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: Sun Sep 6 23:59:28 2026 Auto Mode Machine = Linux oleg109-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-oleg109-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 4258 13308 789967 144412 64 8 2024 13090 752329 73831 64 16 5245 29466 969761 207798 64 32 4568 39407 913649 1101022 64 64 5866 13414 1526887 566551 128 4 2349 4308 499970 287587 128 8 4881 20739 743788 547377 128 16 2485 41679 934004 707520 128 32 9326 31556 589446 859260 128 64 8147 51737 103149 853794 128 128 6160 88888 1266785 1543594 256 4 5167 5618 323240 527947 256 8 4554 17862 713541 677095 256 16 7998 14427 439013 550409 256 32 10407 19414 633922 991629 256 64 12559 27098 378103 602276 256 128 9723 87042 1361224 1523457 256 256 13029 66929 1178892 1035624 512 4 9400 6302 406658 277818 512 8 9228 19781 429513 516122 512 16 16019 24197 955368 920953 512 32 17538 37619 1127995 479369 512 64 21009 54380 1130370 1086890 512 128 16983 60093 696600 990168 512 256 13288 67102 1571169 82197 512 512 10943 78407 333781 191043 1024 4 8044 10950 422616 129981 1024 8 6520 8544 576907 373579 1024 16 4829 24170 728849 249942 1024 32 16379 22230 886509 149463 1024 64 8226 18218 1361836 943781 1024 128 23092 53065 936987 910373 1024 256 20161 32677 496080 1397280 1024 512 24309 47245 1042770 521879 2048 4 5260 5547 154401 145671 2048 8 5131 6679 172333 208529 2048 16 5413 24305 863326 891552 2048 32 12908 14841 1200582 982289 2048 64 16087 33939 1245133 405457 2048 128 29155 49590 274203 336677 2048 256 17174 78281 539948 192955 2048 512 25897 43094 1561009 1403858 4096 4 5107 6086 289839 123986 4096 8 9567 13092 420798 552837 4096 16 16269 11055 543171 718828 4096 32 17464 38256 538084 871463 4096 64 22666 26839 446290 384347 4096 128 44335 35783 1020436 554353 4096 256 53862 59530 792875 1395624 4096 512 25271 53388 816580 277749 8192 4 4976 1796 317323 196852 8192 8 9968 11477 442211 392244 8192 16 20347 13197 264163 624338 8192 32 22514 19311 463952 439721 8192 64 18501 30530 496637 316931 8192 128 17841 35727 686895 320200 8192 256 27127 43078 514476 638896 8192 512 28796 45788 587408 357728 16384 4 4561 6719 372439 295782 16384 8 8749 8079 354579 201631 16384 16 12514 11482 791764 546551 16384 32 16503 19096 470018 381894 16384 64 31319 40864 814928 839344 16384 128 27937 43004 1138252 865955 16384 256 47022 37313 391370 368967 16384 512 29200 71136 838832 912854 32768 4 5621 6101 241830 417506 32768 8 9672 8137 218878 288138 32768 16 13413 22988 630396 554413 32768 32