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: Wed Sep 30 00:06:35 2026 Auto Mode Machine = Linux oleg355-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-oleg355-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 2701 7787 633392 335206 64 8 5075 11030 587635 101919 64 16 1706 23391 216165 743988 64 32 8518 35835 1033216 821391 64 64 3231 68815 1087638 1599680 128 4 4740 8199 426492 477301 128 8 4076 6744 739689 612303 128 16 7478 16501 715059 831319 128 32 8989 36383 1048974 901083 128 64 7152 14869 1152564 1123617 128 128 14588 70605 372102 1967960 256 4 3602 11307 277681 520272 256 8 11024 19195 405827 693718 256 16 14022 14397 826078 773140 256 32 17803 31056 778183 775373 256 64 6903 52053 1126926 1080434 256 128 9294 27362 393340 1354356 256 256 7028 125925 1570244 296957 512 4 8144 5395 139430 347331 512 8 6168 10033 653166 617482 512 16 23635 12534 878027 446387 512 32 9761 70718 1073846 580588 512 64 16059 36193 1185272 355849 512 128 14269 30975 971357 334457 512 256 32481 92135 1022219 1279935 512 512 26046 97154 1523247 810124 1024 4 5947 5508 232087 166285 1024 8 7975 5224 433187 756315 1024 16 18186 21669 572066 162026 1024 32 17279 19655 668393 470382 1024 64 34357 25909 720051 562624 1024 128 10016 23799 446982 660682 1024 256 15847 52577 1058967 1270397 1024 512 12631 62388 1192117 294079 2048 4 5243 6382 138751 164549 2048 8 8245 9368 299240 317325 2048 16 10770 20193 927157 320953 2048 32 16762 32345 400859 408542 2048 64 13932 30674 386345 1066700 2048 128 19997 34653 206450 1129094 2048 256 35894 46746 637197 461779 2048 512 24045 36158 423842 517440 4096 4 4627 6350 184529 313943 4096 8 7811 1321 385684 379080 4096 16 19555 20217 1181087 138219 4096 32 22296 40998 870713 564277 4096 64 30604 31564 629073 752222 4096 128 32790 41856 584055 494686 4096 256 37750 90772 1473932 732061 4096 512 28718 49506 310679 1306075 8192 4 5633 7918 244792 149863 8192 8 9460 11433 236442 367303 8192 16 14604 24378 356903 387087 8192 32 17849 21196 447329 518944 8192 64 21135 32377 933262 746418 8192 128 27334 55131 805832 674794 8192 256 33995 40819 579179 963785 8192 512 37005 63722 470779 471917 16384 4 5828 7493 190350 170853 16384 8 9681 11449 191330 275997 16384 16 12946 20806 665204 693297 16384 32 23498 32412 655652 749289 16384 64 27164 32363 740888 605779 16384 128 39347 50883 771593 710831 16384 256 38642 46308 939396 445871 16384 512 33918 41714 1163301 791272 32768 4 6140 7166 325836 174963 32768 8 11808 14320 510699 472372 32768 16 25592 18181 498061 229506 32768 32