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: Thu Aug 27 16:36:16 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 1617 1925 620221 150569 64 8 3458 14260 620221 620221 64 16 1963 12412 874936 801764 64 32 4225 54187 926260 926260 64 64 3123 37824 1484662 1526887 128 4 5318 4376 514339 455822 128 8 2206 5114 895074 649331 128 16 5704 21948 499970 814915 128 32 6927 47107 1319723 1040839 128 64 5099 53849 460120 538051 128 128 8595 76512 1206978 1939522 256 4 4259 7718 543445 342741 256 8 3428 14131 847597 557844 256 16 8148 6944 1112909 55508 256 32 9527 26219 1164824 952062 256 64 12467 35869 891956 1128110 256 128 6815 9633 1487577 1415041 256 256 11679 54655 439732 536654 512 4 3928 4806 579179 176257 512 8 3782 8441 346379 173382 512 16 8134 22651 958781 577932 512 32 14240 17003 1273861 1051242 512 64 9160 50703 1176828 941133 512 128 20641 71981 274972 1380303 512 256 18287 43600 996139 1261144 512 512 8441 27089 658978 2196227 1024 4 8659 8319 235989 322813 1024 8 9468 6182 88711 549101 1024 16 16196 16972 315555 755782 1024 32 12079 26181 559254 222851 1024 64 16721 25295 702847 378951 1024 128 18690 42146 1130312 469713 1024 256 33173 83503 999107 1363565 1024 512 30022 59507 412074 992182 2048 4 9242 10117 317278 212428 2048 8 12845 13370 295229 363567 2048 16 10170 11462 856184 589692 2048 32 10506 17727 487156 379316 2048 64 20201 26763 1121576 433532 2048 128 25604 23275 333501 485778 2048 256 14176 43091 591397 569027 2048 512 40592 53357 1671581 530281 4096 4 5035 8791 305306 369882 4096 8 13492 12522 526686 517095 4096 16 10111 14450 511110 459701 4096 32 14960 18101 929203 346244 4096 64 18503 40380 759371 840017 4096 128 20252 38809 631617 473368 4096 256 34834 37865 778256 546054 4096 512 27272 33432 845390 433301 8192 4 4345 2045 281050 238126 8192 8 10819 10938 364316 353394 8192 16 11150 16874 266979 337827 8192 32 13545 16561 391609 383304 8192 64 14161 16071 241915 277354 8192 128 19581 35163 723167 612486 8192 256 32070 37075 421898 554862 8192 512 29533 57665 680743 493314 16384 4 5306 9046 423204 451448 16384 8 12416 18788 254963 260357 16384 16 16427 27235 534774 670487 16384 32 25286 20253 350549 393269 16384 64 18654 18884 296558 558586 16384 128 20126 26008 426379 489250 16384 256 24893 30841 929485 789898 16384 512 42036 56437 1263230 907405 32768 4 9546 7915 343314 289544 32768 8 12154 9810 284827 247467 32768 16 10971 16514 714912 352936 32768 32 15477 22634 306664 404552 32768 64 12732 33514 932157 844968 32768 128