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: Fri Aug 7 00:06:11 2026 Auto Mode Machine = Linux oleg401-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-oleg401-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 2229 4181 390278 95944 64 8 3044 17906 831569 592827 64 16 2485 25973 852702 577521 64 32 2296 8858 1033216 110158 64 64 3354 47731 1017549 1828508 128 4 2735 5516 189318 592699 128 8 5753 10684 148478 771581 128 16 5341 30462 203761 228961 128 32 5132 35616 748976 1281909 128 64 7029 69043 209159 1359835 128 128 9540 30917 1521718 1085013 256 4 4727 9548 668662 499227 256 8 9250 14781 873809 755195 256 16 5654 11872 1132871 1031644 256 32 6980 32673 1413179 438296 256 64 19424 39018 1422540 244265 256 128 8679 28722 1652404 1523457 256 256 9813 65640 1422540 2223962 512 4 3606 9078 201891 429170 512 8 5433 16584 1057974 875164 512 16 15555 24860 831132 616950 512 32 18109 29520 1350783 1122687 512 64 25272 16603 1506154 182534 512 128 7720 46301 1515722 449564 512 256 20810 72457 138647 387926 512 512 19601 77365 1533034 2099600 1024 4 7019 8689 302615 228373 1024 8 12648 15979 515862 203179 1024 16 9832 18024 373189 387010 1024 32 10729 15059 664464 671948 1024 64 25451 61944 495679 870694 1024 128 28158 73859 786507 666216 1024 256 30289 27904 755251 1026078 1024 512 31901 70537 930088 1065535 2048 4 10202 9418 544949 290910 2048 8 15577 18771 406012 220810 2048 16 22223 31165 275974 296165 2048 32 13410 34723 973385 800642 2048 64 36124 51203 1256608 620803 2048 128 38427 75455 1007876 405706 2048 256 36288 78802 518502 718594 2048 512 45826 81759 1192085 467687 4096 4 5582 4512 337119 345013 4096 8 13537 14050 436116 459099 4096 16 23418 33636 244039 400269 4096 32 31995 26896 410915 635825 4096 64 26327 60181 589263 526476 4096 128 36659 64806 432200 893537 4096 256 45091 54945 832850 448926 4096 512 21327 27542 350568 533755 8192 4 8843 8663 209686 120817 8192 8 14194 13348 528036 427600 8192 16 18041 21126 566685 328864 8192 32 27457 25308 412983 319326 8192 64 2523 35613 1177881 686675 8192 128 33949 37933 736372 426734 8192 256 32542 42897 707619 658840 8192 512 32941 49696 867981 809801 16384 4 10053 8985 333883 319793 16384 8 15046 15834 605085 542119 16384 16 17956 23993 815731 596322 16384 32 27191 29181 876995 736134 16384 64 21980 34054 751255 738253 16384 128 41201 36877 1014731 1015301 16384 256 37226 44749 1021003 741623 16384 512 42393 42639 859608 707093 32768 4 7771 7443 404858 418102 32768 8 10603 11539 566567 566147 32768 16 13007 16043 849769 579452 32768 32 23308 22781 919602 762136 32768 64 19284 26601 358550 590031 32768 128 25184 31294 539008 743798 32768 256 28710 32061 735153 865916 32768 512 31400 40743 1274520 900018 65536 4