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 24 19:33:56 2026 Auto Mode Machine = Linux oleg601-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-oleg601-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 1985 6472 592827 520419 64 8 2658 15538 760859 743988 64 16 5401 21269 969761 503814 64 32 8295 41885 1163036 983980 64 64 8495 54751 1163036 1648808 128 4 6048 3336 584313 253383 128 8 7100 11847 692017 780556 128 16 3031 11995 1048974 942199 128 32 7865 55172 233543 662962 128 64 11894 83006 1421023 1123617 128 128 14143 127741 1391557 1705404 256 4 8629 7376 497147 149259 256 8 7815 19320 445942 45077 256 16 14387 36462 323240 478536 256 32 14686 25308 1175022 1028679 256 64 7753 19999 1298662 793128 256 128 17988 109455 1391207 563997 256 256 8368 26722 180800 2081678 512 4 4149 10892 408359 258458 512 8 7823 7299 773643 303668 512 16 6844 39027 311463 550523 512 32 16752 57341 1028584 677267 512 64 9888 46494 1387437 684608 512 128 27621 58082 881269 223887 512 256 25901 64596 283990 169871 512 512 25241 73163 1829505 2049505 1024 4 5167 4316 607336 129950 1024 8 10913 14686 792457 568583 1024 16 10570 19486 416792 132369 1024 32 10127 28003 1162433 788240 1024 64 12506 14678 600627 290990 1024 128 18590 45523 467769 384103 1024 256 21314 52279 1029275 784640 1024 512 36976 63429 738372 350443 2048 4 5763 6022 274090 338335 2048 8 9027 13028 850841 323894 2048 16 11306 16835 293654 962802 2048 32 21955 15615 947300 635641 2048 64 30061 39551 1038961 341904 2048 128 25949 39915 1156456 1247303 2048 256 22541 31529 576900 1276022 2048 512 44317 52323 966050 1502575 4096 4 5002 5620 447756 346355 4096 8 13555 12003 226812 369978 4096 16 13085 18588 420716 457705 4096 32 25833 23902 691070 580915 4096 64 28162 34846 667858 553068 4096 128 61790 41904 885067 612433 4096 256 33321 72380 1059713 1688305 4096 512 29457 78541 459713 976639 8192 4 7600 9332 366598 523514 8192 8 20617 23606 619051 330965 8192 16 18487 22380 257053 674344 8192 32 21994 30692 571312 442427 8192 64 34390 28454 593188 717400 8192 128 30505 49211 533886 489393 8192 256 55163 43052 641760 595346 8192 512 53916 50037 555768 769986 16384 4 4999 6202 134302 88429 16384 8 9174 9319 659471 279758 16384 16 28875 19861 606163 577184 16384 32 31318 20892 349033 656015 16384 64 19654 31833 572706 466116 16384 128 21316 47347 706475 825639 16384 256 40224 53143 875632 305945 16384 512 34690 67928 1225146 939190 32768 4 7505 6254 235752 219078 32768 8 10625 11712 485494 372591 32768 16 12537 19384 452852 357737 32768 32