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: Thu Aug 27 15:01:37 2026 Auto Mode Machine = Linux oleg214-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-oleg214-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 4971 9790 598110 645579 64 8 2207 9136 769584 789967 64 16 9317 47411 473593 789967 64 32 4810 36527 1232453 695778 64 64 5168 53785 1518251 1279447 128 4 11876 8687 606767 544601 128 8 4056 7299 819893 621518 128 16 11768 26750 985435 628061 128 32 6722 72719 1266785 1032829 128 64 10665 98080 1391557 1240443 128 128 4697 56788 1504659 2066432 256 4 9268 5961 237668 310976 256 8 5096 7330 792543 431082 256 16 18562 12147 469743 1057034 256 32 5817 41463 401277 621448 256 64 11445 78894 1415041 517016 256 128 22266 137275 1743637 1099237 256 256 26511 104279 1766587 445202 512 4 9779 13273 567695 201721 512 8 11451 20823 551796 514021 512 16 23745 41633 1147892 1069035 512 32 22723 16512 1426135 1051242 512 64 15210 78167 679840 1051242 512 128 12577 102072 1533034 610287 512 256 24896 45053 904277 1051242 512 512 21950 62430 1689859 1036527 1024 4 3069 6121 81815 130610 1024 8 14177 18773 395200 341689 1024 16 25933 32958 504411 853903 1024 32 19673 17012 427708 662414 1024 64 24323 45954 932714 811932 1024 128 47462 82860 1577984 866478 1024 256 32676 53724 1055584 516358 1024 512 23226 111292 275039 876737 2048 4 10331 6610 251536 310063 2048 8 9007 17581 688196 268697 2048 16 23832 28928 1113002 603615 2048 32 20405 36380 899864 1193410 2048 64 33942 47959 801538 1243511 2048 128 26775 41112 392112 447933 2048 256 18251 31035 1543340 517940 2048 512 41902 33095 1796378 319354 4096 4 4399 3453 172565 95868 4096 8 9240 14938 740166 490884 4096 16 18015 15172 597253 395787 4096 32 20399 23245 1500319 706560 4096 64 25236 31055 396738 262228 4096 128 30419 43741 462672 897645 4096 256 17180 46340 1680214 1443224 4096 512 30731 49049 1255305 1004153 8192 4 7894 7495 248710 289236 8192 8 9606 10002 364089 475259 8192 16 16130 14062 332818 354879 8192 32 14759 27840 962166 677923 8192 64 30133 35895 774499 309542 8192 128 23965 44173 651507 440527 8192 256 28028 30977 486029 749839 8192 512 31443 37027 629336 731434 16384 4 5210 5976 293204 214270 16384 8 9311 15346 575319 583229 16384 16 21073 27095 610206 635286 16384 32 21674 20635 793877 369199 16384 64 29314 35532 899283 600097 16384 128 26651 39271 1055601 820190 16384 256 40083 37998 581113 535391 16384 512 37675 109084 887059 789889 32768 4 7513 6998 242632 272905 32768 8 8845 11735 552216 406475 32768 16 17477 18461 298243 288149 32768 32 20312 34079 827931 723771 32768 64