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 Aug 25 18:45:51 2026 Auto Mode Machine = Linux oleg611-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-oleg611-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 2113 8994 560635 152710 64 8 1991 10661 863676 799377 64 16 2955 31356 538156 1143223 64 32 1938 40276 674790 1336792 64 64 2654 60775 1033216 1638743 128 4 4304 5092 621518 515822 128 8 5445 21989 458548 859260 128 16 8300 21164 1185654 1017175 128 32 9702 40506 1196221 1130717 128 64 9827 45021 895074 1440082 128 128 7421 64841 1663139 1487977 256 4 3723 9446 653204 371561 256 8 8387 21397 822913 839644 256 16 9731 35291 889002 329489 256 32 7520 49573 966633 1142514 256 64 17605 57539 265527 682691 256 128 8747 46597 456366 211749 256 256 18280 75675 1740810 1339154 512 4 6684 7521 267505 345265 512 8 11551 16850 667582 397843 512 16 8575 26024 689001 408903 512 32 17500 35054 1387437 158219 512 64 16360 66048 1590957 1279935 512 128 18353 27365 512549 1047141 512 256 17876 46963 720921 1209982 512 512 15890 36119 1500891 925717 1024 4 8586 10023 644424 589578 1024 8 13593 12686 907872 752340 1024 16 7783 17801 430452 838728 1024 32 26156 51711 1171629 668393 1024 64 28005 26353 511195 584762 1024 128 44947 60480 1594978 744257 1024 256 26933 49473 1769073 1176766 1024 512 14546 46462 1565902 1232130 2048 4 7670 8078 209987 295006 2048 8 9937 13192 432702 624005 2048 16 23990 15813 500118 720825 2048 32 25039 30344 880404 1088738 2048 64 33616 59052 1102856 757903 2048 128 17890 38887 1607456 676383 2048 256 40765 75266 1689998 971513 2048 512 34731 69938 271045 248093 4096 4 5625 8218 369612 344342 4096 8 11011 14721 443674 319347 4096 16 21313 28129 522124 691070 4096 32 19319 28593 1187537 591637 4096 64 37601 38643 519597 493195 4096 128 30837 52456 581229 768646 4096 256 40569 51291 930109 683917 4096 512 34453 66950 1825353 705486 8192 4 7384 6161 335738 373026 8192 8 13237 11834 498235 458088 8192 16 15866 16199 755444 359269 8192 32 19583 24643 633174 562170 8192 64 26814 42725 1155267 576865 8192 128 31431 56014 767681 563110 8192 256 32301 3389 1458157 981319 8192 512 32028 33963 520990 507463 16384 4 6851 6979 359613 189336 16384 8 10446 14517 430444 300183 16384 16 16398 17495 542298 641903 16384 32 38342 36571 554243 632759 16384 64 43122 52297 1475781 837074 16384 128 41632 88116 534096 856138 16384 256 35224 50746 992370 871170 16384 512 47928 102707 1264578 497993 32768 4 9821 5846 288636 245823 32768 8 12838 11211 303936 287421 32768 16 14056 14498 600233 488206 32768 32 15948 24465 855226 568157 32768 64 19267 26116 845867 616786 32768 128 23823 30151 518014 471965 32768 256 23212 33789 783584 855247 32768 512 32453 38141 783454 599236 65536 4