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: Fri Oct 2 01:59:54 2026 Auto Mode Machine = Linux oleg643-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-oleg643-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 4 920 5440 106699 603489 64 8 1293 12645 157273 720041 64 16 4455 27456 889431 720041 64 32 4889 17334 969761 754443 64 64 2405 49915 496362 1484662 128 4 2186 8531 423798 332467 128 8 4393 9478 109771 692017 128 16 4366 23678 659704 859260 128 32 5769 33263 969421 857887 128 64 7224 42467 1165070 1220700 128 128 8547 34178 1391557 753179 256 4 2737 9985 616807 348752 256 8 4270 11359 789628 488551 256 16 7293 11872 209518 352647 256 32 8348 40251 1089202 613985 256 64 8189 31515 122310 1112909 256 128 13395 38811 668662 1354356 256 256 11601 33260 215143 1304976 512 4 3560 10056 532239 480764 512 8 12310 20957 348063 484890 512 16 7905 9096 276744 113324 512 32 19743 45853 490875 604447 512 64 17677 37457 510964 555938 512 128 16590 37402 712076 791318 512 256 17043 82405 820650 793951 512 512 27786 47310 514021 1985091 1024 4 8203 10718 173171 162179 1024 8 11034 13417 911920 247994 1024 16 7606 11268 504708 791289 1024 32 14195 20826 606650 951728 1024 64 14337 49323 575285 949204 1024 128 25219 51866 518227 321291 1024 256 31930 42127 1054547 304395 1024 512 11341 39518 725647 448944 2048 4 5087 6714 219037 262530 2048 8 8189 12009 414996 365905 2048 16 11397 8063 206078 416687 2048 32 23721 29962 328263 978485 2048 64 15990 43030 1252577 849411 2048 128 34800 35335 895455 1259557 2048 256 27252 31035 473071 666257 2048 512 44076 81821 457037 471564 4096 4 6822 7236 181270 445515 4096 8 9147 21936 486174 366505 4096 16 24476 29778 435001 427787 4096 32 25964 31119 510913 592351 4096 64 26891 34500 570801 536840 4096 128 41241 42709 907988 610431 4096 256 60395 46699 375402 744464 4096 512 26427 60952 720486 1112771 8192 4 5198 7488 193531 178719 8192 8 9012 9355 450679 321720 8192 16 2557 19650 574637 661555 8192 32 36932 37037 975690 440787 8192 64 28729 26969 765117 438520 8192 128 21621 32740 791501 461292 8192 256 33503 31359 693354 566256 8192 512 21840 66560 893532 326427 16384 4 5589 6241 224552 203307 16384 8 10171 16978 373654 451947 16384 16 15516 16631 392046 300101 16384 32 17515 23912 514961 613973 16384 64 27737 40394 722717 353927 16384 128 26253 29464 437420 632952 16384 256 22839 43361 1012235 561517 16384 512 29397 51154 524440 427424 32768 4 6206 6337 191632 201597 32768 8 10719 14273 322091 313581 32768 16 16256 16565 592197 284192 32768 32 15641 25700 521343 425602 32768 64 19851 29893 628548 541215 32768 128 26749 31406 624201 508173 32768 256