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 24 11:05:53 2025 Auto Mode Machine = Linux oleg450-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-oleg450-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 3898 18028 587635 520419 64 8 4534 23375 571375 542506 64 16 5302 33400 695778 760859 64 32 7892 56886 1002351 929467 64 64 4635 70718 1285575 1780008 128 4 5417 19016 568836 597981 128 8 12122 35875 680612 432679 128 16 7027 46013 978253 864797 128 32 6382 38027 1057236 646205 128 64 10234 85915 1336145 1266785 128 128 16729 94890 940549 1967960 256 4 7890 15326 608074 557844 256 8 13857 34247 847597 697776 256 16 9134 44833 1023775 861885 256 32 13910 79331 1157291 257565 256 64 24406 86079 1487577 1099237 256 128 21303 108154 1356067 1398455 256 256 13664 44842 1579483 2223962 512 4 11915 10925 595232 643960 512 8 6738 34777 832420 58972 512 16 14035 32960 861818 932550 512 32 18156 78002 1184618 565156 512 64 24610 86767 1358474 924521 512 128 26232 103349 1296159 1355045 512 256 23837 100510 1589779 1497750 512 512 41177 129656 1479181 1840480 1024 4 8144 7948 692758 245555 1024 8 8161 18409 915223 686886 1024 16 25829 29300 961529 131926 1024 32 21579 28761 1203474 986485 1024 64 44930 74623 1324868 1182272 1024 128 26859 87896 1488307 1253344 1024 256 45950 100029 218065 1542286 1024 512 47874 73353 1506051 825668 2048 4 9173 11429 458672 531956 2048 8 7833 15610 814999 720341 2048 16 32940 36760 394290 889245 2048 32 32960 40142 1101724 992734 2048 64 45954 47696 1062216 1168888 2048 128 46501 60150 1118509 1201758 2048 256 36010 101516 906607 1391351 2048 512 35775 89836 605018 816937 4096 4 9547 9991 194823 185851 4096 8 9043 20582 247043 228992 4096 16 37119 20171 213412 267658 4096 32 18665 20894 463508 978029 4096 64 41050 50544 1156363 982672 4096 128 48484 80897 735634 514262 4096 256 61483 42600 1446384 1318303 4096 512 34162 32497 422828 486974 8192 4 7926 8276 273267 242395 8192 8 14120 21024 198970 225494 8192 16 23133 31060 909497 445866 8192 32 25323 71349 989714 1024752 8192 64 35782 45257 1184499 1026711 8192 128 34846 2618 1516731 963866 8192 256 36970 83688 1216885 1046474 8192 512 44404 67973 1433459 1293138 16384 4 10365 12382 486503 419136 16384 8 15708 16898 514414 530862 16384 16 25395 29177 838228 789590 16384 32 31610 34482 1015751 1087044 16384 64 30931 47174 1021580 1050727 16384 128 29965 41449 1197750 455781 16384 256 42457 48499 1418920 1218413 16384 512 32227 42732 1565156 1222944 32768 4 8616 8470 307147 323900 32768 8 13786 15529 316479 687088 32768 16 23091 19145 1065246 706983 32768 32 27678 27269 472937 585971 32768 64 32109 43947 728582 452582 32768 128 38665 45058 708880 1229385 32768 256 42902 45682 532631 1248301 32768 512 57912 70225 1481585 1357799 65536 4 8747 9817 311268 396397 65536 8