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 Jan 1 21:20:50 2026 Auto Mode Machine = Linux oleg219-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-oleg219-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 4262 10008 99060 335206 64 8 9896 22906 94260 415659 64 16 14221 64053 577521 474430 64 32 4921 12123 1310683 998622 64 64 3164 59364 1780008 158014 128 4 2929 8392 121551 174887 128 8 8188 22322 173474 383258 128 16 9328 39059 373136 649331 128 32 5538 59095 794416 673778 128 64 14179 54235 719853 308580 128 128 6737 64645 1123617 1755594 256 4 8734 13400 55493 245493 256 8 5298 7978 182088 252716 256 16 7974 28910 580461 116675 256 32 13552 59520 196915 551823 256 64 27711 32968 664935 324510 256 128 15869 111444 1019886 894929 256 256 12035 39239 1280084 2350543 512 4 5559 16405 94151 206790 512 8 8427 25190 250236 242521 512 16 11233 41781 252205 109054 512 32 22831 41697 587738 772252 512 64 22704 54042 586454 512549 512 128 18792 34147 857687 1025636 512 256 38163 71810 1500891 1387437 512 512 32321 89932 288144 803757 1024 4 7941 8133 177898 86742 1024 8 14246 17935 93326 193791 1024 16 14318 13239 266738 518477 1024 32 12342 43417 541554 288275 1024 64 32995 75432 1020956 553489 1024 128 29676 68457 1109579 1001903 1024 256 42990 43272 313826 1174192 1024 512 30563 32862 1432225 1537868 2048 4 8727 7362 63705 82041 2048 8 14171 18089 317032 382168 2048 16 20726 17885 304318 209383 2048 32 21649 22732 301540 157622 2048 64 22770 49993 1023975 636630 2048 128 34491 71656 951602 252713 2048 256 47544 75571 1366125 348111 2048 512 29312 55330 611348 448940 4096 4 6871 7274 215784 120772 4096 8 11770 12526 344170 145972 4096 16 17109 27539 404500 386996 4096 32 26980 32287 516395 798588 4096 64 24987 32173 529951 536840 4096 128 34707 53416 217593 365095 4096 256 36138 66172 552837 383592 4096 512 52097 96743 747022 999247 8192 4 10163 8956 237539 3164 8192 8 14362 15305 261257 149257 8192 16 15207 25803 347089 365370 8192 32 19402 34110 594697 452472 8192 64 37177 61455 716397 514091 8192 128 36031 52065 749087 564423 8192 256 26300 41721 851462 457783 8192 512 29831 58723 669391 462043 16384 4 5696 6959 185633 112887 16384 8 12288 15938 286453 300030 16384 16 22134 31924 283342 299224 16384 32 31730 35180 452382 387733 16384 64 31435 42618 397581 239112 16384 128 29316 40418 943730 471062 16384 256 39360 64252 607895 681586 16384 512 39805 56761 721571 418835 32768 4 7377 6587 104302 74715 32768 8 10012 10299 154386 172237 32768 16 14094 23162 234281 198566 32768 32 22924 26388 350189 246871 32768 64 18454 37469 502839 433203 32768 128