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 Aug 19 01:02:02 2026 Auto Mode Machine = Linux oleg418-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-oleg418-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 4 937 4252 164099 561808 64 8 2376 7154 889431 852702 64 16 6325 11917 1049372 998622 64 32 3058 7988 1330167 1033216 64 64 1706 77947 1279447 1638743 128 4 2504 7894 584313 169530 128 8 3049 6446 789741 604036 128 16 4016 23473 1067750 753179 128 32 8593 27801 1254941 1093856 128 64 9203 94257 1291158 1332828 128 128 6382 106399 1618028 1939522 256 4 1917 2122 544547 131283 256 8 9184 13662 485898 280145 256 16 8759 13241 368881 265003 256 32 10367 9038 1168627 475779 256 64 15119 34821 1201314 921029 256 128 11712 34311 156961 1471270 256 256 9029 57154 1729594 2187712 512 4 9553 7477 117975 128739 512 8 7066 7054 338196 288453 512 16 23137 31422 1248678 836636 512 32 15056 46719 1227971 1323315 512 64 24830 41881 1387437 1005938 512 128 22217 65920 399695 1140576 512 256 10776 104961 1467055 1496706 512 512 16430 57067 1479181 2007358 1024 4 6520 3179 271699 280793 1024 8 12484 16845 767122 525969 1024 16 19886 28871 691420 760197 1024 32 24923 57709 564770 693765 1024 64 12682 26532 162930 327464 1024 128 49951 32998 1492445 1083546 1024 256 21101 55369 1248607 662312 1024 512 28110 80356 509739 754587 2048 4 6850 7231 85776 136915 2048 8 15429 11116 691687 683106 2048 16 11634 18872 840107 959254 2048 32 34442 25221 404197 161949 2048 64 19936 61987 376061 1083109 2048 128 9681 33872 1406616 1267362 2048 256 21385 47016 498059 929163 2048 512 19733 68187 881217 1481839 4096 4 1142 2879 335192 511613 4096 8 2939 4021 142747 202302 4096 16 6455 17864 354818 366239 4096 32 24602 31179 420870 310443 4096 64 10154 56072 331019 163297 4096 128 25875 29282 284643 823350 4096 256 16804 23119 833860 331364 4096 512 40245 41076 352618 203852 8192 4 4619 7506 385074 359014 8192 8 12184 7407 128930 231858 8192 16 12121 10427 312922 427759 8192 32 32376 42453 1364629 731824 8192 64 27857 36577 407159 178985 8192 128 13848 30289 655309 511741 8192 256 45564 80168 1054050 722514 8192 512 35943 32641 1111397 1372643 16384 4 6960 8012 289668 208211 16384 8 14218 13987 633640 425724 16384 16 12913 14971 319251 320006 16384 32 27202 30213 335310 319680 16384 64 21429 35803 448116 518908 16384 128 25315 41409 1035121 752737 16384 256 38881 48384 687099 437011 16384 512 27923 39188 623538 383691 32768 4