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 May 12 15:31:12 2026 Auto Mode Machine = Linux oleg226-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-oleg226-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 1559 3257 180788 615952 64 8 1511 4960 640954 901377 64 16 1393 5858 789967 789967 64 32 1307 30549 333126 1017549 64 64 1393 51278 1049372 1679761 128 4 2893 7872 646205 962469 128 8 6909 9604 809997 847059 128 16 5833 12779 1165070 919605 128 32 5949 21011 2166499 770474 128 64 6464 74681 609522 1319723 128 128 6617 41637 1622919 1878447 256 4 5955 5856 563997 427478 256 8 8768 14876 479390 192502 256 16 6412 31322 1084800 104147 256 32 14185 34033 1004618 1118707 256 64 13743 54783 1098113 663292 256 128 13295 101633 331217 1254656 256 256 17470 95914 336827 2034350 512 4 5660 4446 478515 413629 512 8 5774 4683 863551 725303 512 16 9687 17080 1077618 570107 512 32 13749 30263 293379 701378 512 64 12351 34695 1333173 1213400 512 128 21487 56202 629796 1438555 512 256 12070 47962 558977 1450212 512 512 12182 33699 1712772 2065273 1024 4 3554 6138 552634 504470 1024 8 7668 11835 364017 194864 1024 16 10870 15626 1008964 893517 1024 32 17952 19193 649787 516917 1024 64 26416 36557 1389145 1146607 1024 128 13201 37728 864212 374948 1024 256 29165 82018 1430318 1204825 1024 512 21482 40871 588851 718125 2048 4 3908 6306 669947 194678 2048 8 19294 14055 381880 350140 2048 16 10155 12517 232224 118320 2048 32 20062 27749 1263261 662813 2048 64 23380 21179 1400881 396364 2048 128 38198 60992 841094 1300361 2048 256 39126 68391 534738 1350023 2048 512 27647 57497 549657 553196 4096 4 4285 4780 503693 138224 4096 8 9189 11119 329338 346383 4096 16 18002 28013 1411911 392980 4096 32 17421 19458 1392231 489946 4096 64 10452 14991 444788 369413 4096 128 29708 22196 1237849 639089 4096 256 38765 43485 1615134 457449 4096 512 25713 51064 667858 510139 8192 4 1673 4321 221897 303293 8192 8 9514 8279 368446 538944 8192 16 19714 21975 791429 617283 8192 32 27622 25975 684609 531984 8192 64 18652 30904 572149 380933 8192 128 29479 43706 742964 816673 8192 256 27475 41568 953568 524794 8192 512 23957 39374 544970 645292 16384 4 4087 4432 187301 164328 16384 8 6418 7482 532796 151351 16384 16 10489 11924 667751 288862 16384 32 15221 22798 483817 295287 16384 64 26349 28075 820268 989726 16384 128 34221 35871 766181 662836 16384 256 25911 41384 952389 721223 16384 512 26115 34841 550646 482449 32768 4 5074 5202 283350 309619 32768 8 7185 9054 332285 315137 32768 16