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 Sep 7 13:42:58 2026 Auto Mode Machine = Linux oleg423-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-oleg423-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 3119 10163 582535 453587 64 8 2014 4214 104538 99243 64 16 4180 38714 874936 74424 64 32 5726 28170 1013707 801764 64 64 6640 28319 1049372 1562436 128 4 6769 11933 561107 488594 128 8 5419 17657 702889 643108 128 16 10710 36985 853794 794416 128 32 5428 67507 1306873 538051 128 64 9016 19011 600657 1185654 128 128 8301 99756 953918 1772988 256 4 2951 2653 457923 514045 256 8 8414 7978 768712 629094 256 16 5309 31454 880256 805021 256 32 17806 6831 440634 888266 256 64 11440 34192 1231629 1076103 256 128 21288 41843 1132871 1422540 256 256 25521 98158 1610276 1884399 512 4 3087 9845 407971 204467 512 8 8804 7223 480227 496091 512 16 8982 19936 1055894 796306 512 32 32149 47412 787834 532239 512 64 8931 21633 568296 625212 512 128 26807 80617 739032 1169140 512 256 13215 81166 403146 856319 512 512 32481 58339 929322 853257 1024 4 5457 13259 112354 192955 1024 8 10549 11416 801179 124485 1024 16 9490 17206 1029275 477653 1024 32 23820 34074 540396 871401 1024 64 28116 28866 1276817 89557 1024 128 19649 21577 727244 1024121 1024 256 20224 77710 490696 1314729 1024 512 15742 47517 608110 1018777 2048 4 4310 3723 372490 278606 2048 8 6716 4679 97971 796263 2048 16 21663 15793 242853 380526 2048 32 14590 15297 406416 560488 2048 64 16465 27768 621162 149938 2048 128 12903 27680 1519319 403931 2048 256 37417 69496 1611376 1120259 2048 512 20966 21609 1390225 289429 4096 4 944 5052 536404 193646 4096 8 20374 17021 294106 333765 4096 16 13482 23835 219871 326763 4096 32 10348 14324 181182 99068 4096 64 9439 19254 491544 421356 4096 128 18162 59534 512055 909237 4096 256 16105 21948 271113 305964 4096 512 25098 28005 977806 300427 8192 4 3092 5244 164352 211156 8192 8 6082 7412 228501 288856 8192 16 15197 18320 203745 228533 8192 32 22350 33102 570865 739669 8192 64 29279 34082 541799 476531 8192 128 42048 24827 553780 281183 8192 256 49824 41034 934836 914265 8192 512 47672 80703 914192 446573 16384 4 5978 7804 552821 454050 16384 8 7752 9051 487777 539819 16384 16 21745 22791 625724 418835 16384 32 32701 36672 769054 615430 16384 64 20365 29098 943562 693563 16384 128 30813 35368 666120 741992 16384 256 27253 49898 375125 748873 16384 512 33163 44715 483889 422323 32768 4