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: Mon Aug 10 18:37:47 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 3260 4619 376589 315507 64 8 3540 22192 323102 821391 64 16 4393 33145 1083249 24980 64 32 5068 56242 491815 1105556 64 64 6406 68604 1304314 1638743 128 4 6449 10036 177254 561694 128 8 8037 22053 441576 533241 128 16 6824 9779 841746 1074159 128 32 2665 18801 1539168 962469 128 64 10325 67405 669577 1406136 128 128 9461 91292 1521718 1705404 256 4 5728 9753 163560 299108 256 8 9881 21042 431775 145045 256 16 9345 23387 1053922 720726 256 32 10037 56938 1300235 449112 256 64 7912 56179 771473 864661 256 128 11140 60994 198737 98918 256 256 14516 52306 951219 1523457 512 4 10006 11809 339963 239572 512 8 10598 22452 932550 793657 512 16 18219 36055 1026126 571472 512 32 23000 59617 1391032 988345 512 64 24392 37607 702295 805264 512 128 22743 72902 1261144 1326585 512 256 21902 92369 1422357 348063 512 512 23915 111304 1630828 397549 1024 4 10938 13723 636027 438763 1024 8 13846 18677 757382 219502 1024 16 25984 34502 1003777 859026 1024 32 25855 55366 1227903 1000037 1024 64 13383 74051 1242826 1099918 1024 128 26714 39662 1687075 1136593 1024 256 42700 57521 1360111 1171629 1024 512 46003 104970 1428415 1331440 2048 4 11950 10612 533907 552307 2048 8 11096 18937 480749 525802 2048 16 28426 19571 1122162 1175124 2048 32 34202 44494 794422 583166 2048 64 36368 61775 622874 667293 2048 128 43512 71821 1237420 770756 2048 256 47172 77649 577715 554124 2048 512 41518 48702 997112 509824 4096 4 10764 14008 415335 318182 4096 8 15533 21022 635237 453907 4096 16 23238 20812 356889 938134 4096 32 25533 39432 1413421 1005387 4096 64 50160 47046 410669 1039829 4096 128 47685 88055 742309 524051 4096 256 42134 82876 1554485 1291252 4096 512 61491 78855 1360802 877876 8192 4 7077 6974 163525 276954 8192 8 7617 22099 478922 506461 8192 16 18105 31212 1002916 880752 8192 32 29236 22093 1130894 766243 8192 64 28351 23472 736151 474786 8192 128 29474 65810 1434955 569711 8192 256 35333 45779 678928 1177356 8192 512 41091 58038 893346 515449 16384 4 3390 9081 453534 447611 16384 8 12540 9148 676913 438567 16384 16 19971 21337 1019610 746052 16384 32 26511 24547 666992 615012 16384 64 23764 34374 1210941 826304 16384 128 29928 67806 1309046 1206646 16384 256 26273 36891 678792 344405 16384 512 28427 48017 964892 833996 32768 4 7544 7434 171807 146307 32768 8 11296 11748 894203 611160 32768 16 17072 17577 1018399 899824 32768 32 20969 36225 1245552 1016028 32768 64 28083 36253 890674 1078317 32768 128 32485 37437 992096 716567 32768 256 27912 53249 1544053 1208575 32768 512 37252 51165 1385364 1455060 65536 4