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 Jan 30 01:55:37 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 2013 5264 135861 47269 64 8 1927 4274 256923 227718 64 16 3769 22931 114725 353294 64 32 4215 58715 47545 889431 64 64 2505 15478 306151 404998 128 4 2203 5738 116995 132370 128 8 3042 10290 251956 22667 128 16 5554 17515 335166 183620 128 32 5293 32322 652488 249034 128 64 4853 17691 785122 677178 128 128 4511 47867 955616 328199 256 4 2753 3921 22291 82526 256 8 11973 16636 259620 119679 256 16 18927 8043 333376 60336 256 32 4978 17042 608074 565185 256 64 5542 13067 318730 282875 256 128 3441 96206 641497 355566 256 256 13775 50273 457923 1707589 512 4 4071 3696 32444 18180 512 8 2649 3253 26803 34571 512 16 10480 16330 168750 351423 512 32 12621 30856 105476 104511 512 64 13696 20042 367543 671129 512 128 11291 49249 337930 468902 512 256 19196 64926 190907 465447 512 512 8655 51769 1089647 847867 1024 4 3735 5766 53612 39700 1024 8 4193 6178 80935 125952 1024 16 9588 14988 412747 395382 1024 32 13342 21754 76727 641633 1024 64 11605 31445 942952 144529 1024 128 33113 53252 819993 841357 1024 256 16509 34163 1011817 1307923 1024 512 15736 75745 1089317 1279861 2048 4 9188 9262 80611 81398 2048 8 12306 15909 115484 103293 2048 16 17475 8923 98599 62754 2048 32 31165 32331 251191 262089 2048 64 25694 10765 946360 278146 2048 128 21936 35580 1157703 443470 2048 256 15358 23710 304253 292943 2048 512 18790 71834 749113 524038 4096 4 5649 4229 30677 51245 4096 8 6710 6270 62315 33188 4096 16 10810 16173 109188 141070 4096 32 10471 11110 176902 170481 4096 64 24033 44859 414994 346915 4096 128 39992 21405 467736 274255 4096 256 17913 24714 140380 1301918 4096 512 18013 25053 1001519 388098 8192 4 3752 3200 68765 41625 8192 8 4886 4902 84082 67403 8192 16 7113 14952 112733 94480 8192 32 20299 33468 578039 379243 8192 64 21649 32522 231726 720061 8192 128 16292 24500 487242 364235 8192 256 20553 27797 552764 564766 8192 512 19084 28534 788305 887531 16384 4 4047 4524 22874 24892 16384 8 3696 5257 101520 104026 16384 16 10732 19982 344158 254599 16384 32 22270 24486 264715 241798 16384 64 21207 20266 294047 485091 16384 128 19376 34342 362261 495404 16384 256 28556 68823 810325 660543 16384 512 52898 72781 1316722 837196 32768 4