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 31 08:27:10 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 2756 4975 528618 400168 64 8 5239 11245 809014 309326 64 16 4807 54930 983980 789967 64 32 8503 48048 1033216 955947 64 64 5519 51564 1492919 1183548 128 4 5493 6658 612303 518312 128 8 3422 13978 101090 739689 128 16 3827 29136 887675 1040839 128 32 10856 61540 948860 1093856 128 64 9791 66322 1278855 1705404 128 128 9112 65883 1048974 1727352 256 4 2904 5737 512818 548161 256 8 5439 23167 656399 472430 256 16 7726 10122 921029 536923 256 32 6989 34585 1347557 547044 256 64 9030 16026 644965 1147398 256 128 9169 32586 1312954 526652 256 256 8686 70660 2015259 152937 512 4 7276 10110 232517 410859 512 8 7300 7532 585814 150102 512 16 6569 25686 158418 896725 512 32 10557 39222 697505 556515 512 64 28084 26161 599553 674502 512 128 21581 31583 1467055 1316016 512 256 20028 98364 1550747 1380303 512 512 22649 71877 1795846 2235086 1024 4 5219 4975 160680 209023 1024 8 9011 5600 815943 714659 1024 16 9363 13898 870694 173115 1024 32 17376 17790 279551 214954 1024 64 12405 16566 854073 761815 1024 128 32240 57892 462082 1048113 1024 256 31817 73722 1594978 901394 1024 512 11668 29193 1673273 1033237 2048 4 3244 8943 132462 164197 2048 8 7728 7879 153672 813378 2048 16 12851 8964 354885 304081 2048 32 16573 31948 664711 362218 2048 64 33556 25335 482450 409360 2048 128 35845 41088 1109981 1233688 2048 256 19328 62087 1230683 881217 2048 512 20750 34894 340818 124718 4096 4 4691 7427 223997 261861 4096 8 7900 1411 552180 498605 4096 16 8649 14375 596051 227076 4096 32 19542 22881 768749 497206 4096 64 21150 45273 798142 583559 4096 128 24889 40235 273356 719883 4096 256 36023 63321 954341 648424 4096 512 31647 50919 473851 824812 8192 4 8639 8616 393844 193572 8192 8 10493 11432 327654 277112 8192 16 21547 27810 354890 322827 8192 32 18887 37477 495977 469242 8192 64 27024 48119 855575 478116 8192 128 39090 62253 1214347 634250 8192 256 31263 38613 795810 685415 8192 512 53681 98766 602360 697365 16384 4 5997 5525 178907 249205 16384 8 8472 8942 232417 279179 16384 16 15618 18701 759324 462717 16384 32 16269 18365 898343 411782 16384 64 19449 31584 845052 537602 16384 128 31736 36577 761377 744290 16384 256 32333 48171 1417311 395480 16384 512 33248 55288 407765 936656 32768 4 7183 8163 358018 192995 32768 8 10006 16399 497698 277229 32768 16