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 05:54:45 2026 Auto Mode Machine = Linux oleg248-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-oleg248-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 2313 3008 29318 203236 64 8 3821 13745 780776 743988 64 16 5325 26790 474430 852702 64 32 1457 36547 1310683 1066042 64 64 3439 52979 1526887 1638743 128 4 5666 14162 226164 262296 128 8 5500 21880 323259 723735 128 16 11219 42340 1749872 947186 128 32 7610 62017 766076 1032829 128 64 5027 55971 985435 1409828 128 128 9407 65473 1684006 2336194 256 4 4089 4689 618584 474937 256 8 4329 13816 414923 361674 256 16 14812 59352 684432 1763685 256 32 6695 9102 1260547 759469 256 64 8251 32931 1523457 931416 256 128 17364 72088 1619994 1152323 256 256 8744 52816 1572543 2000242 512 4 6983 11902 311057 94921 512 8 8601 33424 669247 669247 512 16 17554 19530 1094088 713970 512 32 14462 48393 876951 934580 512 64 11901 36149 1458090 1273861 512 128 20508 79331 788702 1467055 512 256 27473 70437 693675 1764853 512 512 27457 66954 2811557 3481620 1024 4 9100 15797 246981 219368 1024 8 22677 17403 286201 813316 1024 16 18165 29591 1096548 664464 1024 32 23131 44993 595051 1020956 1024 64 23231 48588 1889720 1157109 1024 128 21870 34062 2169388 250803 1024 256 21662 73091 440608 1630707 1024 512 29662 100956 1471481 1659694 2048 4 7849 11393 358858 189804 2048 8 8846 9444 416505 405629 2048 16 17249 22362 1041102 366295 2048 32 16740 14602 303812 542643 2048 64 16908 33905 832131 597610 2048 128 39786 47418 730138 497799 2048 256 26843 68010 418372 1262519 2048 512 39936 67013 1523901 895082 4096 4 6947 7478 218232 270022 4096 8 11295 12001 550093 204199 4096 16 14671 16377 498302 594833 4096 32 37415 33724 899667 681989 4096 64 31018 35327 1644981 1257602 4096 128 36179 46345 612695 1513137 4096 256 34953 74348 1686316 1453604 4096 512 52623 61578 1024819 1161680 8192 4 9472 10516 373399 267616 8192 8 12189 17123 453798 417337 8192 16 20566 21200 475588 613820 8192 32 22352 43683 739017 512000 8192 64 42186 31511 701007 1075092 8192 128 51133 46509 947703 453397 8192 256 34715 43921 861949 898345 8192 512 38814 2744 1266587 946606 16384 4 7008 8888 300651 223929 16384 8 11350 13106 311317 302199 16384 16 21369 32127 1296207 990211 16384 32 33042 38564 886053 914335 16384 64 31753 36364 1378779 722588 16384 128 36717 57341 1088283 393799 16384 256 40015 52460 656962 534936 16384 512 31966 55135 1369082 913618 32768 4 7430 8363 280329 315123 32768 8 15754 15825 613542 449967 32768 16 19404 24460 473464 451861 32768 32 30503 33109 623725 606701 32768 64 33302 41703 1105909 797877 32768 128 35374 45259 1346268 853266 32768 256 41151 55873 602008 568957 32768 512 39900 53312 543037 448348 65536 4 9437 10779 397996 419202 65536 8