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: Tue Aug 25 18:46:38 2026 Auto Mode Machine = Linux oleg454-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-oleg454-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 2769 11841 576282 608965 64 8 4143 29560 598110 363829 64 16 7770 30724 969761 763021 64 32 3124 15884 1183548 901377 64 64 6346 85794 1124074 1553394 128 4 7181 11560 524900 592699 128 8 7521 17358 831319 805138 128 16 3772 33880 962469 866192 128 32 8615 30902 1391557 1105114 128 64 8030 58078 1093856 744820 128 128 3930 21369 1561553 955616 256 4 6713 5412 565185 568777 256 8 7484 10463 714967 451378 256 16 4715 14716 970126 79209 256 32 10569 51749 1062263 944525 256 64 15330 54945 1019886 1084800 256 128 9797 41436 1642294 1570244 256 256 8915 84574 1552085 1420658 512 4 4812 3831 322648 355613 512 8 9746 18562 180600 269317 512 16 16303 16385 564561 1017858 512 32 18469 59130 1032540 867738 512 64 13605 63389 1480200 552363 512 128 23670 36099 1500891 1034530 512 256 17811 64014 994294 626672 512 512 15433 27717 1413929 1968713 1024 4 5943 5525 332355 300898 1024 8 5961 11358 277886 518164 1024 16 12048 32492 578851 318197 1024 32 26286 46395 654341 646851 1024 64 35576 70928 723082 391454 1024 128 26410 94447 1140214 1192117 1024 256 38595 78042 1514549 1109579 1024 512 43175 73940 601636 1002839 2048 4 4274 6641 171121 250028 2048 8 7013 17192 346231 240124 2048 16 13612 12587 287559 376820 2048 32 24975 27582 1074977 973826 2048 64 15277 27769 564800 337909 2048 128 23366 29547 304167 833909 2048 256 35184 32864 968774 424261 2048 512 26117 44530 1517172 461978 4096 4 5219 6121 462050 292673 4096 8 13406 10494 390240 310988 4096 16 13615 1281 476665 793644 4096 32 13151 19789 636319 340486 4096 64 21839 27710 725354 421397 4096 128 15805 17660 332358 352134 4096 256 15491 47714 410218 484953 4096 512 34822 55394 566921 650264 8192 4 5122 8216 569956 391814 8192 8 6985 11250 220659 192757 8192 16 9654 12638 498120 634941 8192 32 11989 22332 790264 340327 8192 64 22333 19957 220600 444660 8192 128 19214 46212 791192 935371 8192 256 19348 22548 1076776 869915 8192 512 31819 51174 1140466 844617 16384 4 4855 5516 172603 219544 16384 8 7795 12723 305945 316287 16384 16 13966 27675 361104 282156 16384 32 20475 27641 461480 598086 16384 64 45350 52211 1246593 670206 16384 128 27150 41165 575179 539993 16384 256 39707 69156 1343625 613359 16384 512 27318 57381 1138252 1065685 32768 4 7422 7064 137207 125005 32768 8 11448 11191