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 Sep 7 22:13:29 2026 Auto Mode Machine = Linux oleg450-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-oleg450-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 1234 5009 303383 524487 64 8 3047 10408 524487 688639 64 16 2000 34651 952555 666414 64 32 2361 30246 1204796 103530 64 64 3071 15560 1124074 1768283 128 4 3232 4784 433727 243832 128 8 5774 12166 859260 189921 128 16 5310 24362 522855 809997 128 32 4112 33819 726674 692017 128 64 7303 33421 1000121 942199 128 128 5722 84655 1220700 1975201 256 4 4361 6666 573946 476624 256 8 3767 9189 755195 494172 256 16 7605 26898 1048775 181442 256 32 5948 20346 1147398 955451 256 64 11223 36565 1012194 347398 256 128 6658 67706 1126926 602276 256 256 15647 38629 937924 2097948 512 4 8300 12411 305874 233782 512 8 12125 19107 821907 161418 512 16 18255 12276 1118011 349707 512 32 8976 34133 629058 575917 512 64 10012 38585 777002 211391 512 128 8410 15309 1267097 1379416 512 256 16411 66875 1589779 448719 512 512 23767 87087 918982 1772135 1024 4 6240 8497 574669 160578 1024 8 10518 12693 459413 282010 1024 16 10279 16156 502405 371832 1024 32 22667 31953 847667 658554 1024 64 27408 53125 379253 441559 1024 128 15978 24371 231150 499019 1024 256 18973 80667 361839 1257748 1024 512 19591 59753 1087111 564473 2048 4 5868 9715 227127 190296 2048 8 10298 13260 494447 175223 2048 16 20008 21022 258259 305487 2048 32 21237 34643 385323 338122 2048 64 32068 34720 690964 1098765 2048 128 27030 35966 772559 227452 2048 256 30072 53989 793835 658494 2048 512 35681 45865 521905 389569 4096 4 6464 5792 222416 203932 4096 8 15112 15160 261709 428096 4096 16 11391 15307 256416 433859 4096 32 30385 30320 238848 784834 4096 64 42116 36711 805364 757663 4096 128 19548 30002 658514 650264 4096 256 26148 51584 710240 518280 4096 512 32539 53553 1105539 739370 8192 4 4384 5916 285058 336027 8192 8 9676 2268 464215 422048 8192 16 11477 15754 481317 457271 8192 32 21440 19393 464453 353925 8192 64 22982 43876 404442 516037 8192 128 30163 35730 748891 582439 8192 256 30052 48697 494329 495191 8192 512 31802 43700 954442 635235 16384 4 4911 6823 228625 227132 16384 8 10325 11703 368627 448151 16384 16 14219 17336 484691 453095 16384 32 16485 23352 459293 512209 16384 64 19568 27359 637609 580642 16384 128 20436 38700 1023497 833490 16384 256 23879 37660 446758 360174 16384 512 25811 39631 869912 806738 32768 4 5366 5148 140902 268407 32768 8 8945 9521 352495 264881 32768 16 16451 19686 349357 398602 32768 32 17218 20598 443649 279404 32768 64