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: Tue Apr 14 13:38:38 2026 Auto Mode Machine = Linux oleg420-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-oleg420-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 2494 13649 152018 435202 64 8 6896 30770 725882 488236 64 16 10059 25868 942521 124517 64 32 12733 31037 1226821 842003 64 64 14839 91435 1188789 1638743 128 4 6175 4642 574312 348661 128 8 4628 26086 707520 673778 128 16 15837 18748 934004 706589 128 32 7338 56513 104149 493989 128 64 12838 43493 976473 1155043 128 128 24324 72522 669577 1858934 256 4 3739 13389 519266 345498 256 8 11543 23614 375328 442268 256 16 12628 37998 814795 559005 256 32 19500 44421 1089202 859127 256 64 26288 37932 666586 406288 256 128 23666 53701 1286217 1243036 256 256 34972 61480 1036624 1938842 512 4 10171 11915 521385 89763 512 8 12575 17035 768934 458785 512 16 16353 31137 622133 796306 512 32 22371 33786 130381 893368 512 64 41672 76935 657969 739795 512 128 23216 62468 899731 1160923 512 256 21793 84740 1187895 1635797 512 512 47045 57393 1662389 545766 1024 4 13514 10912 579163 270042 1024 8 10299 15745 335392 232363 1024 16 16225 21912 915028 762491 1024 32 17565 31043 484387 537555 1024 64 36849 50386 659768 750107 1024 128 24632 99060 1333093 746976 1024 256 43689 32691 481023 1406431 1024 512 20990 45085 226494 643652 2048 4 8591 12622 416102 256969 2048 8 10869 12001 869267 744696 2048 16 20136 26681 356416 332520 2048 32 19946 27446 493141 660215 2048 64 36471 29238 931379 311536 2048 128 58101 34439 423675 225157 2048 256 25353 72321 1466909 177916 2048 512 29365 74028 302998 1467911 4096 4 8130 7572 283712 224266 4096 8 13237 16252 355552 445989 4096 16 20864 29911 723429 569760 4096 32 29001 25191 365873 942508 4096 64 28087 40320 1019407 457096 4096 128 28234 64319 877114 1035380 4096 256 35976 44014 1643565 565819 4096 512 34776 43880 976861 394832 8192 4 6850 7305 316905 179770 8192 8 11825 24898 772896 269712 8192 16 21794 27292 538876 595656 8192 32 31063 22938 382391 457905 8192 64 31188 47732 623432 405162 8192 128 35340 47437 1018404 519234 8192 256 31670 69108 743639 693410 8192 512 43709 49337 602889 749283 16384 4 7249 6873 179434 199355 16384 8 9994 15195 271150 192116 16384 16 17872 20995 480469 201011 16384 32 16712 22773 453990 351601 16384 64 24011 33754 387100 579965 16384 128 30408 44947 487213 436625 16384 256 32054 52522 797119 531979 16384 512 40268 52347 765635 508502 32768 4 6535 7328 332750 210620 32768 8 15996 16634 374333 332198 32768 16 20605 20903 473841 305483 32768 32 30674 34971 878165 506107 32768 64 30470 57564 674127 557706 32768 128