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 Aug 19 08:26:05 2026 Auto Mode Machine = Linux oleg131-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-oleg131-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 4 957 8235 608965 542506 64 8 4174 16170 735831 598110 64 16 4312 21895 983980 38978 64 32 4960 51288 1279447 457452 64 64 8258 66529 1357066 1143223 128 4 3748 9467 1142750 50077 128 8 4213 13449 535368 785122 128 16 5336 22057 1102844 914904 128 32 8504 43567 597981 1196221 128 64 8536 40312 1827299 1684006 128 128 7085 60121 2377579 1939522 256 4 4059 5822 605332 335984 256 8 8801 14360 770920 697322 256 16 8758 13453 1019886 743688 256 32 13781 41967 1053922 1023775 256 64 6641 44183 505812 759469 256 128 7825 101672 572721 1581810 256 256 8650 78554 735537 641497 512 4 7445 7204 239706 554074 512 8 8004 14160 834037 326921 512 16 15021 30084 669247 903136 512 32 12644 36671 992456 751707 512 64 15171 49150 1429934 730484 512 128 18377 42549 449941 1316016 512 256 17492 77493 1372364 1657257 512 512 16071 88044 859060 2198475 1024 4 8561 6927 277492 213958 1024 8 10335 14782 418131 750631 1024 16 20225 21611 628212 922497 1024 32 19144 36579 972635 504708 1024 64 9455 30791 893517 1201790 1024 128 34268 26361 321315 198603 1024 256 27441 54421 428092 452301 1024 512 18552 76060 517166 199851 2048 4 5145 7034 597277 180761 2048 8 12717 7633 293233 563392 2048 16 22068 20979 853292 832212 2048 32 22974 29905 668851 437507 2048 64 22664 42315 1048600 946360 2048 128 27246 71566 826765 1326465 2048 256 23441 82717 1410543 915887 2048 512 31835 70919 654929 819509 4096 4 7156 6264 293177 408462 4096 8 12005 13588 275787 234554 4096 16 22588 19732 425868 727781 4096 32 15611 25498 171150 170838 4096 64 17748 33593 404977 274975 4096 128 28545 66779 511735 757095 4096 256 35673 34479 931117 836418 4096 512 20917 45546 1077323 263645 8192 4 4742 5148 470721 430817 8192 8 13596 11652 326412 248452 8192 16 18515 15872 357903 454356 8192 32 18431 30014 340367 463370 8192 64 13317 23472 639253 457807 8192 128 33841 55351 1067808 775303 8192 256 44734 51862 719352 998893 8192 512 41327 65691 1109566 908391 16384 4 8123 7328 409796 634049 16384 8 11624 9324 219665 280399 16384 16 13122 15331 608277 589564 16384 32 17858 16683 537283 357808 16384 64 31717 34085 726246 507402 16384 128 27575 38766 972526 893937 16384 256 27573 40014 348365 632340 16384 512 29220 36298 594311 837625 32768 4 6063 6253 456588 343735 32768 8 9645 9484 489352 411601 32768 16 23102 22356 925522 506148 32768 32 18432 24931 371527 312746 32768 64 26341 62344 1142821 1111454 32768 128 32847 45298 1212905 1043735 32768 256 34660 51348 1111652 651231 32768 512 34312 44681 254720 362546 65536 4