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 Jun 1 13:42:05 2026 Auto Mode Machine = Linux oleg412-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-oleg412-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 2931 3828 512471 313664 64 8 1558 10007 576282 591520 64 16 3338 41369 19608 1033216 64 32 4045 24428 503814 1188789 64 64 4644 44356 1484662 1484662 128 4 2319 5399 488594 529038 128 8 3110 17264 162648 531131 128 16 3639 13906 687585 726674 128 32 8736 5982 1022989 969421 128 64 5420 40663 1123617 1455701 128 128 9725 42244 841746 976473 256 4 5670 8906 602614 97703 256 8 5537 9627 437582 42202 256 16 7748 17850 1076103 583299 256 32 18943 16476 861885 992545 256 64 9800 27609 1045710 1185399 256 128 16535 24525 1158540 281614 256 256 11445 114339 1639786 2015259 512 4 2805 5438 387646 495633 512 8 5531 12635 305092 322212 512 16 7613 28662 369694 771143 512 32 9198 46579 1139970 647260 512 64 8846 48771 1286838 810124 512 128 18096 48943 675563 759685 512 256 20675 56109 975328 1500891 512 512 20475 105632 908101 225960 1024 4 7210 7051 252277 456532 1024 8 9485 11302 329676 230159 1024 16 25725 19845 581437 311911 1024 32 43170 45480 145287 546447 1024 64 34838 71255 787084 724179 1024 128 21000 45511 710052 333335 1024 256 12483 40520 583491 441741 1024 512 22104 87468 1248607 1532928 2048 4 3954 13752 497194 255236 2048 8 8181 9923 428900 562801 2048 16 8495 15852 349428 168891 2048 32 22380 40580 463024 1099327 2048 64 24326 38941 1370703 454907 2048 128 18594 35114 1407538 365968 2048 256 24100 58209 678841 1009772 2048 512 28118 80430 608619 775208 4096 4 8564 5044 429627 285950 4096 8 12326 11041 295634 322543 4096 16 15889 16473 304987 348717 4096 32 28640 31516 375887 380778 4096 64 24784 32797 455218 482271 4096 128 23351 27361 1526718 300337 4096 256 19997 25436 272161 631896 4096 512 21679 59968 715207 384889 8192 4 4594 6583 416089 474648 8192 8 9647 9703 775530 573467 8192 16 25678 12580 178825 432956 8192 32 21319 33732 239029 158275 8192 64 17464 30894 420875 383052 8192 128 16081 22818 501105 627783 8192 256 31138 85490 710810 272575 8192 512 51787 78047 693004 489630 16384 4 8841 5700 332812 300607 16384 8 4647 5927 429247 283729 16384 16 9345 15442 499346 601579 16384 32 15692 17041 760458 547885 16384 64 26223 37202 865050 781046 16384 128 26402 28584 248216 406499 16384 256 64356 46122 653899 410368 16384 512 37755 45301 467044 514348 32768 4 9762 6375 201696 242005 32768 8