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 Sep 10 13:30:42 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 1897 3423 529661 659861 64 8 4756 12436 688639 528618 64 16 4174 26981 901377 695778 64 32 2479 28421 1049372 1013707 64 64 6856 41235 1452528 733819 128 4 3557 8812 581781 520321 128 8 7379 20942 774922 659704 128 16 11202 28539 919605 889145 128 32 11685 8392 1024942 947186 128 64 5359 56758 1332828 1332828 128 128 5274 27216 1487977 1618028 256 4 3747 5257 351607 222638 256 8 3481 13254 731528 545654 256 16 9871 28308 663292 432471 256 32 6920 35329 1137672 1016025 256 64 18753 27199 1195962 1152323 256 128 15190 106619 1286217 1332507 256 256 6761 42335 1629830 1868008 512 4 5665 6319 162223 154497 512 8 10990 7795 311825 111131 512 16 8509 13873 1024169 737762 512 32 5646 39819 735740 670082 512 64 12126 52175 982467 820650 512 128 26605 37780 1442420 1245058 512 256 9633 38714 1455126 1030064 512 512 11879 83281 1861217 1983258 1024 4 4289 7117 550227 257866 1024 8 8518 12195 343630 103476 1024 16 7261 13758 1008727 554704 1024 32 12102 12974 1099918 980853 1024 64 36853 29171 772225 543817 1024 128 17649 46968 1338494 1062372 1024 256 52623 77745 1057663 1011817 1024 512 22571 78569 612795 381070 2048 4 6892 6102 301848 209256 2048 8 14064 16433 340036 900242 2048 16 9501 15781 1403628 871118 2048 32 20900 27447 1119675 533046 2048 64 23599 30387 335901 561550 2048 128 21759 33033 519663 282175 2048 256 31405 52276 904222 1030733 2048 512 41008 66378 381371 674577 4096 4 7051 1355 324382 315830 4096 8 9906 12960 266095 406154 4096 16 12762 13684 442805 300332 4096 32 11334 51421 647373 322041 4096 64 15404 23343 444247 340736 4096 128 32516 38900 973374 482217 4096 256 24015 31141 266318 393358 4096 512 24304 37454 380070 371145 8192 4 3874 5422 403962 384600 8192 8 12057 14402 148148 312600 8192 16 19813 42976 409948 389726 8192 32 19392 27966 626730 523849 8192 64 19982 27341 648519 445872 8192 128 35481 30173 586485 464372 8192 256 20257 42742 1178891 724509 8192 512 17017 41827 787096 695600 16384 4 5505 5903 242582 318581 16384 8 5710 11331 322901 217061 16384 16 10480 10710 319395 296468 16384 32 13455 16745 271240 430819 16384 64 17725 33859 824638 728826 16384 128 33046 40560 979791 905600 16384 256 27155 41442 1073107 726630 16384 512 39336 90592 397206 386505 32768 4 6673 6525 254015 176173 32768 8