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: Fri Sep 11 08:33:03 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 1688 8075 571375 503814 64 8 2808 9160 821391 720041 64 16 2639 16161 771797 901377 64 32 3213 56443 1279447 1083249 64 64 3690 62809 1638743 627470 128 4 3038 4126 385460 360363 128 8 2875 21055 727658 520321 128 16 5946 26391 934004 799146 128 32 5462 23289 535903 618653 128 64 6866 19747 30388 1185654 128 128 3563 81112 218791 1827299 256 4 6059 10930 610842 349206 256 8 7640 15718 812329 394496 256 16 7966 11941 782721 889002 256 32 12103 55857 1044693 1040643 256 64 14447 34024 1369908 1117543 256 128 10209 30067 1461259 1080434 256 256 12342 101595 1561112 1855098 512 4 7913 8037 408281 390820 512 8 4639 15098 594738 365727 512 16 7356 18810 908101 554217 512 32 14302 45178 915847 935801 512 64 8949 63068 1125040 1011625 512 128 14012 29614 1014013 757541 512 256 7319 31436 1357615 273955 512 512 13203 54532 753025 1931527 1024 4 4219 8256 118192 378417 1024 8 8849 11967 154590 414740 1024 16 8341 18384 643555 851870 1024 32 12286 20554 323128 524300 1024 64 22324 28270 415582 900637 1024 128 28714 52748 924084 782923 1024 256 15723 49914 1442326 1116502 1024 512 13200 45490 646559 631352 2048 4 8840 8431 393315 286753 2048 8 9411 15888 777524 553196 2048 16 19079 15580 498782 311536 2048 32 21486 35079 634046 1012390 2048 64 20669 38807 519380 1057248 2048 128 32115 57245 844567 949499 2048 256 26178 62945 706710 772837 2048 512 51713 89059 1546953 784339 4096 4 6928 9003 397591 362928 4096 8 15395 14685 426629 353984 4096 16 17176 22164 220405 246197 4096 32 20503 29784 331364 946820 4096 64 24481 33484 906216 625431 4096 128 30212 50406 803593 1374960 4096 256 29632 50617 810914 341787 4096 512 24998 51497 1355434 1165226 8192 4 6972 5888 302231 266328 8192 8 9060 10800 337675 222899 8192 16 2417 17746 849252 309049 8192 32 20699 22196 422900 667596 8192 64 23512 27260 586866 510024 8192 128 18610 51119 880865 1100751 8192 256 30589 38538 703547 501405 8192 512 29694 57824 1075327 950797 16384 4 6343 6824 231164 159236 16384 8 8202 8124 351414 319376 16384 16 13913 17936 462994 583600 16384 32 15449 19105 941507 704867 16384 64 19974 32017 740952 508269 16384 128 33754 32610 468771 451561 16384 256 22375 37195 841585 858705 16384 512 28261 36620 797082 518399 32768 4 6064 8080 263596 377463 32768 8 12568 12387 371612 313878 32768 16 16694 27028 813547 732048 32768 32 30525 24390 512728 435141 32768 64 30564 41823 528609 413596 32768 128 27838 56239 726096 432888 32768 256 27111 35668 468998 612795 32768 512