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: Tue Sep 15 14:57:13 2026 Auto Mode Machine = Linux oleg302-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-oleg302-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 4617 8000 542506 418250 64 8 6114 30784 608965 598110 64 16 2346 7856 218452 681644 64 32 2609 52410 253048 1163036 64 64 2475 57767 1066042 1336792 128 4 3902 2800 662962 526961 128 8 5181 5657 747933 667081 128 16 4596 35060 864797 613002 128 32 7927 13701 1114289 761728 128 64 6715 75521 1172704 1183041 128 128 8834 48856 1391557 1105114 256 4 8711 13192 555248 177044 256 8 7609 9681 404452 659625 256 16 10710 35092 844929 797250 256 32 9815 14664 1040643 269459 256 64 7973 61290 1190657 299776 256 128 14385 55626 98873 1300235 256 256 10501 58486 389629 2210228 512 4 4005 9949 283353 392033 512 8 10617 6481 411884 46985 512 16 11670 31562 582478 383835 512 32 11988 19590 243318 1038532 512 64 23806 65281 1316016 376500 512 128 28777 79951 1528669 429599 512 256 29812 78637 1171691 1309596 512 512 43166 101469 937435 1947291 1024 4 6892 7234 689643 98405 1024 8 8844 10038 752868 152721 1024 16 17099 41123 209237 125291 1024 32 22634 19490 382223 495908 1024 64 26149 40530 741047 868581 1024 128 14974 31850 1514549 1324460 1024 256 29459 42233 127014 369148 1024 512 37278 103257 950044 1577984 2048 4 6766 5907 271439 303952 2048 8 8971 8495 900997 175116 2048 16 9377 17458 343957 922081 2048 32 10862 18925 694708 689356 2048 64 35376 34572 1006341 1338662 2048 128 21082 40248 242853 587313 2048 256 31991 48933 284766 723679 2048 512 23261 66392 748590 211920 4096 4 6181 8825 460230 360718 4096 8 11888 15184 316902 217836 4096 16 17878 19590 290476 792582 4096 32 1680 40353 629580 903404 4096 64 34760 33604 1432634 775306 4096 128 24342 40646 1589432 574869 4096 256 21421 46636 1661687 447406 4096 512 37083 46883 605398 346383 8192 4 5234 5168 274237 192490 8192 8 8127 10469 270568 210894 8192 16 15573 15267 593670 219967 8192 32 19059 22880 541876 489833 8192 64 27379 41979 489156 439063 8192 128 37465 40137 533546 645704 8192 256 32823 44169 565156 946710 8192 512 34782 50007 586275 758513 16384 4 7607 8113 234378 380287 16384 8 11977 15011 444769 425624 16384 16 19402 20293 561746 237054 16384 32 23117 28978 414417 377876 16384 64 29343 35414 573126 501870 16384 128 32311 53890 839734 647284 16384 256 30042 43049 874095 621407 16384 512 31284 51683 858877 743405 32768 4 7491 7271 557412 350493 32768 8 12859 11344 582657 365979 32768 16 18779 23187 521052 620125 32768 32 27053 34843 671020 507991 32768 64