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: Mon Aug 31 17:50:23 2026 Auto Mode Machine = Linux oleg218-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-oleg218-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 3846 10930 266620 175355 64 8 5641 17881 435202 659861 64 16 6778 26938 760859 818885 64 32 4504 9356 1066042 1049372 64 64 8361 15447 1452528 1562436 128 4 2960 10900 554157 322482 128 8 8426 24695 646205 311445 128 16 8070 34859 895074 63147 128 32 7165 59284 934004 753179 128 64 11488 14970 447464 1032829 128 128 8995 48595 1111981 482881 256 4 3196 6094 557554 548161 256 8 7695 14667 454050 320825 256 16 13715 35256 810490 167646 256 32 13646 33229 992545 414123 256 64 14439 104532 727070 913973 256 128 16079 138981 1007446 349775 256 256 10160 24900 1696795 1384034 512 4 4266 6376 356262 289621 512 8 6068 8764 545766 132260 512 16 23539 8223 934580 595397 512 32 13339 45150 446758 156433 512 64 25670 23546 1442420 1011625 512 128 10773 36858 1005938 302428 512 256 18307 78456 263630 364424 512 512 33143 168195 2014892 3140488 1024 4 7227 5139 172393 116816 1024 8 4740 4435 741559 163239 1024 16 14098 12909 251597 804330 1024 32 17869 22547 1075407 523469 1024 64 30595 48565 976172 483950 1024 128 27304 43988 881234 321388 1024 256 23005 87401 1273788 1427940 1024 512 34566 44434 1350701 1158358 2048 4 6269 7055 196679 263885 2048 8 10721 16375 559539 244505 2048 16 14067 15659 466620 180124 2048 32 11828 15547 1208861 477276 2048 64 20694 32967 280050 982739 2048 128 22350 21184 641815 1222626 2048 256 25053 28225 886949 1178348 2048 512 26975 63081 385686 1253308 4096 4 4223 946 156772 172129 4096 8 7804 9890 314835 176711 4096 16 11615 20537 486629 526073 4096 32 18025 14629 541220 576664 4096 64 14999 21436 407600 312265 4096 128 28617 33190 923311 434825 4096 256 27040 37635 1451516 300516 4096 512 27157 30911 412662 172592 8192 4 6814 5717 216529 109102 8192 8 5351 6362 131007 141617 8192 16 12494 9856 606550 442689 8192 32 14446 17855 437816 969031 8192 64 12962 25735 424478 272521 8192 128 24176 32132 654935 416114 8192 256 26450 40172 625441 487968 8192 512 17884 42148 743382 590162 16384 4 2839 3458 173983 204139 16384 8 4248 9435 210832 243914 16384 16 11119 15577 616938 267065 16384 32 14686 20993 494445 406973 16384 64 21996 29391 978327 715926 16384 128 32674 41056 836636 750353 16384 256 26958 47562 772312 636569 16384 512 30975 42897 966725 826891 32768 4