = Linux oleg638-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-oleg638-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 1862 3875 621657 561808 64 8 4263 18555 789967 703068 64 16 6309 17437 1232453 866463 64 32 3979 52155 1279447 1163036 64 64 2827 87301 1279447 1947927 128 4 5978 13796 592046 365764 128 8 11632 14892 870405 659704 128 16 8465 38006 1093856 715059 128 32 9511 75745 1111981 1254941 128 64 11013 23529 1130717 1543594 128 128 15661 87669 1377278 2035099 256 4 7245 3973 470566 304020 256 8 5685 23520 750445 596919 256 16 10711 38192 757326 548161 256 32 15797 71531 889002 521536 256 64 11306 65842 999940 1004618 256 128 19724 35610 1040643 1103757 256 256 20580 30465 1871263 1497953 512 4 3919 8221 565751 72367 512 8 7588 12178 764281 237479 512 16 7983 10238 321392 899731 512 32 15714 49588 932550 408281 512 64 18913 73957 1434711 746222 512 128 34325 63366 1339827 166564 512 256 13482 72010 182923 319385 512 512 18168 71930 678122 1023680 1024 4 5364 10318 155340 588125 1024 8 7811 8627 890369 762491 1024 16 7805 13898 820463 444622 1024 32 16511 29241 1273788 883591 1024 64 29511 45267 944819 1047091 1024 128 24938 33728 1015885 792019 1024 256 41012 54416 290086 819055 1024 512 57977 84881 1556257 982648 2048 4 8856 4311 377019 280050 2048 8 15991 13846 499623 777876 2048 16 20755 18365 614277 276944 2048 32 15683 28846 366765 595208 2048 64 24318 39350 255009 335455 2048 128 22030 25718 468095 747743 2048 256 23388 29209 1634370 677931 2048 512 27940 45515 735137 552485 4096 4 7051 5860 179044 142044 4096 8 9828 12166 317125 278618 4096 16 14357 24186 408414 385433 4096 32 19154 28714 512896 395332 4096 64 22759 30949 564332 766759 4096 128 31660 35667 1618939 493549 4096 256 30635 50253 1687642 776182 4096 512 25308 71028 621540 622576 8192 4 6163 7010 180131 265587 8192 8 9239 10827 399490 343090 8192 16 18154 19448 491507 650410 8192 32 19819 31063 292603 358999 8192 64 22886 45081 932401 733198 8192 128 28378 44068 493314 253159 8192 256 39643 60946 693228 893928 8192 512 30211 50057 1172815 899521 16384 4 6006 7075 255123 254524 16384 8 11798 14104 332603 507496 16384 16 12917 14004 287928 363766 16384 32 28176 26076 512978 264676 16384 64 26526 42702 417616 439307 16384 128 30278 40678 511858 467473 16384 256 46020 59671 913169 872597 16384 512 25908 46449 858974 634963 32768 4 5820 7778 220459 244542 32768 8 11500 13614 392083 283885 32768 16 18792 22598 653504 773794 32768 32 23618 25325 776768 522391 32768 64