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 Sep 8 00:37:29 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 2469 11422 511494 432398 64 8 3383 21269 735831 115914 64 16 7364 39552 710511 1017549 64 32 6120 25609 1119387 889431 64 64 4799 88539 1101022 1392258 128 4 3171 6370 377597 21308 128 8 6332 20279 669577 652488 128 16 14553 22019 102070 836500 128 32 11953 58236 1332828 1508887 128 64 7084 62471 1243315 739689 128 128 4898 77160 992724 1778862 256 4 4992 18656 344611 375985 256 8 7527 5386 736041 675391 256 16 9328 7836 629094 996229 256 32 8261 40777 944525 934659 256 64 12450 85674 996229 1071806 256 128 31261 73288 1243036 1445521 256 256 11966 65405 1497953 1572543 512 4 7686 13972 414587 272219 512 8 10802 13501 281755 384384 512 16 7635 30525 760762 768658 512 32 10907 44452 537299 475337 512 64 11087 51670 1017858 228874 512 128 19789 20280 1108203 1147892 512 256 26610 83674 964378 1325766 512 512 29819 154775 1127995 1783912 1024 4 6419 7019 138660 291168 1024 8 12039 29499 436666 723691 1024 16 20667 51336 944612 877454 1024 32 25056 28355 606993 623651 1024 64 33299 65523 1022171 1088213 1024 128 31985 97301 791289 328416 1024 256 11819 114478 1336827 401256 1024 512 51333 108039 977282 1464956 2048 4 3673 6438 264559 198814 2048 8 8494 14780 428729 295696 2048 16 15389 12185 472005 410907 2048 32 24905 38281 270508 593809 2048 64 27740 41865 600073 910644 2048 128 19276 49228 1239027 331980 2048 256 20416 77852 641001 234455 2048 512 33507 53938 961078 1364390 4096 4 4653 7178 346530 222439 4096 8 12297 14664 437560 222985 4096 16 15019 15390 656075 242452 4096 32 13171 27300 453704 631803 4096 64 28467 32930 839196 754038 4096 128 29892 45275 404300 565894 4096 256 27152 37191 720758 443044 4096 512 27013 67110 689572 484967 8192 4 5735 7117 223867 193677 8192 8 13288 11691 363008 422069 8192 16 17417 20526 583894 504157 8192 32 26244 24834 685743 547671 8192 64 26189 47455 965356 784221 8192 128 21527 37684 477943 559488 8192 256 24043 45311 1120494 1009220 8192 512 38849 52421 557653 316379 16384 4 5587 7794 247627 248551 16384 8 13413 15919 376211 217320 16384 16 16865 20641 597977 433865 16384 32 17829 24604 570391 480217 16384 64 30849 54543 645545 501163 16384 128 25574 41923 931867 650575 16384 256 32693 56574 934363 851291 16384 512 41291 48493 325311 269811 32768 4 5667 7754 193705 137566 32768 8 12416 12751 152882 171915 32768 16 17131 31551 694371 416112 32768 32 19786 25222 482271 457156 32768 64