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 Aug 17 10:26:23 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 1317 6352 627470 542506 64 8 2088 9606 821391 639427 64 16 3336 16120 1183548 886494 64 32 2684 11414 1363961 500060 64 64 2753 22207 1183548 587635 128 4 3662 5138 518312 100881 128 8 1918 3179 901083 739689 128 16 1980 7688 1007629 766076 128 32 5118 34362 1152564 1102844 128 64 2211 78388 590094 447464 128 128 2708 69338 1229084 1579934 256 4 2800 5239 581719 297698 256 8 3817 5183 879535 785584 256 16 4876 15007 1066483 241789 256 32 8287 6368 1763685 1094754 256 64 7265 17719 1453348 1260547 256 128 15414 60925 1044693 1398455 256 256 14481 65689 1260547 282875 512 4 5074 5872 589999 249887 512 8 5642 3433 824431 292580 512 16 14315 21767 951558 609594 512 32 11618 20744 1236455 963945 512 64 10866 45138 1379416 336395 512 128 23406 57359 973118 776721 512 256 16551 44103 1108203 1630828 512 512 13529 37904 1723770 1985091 1024 4 8754 6130 248295 178988 1024 8 3886 20025 282567 127857 1024 16 4862 16541 1333507 387289 1024 32 9853 14542 598868 325184 1024 64 25449 39996 1109579 941299 1024 128 31207 62880 991266 1311117 1024 256 36370 52818 1556257 1199106 1024 512 23957 29741 1297649 1282920 2048 4 4227 5245 144522 197761 2048 8 16019 10697 657235 305085 2048 16 10108 17394 493850 477834 2048 32 23059 26931 502576 175552 2048 64 21947 27556 245828 238306 2048 128 15822 41599 818884 913064 2048 256 21952 59310 1785550 1732608 2048 512 29515 92904 1005870 889245 4096 4 3483 4960 260412 171058 4096 8 13409 7095 192472 318506 4096 16 10644 9225 596299 301127 4096 32 21050 22207 693413 646764 4096 64 27601 32385 399924 446778 4096 128 1668 28938 462984 475727 4096 256 28779 52727 631826 538590 4096 512 36134 44763 660438 705863 8192 4 4428 5121 266033 277657 8192 8 7123 8132 528588 400879 8192 16 12610 13253 552880 257068 8192 32 14085 17170 288509 414873 8192 64 19590 21561 482873 352054 8192 128 22844 28763 361983 306461 8192 256 27688 43937 1010497 724509 8192 512 34590 34696 1053921 846448 16384 4 4753 4198 392600 410525 16384 8 8343 7552 420879 295180 16384 16 12206 12669 794070 443191 16384 32 12078 19527 708741 511778 16384 64 20066 26901 651889 446028 16384 128 26249 41200 558877 280932 16384 256 21106 30759 824896 639948 16384 512 42303 49822 808884 1092922 32768 4 3886 4491 246977 290589 32768 8