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: Sat Aug 15 16:37:36 2026 Auto Mode Machine = Linux oleg655-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-oleg655-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 4 911 9809 503814 538156 64 8 3999 10057 821391 603489 64 16 4160 18088 500060 763021 64 32 4607 29386 1105556 477808 64 64 5477 30710 780776 1892980 128 4 2042 4684 305421 383258 128 8 6837 13452 115535 395104 128 16 2334 23121 595328 576780 128 32 7177 48103 251956 209895 128 64 6677 44961 479432 1391557 128 128 11108 51509 1436229 2066432 256 4 7169 6478 448362 486559 256 8 4179 14187 955451 778183 256 16 5469 12137 1312954 927393 256 32 11168 23688 1112909 1163562 256 64 14987 35412 1319408 1384034 256 128 17391 47452 1340826 713067 256 256 15479 110822 785010 2065659 512 4 5038 4699 547017 500018 512 8 10489 14305 761841 502005 512 16 8806 15952 235191 1005938 512 32 14454 23142 1233614 1152822 512 64 9956 38363 1343179 1120344 512 128 12028 60455 1580419 1514652 512 256 19320 31297 1760512 1924603 512 512 13314 86238 1791352 1975959 1024 4 7722 10940 292995 360836 1024 8 11556 15295 868581 169756 1024 16 7283 34365 665803 667562 1024 32 23553 37886 798053 1019987 1024 64 27392 46040 1554004 813933 1024 128 26178 47252 316136 979064 1024 256 31209 95709 870694 1309518 1024 512 34350 103508 1695735 1759651 2048 4 8078 6893 398146 407167 2048 8 8834 11408 285713 426218 2048 16 18419 26630 1039590 482911 2048 32 21323 27916 1222626 1026545 2048 64 27105 50224 869619 868828 2048 128 28674 44888 246039 1284033 2048 256 36653 40585 1065510 403305 2048 512 42132 44836 446977 158585 4096 4 6558 7573 433716 166024 4096 8 13988 15313 290025 622102 4096 16 16835 19524 451343 407156 4096 32 22985 26863 506425 467367 4096 64 34875 44349 1553782 473851 4096 128 44939 58411 470683 487623 4096 256 46906 53962 466466 612717 4096 512 45801 43931 520715 493025 8192 4 5241 5946 216222 324256 8192 8 9788 8195 473523 283794 8192 16 13804 2597 332779 833108 8192 32 17971 25119 514862 439766 8192 64 19241 38934 536227 383180 8192 128 29405 47493 301010 385813 8192 256 30727 35772 1248591 755710 8192 512 44568 72126 830490 1092838 16384 4 5106 5695 330409 285758 16384 8 13269 9443 394357 506946 16384 16 17175 23214 592098 272335 16384 32 24168 30561 665339 664130 16384 64 32992 35677 1003617 590415 16384 128 37318 50403 727137 513718 16384 256 36219 40743 965855 755052 16384 512 27788 50337 512817 443374 32768 4 6146 7288 252514 195318 32768 8 10740 10497 557953 552654 32768 16 16904 21501 633210 590341 32768 32 22720 24191 579083 415811 32768 64 26338 33387 1036400 576566 32768 128 33832 42014 1065659 1005362 32768 256 34604 48034 934013 962546 32768 512 37074 54888 676200 637138 65536 4