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: Wed Oct 22 09:59:20 2025 Auto Mode Machine = Linux oleg439-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-oleg439-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 11668 25326 217039 340306 64 8 14231 34406 653436 484710 64 16 18833 55122 1124074 415659 64 32 19110 93277 1279447 760859 64 64 16749 76743 1124074 1828508 128 4 12528 20401 256409 328199 128 8 14117 29170 435487 356533 128 16 20805 42751 684081 399812 128 32 26682 77809 811221 1316487 128 64 33951 89139 1057236 1093856 128 128 32744 94191 1123617 2286447 256 4 20306 17850 290608 310257 256 8 23887 36555 582983 412215 256 16 29654 66527 792543 856386 256 32 41741 90551 721210 1062263 256 64 44990 95632 1123389 880256 256 128 56439 147800 1332507 1272498 256 256 58633 111885 2118645 3316006 512 4 18612 21418 265685 235294 512 8 29347 31704 658170 467575 512 16 53162 69696 628322 577932 512 32 53045 98328 917412 844865 512 64 80754 106222 1103647 1368865 512 128 68075 172560 1303238 1677976 512 256 92800 125614 2063289 2198475 512 512 70388 152967 2800557 2275345 1024 4 18357 19149 491594 445037 1024 8 37561 41323 801328 667044 1024 16 52637 70319 1185209 944612 1024 32 70914 90403 1521524 1066594 1024 64 86479 91946 1172909 1098792 1024 128 93574 144369 1838751 1242826 1024 256 95746 171697 1918418 1834824 1024 512 78180 186690 2730767 2852271 2048 4 20666 23439 299720 378197 2048 8 34941 39555 592948 487515 2048 16 54065 55664 878962 730138 2048 32 68069 93858 931783 1137768 2048 64 103257 121457 1692329 1472440 2048 128 76287 128047 1833573 1264935 2048 256 82397 170537 1908532 1347270 2048 512 83646 172085 2311106 2233585 4096 4 21176 23116 388247 318530 4096 8 40497 39124 630921 666770 4096 16 56065 69198 856176 958761 4096 32 76897 88283 1461891 1203004 4096 64 97370 106359 1665070 1547344 4096 128 111065 137685 1756308 1376392 4096 256 102682 176225 1997936 2009622 4096 512 114078 201881 2145658 2037749 8192 4 19628 23171 372973 394545 8192 8 37326 41495 702153 709636 8192 16 63104 64213 1136204 882947 8192 32 68002 81705 1192764 1261055 8192 64 91069 144762 1714146 1506688 8192 128 114550 145773 1712352 1424958 8192 256 106432 156592 2158030 1278035 8192 512 110831 158122 2072884 1789401 16384 4 20180 19933 409076 376081 16384 8 35670 37332 445845 597868 16384 16 51615 57385 1104480 979666 16384 32 75894 98827 1229025 1059426 16384 64 92227 107946 1660139 1315235 16384 128 102077 136707 1974651 1654782 16384 256 92845 149457 2029469 1833262 16384 512 102230 117185 1845224 1623161 32768 4 20509 21310 431498 358566 32768 8 36439 37313 450599 417500 32768 16 50009 56115 793647 664907 32768 32 73540 95705 980846 887998 32768 64 92829 124607 1311405 1478493 32768 128 109447 142745 1626288 1384066 32768 256 105749 139326 1927863 1617465 32768 512 108703 138206 1960506 1724090 65536 4 21488 23624 454417 364908 65536 8 34559 35576 541494 440756 65536 16 45564 54376 841478 686671 65536 32 60197 72307 1010596 897977 65536 64