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 Nov 13 20:08:13 2025 Auto Mode Machine = Linux oleg314-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-oleg314-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 3685 17335 306501 217743 64 8 4139 11725 426219 467002 64 16 7584 46045 889431 608965 64 32 7272 54429 831569 640954 64 64 1525 59207 778512 1163036 128 4 3973 7637 155939 215109 128 8 5122 23782 323064 387966 128 16 6725 18231 561107 448961 128 32 8600 63081 355354 581781 128 64 10722 72728 819893 1278855 128 128 7591 31403 1319723 284992 256 4 7018 2532 259057 244043 256 8 6823 10599 379306 392764 256 16 12944 45062 778183 537729 256 32 6333 54491 641880 757326 256 64 23270 78698 894929 836374 256 128 8623 64910 1340826 1347557 256 256 20947 18342 133271 1729594 512 4 7542 11717 288105 50713 512 8 20745 23306 439805 164623 512 16 10953 14783 740816 678122 512 32 22507 60966 954944 680702 512 64 11240 48343 1143004 1013534 512 128 31908 97062 1286067 1036527 512 256 20757 108564 1620980 733478 512 512 22064 122483 1500891 2055390 1024 4 10547 16272 218798 265353 1024 8 14764 13675 98974 426688 1024 16 12926 27949 175341 634055 1024 32 31920 70717 883409 941093 1024 64 21903 87993 1153381 1034481 1024 128 39571 101027 1456510 1210598 1024 256 29173 40092 1347311 1177088 1024 512 24493 32558 1496605 1381548 2048 4 5440 4612 280663 243722 2048 8 14479 11093 224240 301445 2048 16 32716 27532 691409 415337 2048 32 20798 32080 617811 851601 2048 64 25680 66673 1112425 985558 2048 128 30402 37697 1376414 678841 2048 256 21185 41090 1556202 1329957 2048 512 36877 58430 1773385 1460921 4096 4 8892 12421 248998 190405 4096 8 12721 18483 296614 191598 4096 16 20209 29780 639993 578781 4096 32 31238 35534 487679 540880 4096 64 61417 57865 260661 206481 4096 128 29555 42715 570308 162765 4096 256 19412 74172 1656400 754038 4096 512 25355 65482 1809206 1521580 8192 4 8711 11965 117972 78986 8192 8 12580 16811 198118 282773 8192 16 19586 28437 515379 536336 8192 32 31081 42750 942478 908223 8192 64 30465 52857 559716 794797 8192 128 4010 56053 894999 1074352 8192 256 53173 58730 1659265 499750 8192 512 41554 40746 1000376 580010 16384 4 8264 8051 242187 226523 16384 8 13243 10771 174682 195412 16384 16 18988 24500 401008 261133 16384 32 34977 25487 299788 337905 16384 64 27981 28640 1139120 1090234 16384 128 30447 42353 1204974 736323 16384 256 43247 76592 975231 751732 16384 512 53442 51853 1517461 1177957 32768 4 11959 14123 249934 212642 32768 8 20600 22830 269948 400225 32768 16 30533 33721 566478 487851 32768 32 32137 42164 560068 651802 32768 64 44510 55559 706007 776715 32768 128 40165 59907 861455 614137 32768 256 45555 60213 567901 678242 32768 512 44028 77005 1595626 1134398 65536 4 10208 8634 136271 122925 65536 8