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 14:19:00 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 2925 8612 560635 484710 64 8 2897 30962 842003 627470 64 16 7175 44688 874936 829001 64 32 3275 42075 1232453 1017549 64 64 5507 86014 1017549 1599680 128 4 3432 3737 568836 540217 128 8 3728 15316 557032 576780 128 16 6727 51302 1032829 735635 128 32 10744 46426 1007629 40920 128 64 7720 86889 934004 1332828 128 128 15149 87798 1332828 2066432 256 4 6806 6978 439013 482189 256 8 9218 15041 847597 396389 256 16 14179 24591 466275 844929 256 32 17436 22402 673696 1019886 256 64 11739 53190 1384034 947860 256 128 7095 57462 1570244 1652404 256 256 9470 124091 1600674 1673001 512 4 8628 4236 366226 68779 512 8 15404 12731 327569 650593 512 16 13715 24847 286835 449847 512 32 8934 38589 1038532 1049187 512 64 19928 62930 1293037 1210664 512 128 22871 47810 1245780 1245780 512 256 17696 82822 187212 774480 512 512 21692 138531 1679288 1225169 1024 4 7822 3684 631723 547282 1024 8 12989 17775 771116 500240 1024 16 26024 40994 242068 908640 1024 32 25310 53782 1186518 697596 1024 64 23076 23547 568507 973296 1024 128 10421 41149 934337 1121751 1024 256 30791 45005 1261072 181814 1024 512 21434 34463 327265 1577404 2048 4 6612 7169 211852 143810 2048 8 8406 15323 323845 464501 2048 16 22021 30664 370274 519255 2048 32 22801 29382 1313685 419147 2048 64 15218 32199 776610 830522 2048 128 22901 67668 1503891 519946 2048 256 36993 33167 1599971 672570 2048 512 41689 62414 639617 964207 4096 4 5246 6219 271726 273430 4096 8 10875 18247 402869 433760 4096 16 23421 18806 649969 434352 4096 32 19704 29045 504743 336459 4096 64 25318 37412 561565 258228 4096 128 42746 2024 514570 702084 4096 256 34115 119347 1658319 1259908 4096 512 30438 51387 1031774 679266 8192 4 7742 7331 353685 268561 8192 8 11175 17180 494179 416957 8192 16 16799 17755 443988 357293 8192 32 18574 27589 754598 727793 8192 64 28039 55488 755228 599407 8192 128 33876 51404 568025 267162 8192 256 49091 56523 633957 622912 8192 512 43644 49699 1116670 1054309 16384 4 6932 8687 358551 218031 16384 8 13978 15130 505008 542963 16384 16 22513 26059 813991 508758 16384 32 29578 28731 345392 197991 16384 64 24742 31745 365341 276312 16384 128 34318 62346 669064 505120 16384 256 42059 53466 1334856 586314 16384 512 32343 51401 1477494 926490 32768 4 6308 6728 213782 304207 32768 8 10113 13574 325421 281209 32768 16 18648 24560 668286 460489 32768 32 26463 29166 527554 808009 32768 64 21027 30432 432625 409379 32768 128 36786 57401 1058429 507670 32768 256