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 Jul 14 11:56:31 2026 Auto Mode Machine = Linux oleg334-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-oleg334-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 3257 1955 645579 166233 64 8 4334 13504 842003 842003 64 16 5305 38136 1210227 913649 64 32 5266 53252 1255511 983980 64 64 5138 50469 987600 1638743 128 4 2020 3372 561107 498114 128 8 4268 14720 895074 695603 128 16 3174 14271 1032829 914904 128 32 5925 49345 147136 1185654 128 64 13381 60290 1455701 1421023 128 128 6012 45100 1561553 1732927 256 4 4657 8034 123962 610842 256 8 9082 12657 879535 738065 256 16 8762 12838 778183 386682 256 32 14591 36435 43494 1016025 256 64 13626 44810 132990 1089202 256 128 9205 47425 1581810 1413179 256 256 15370 74894 940389 2187712 512 4 9052 9368 253216 254718 512 8 8818 12017 538377 326077 512 16 13528 29667 619978 605299 512 32 10716 17235 910797 315074 512 64 15443 74354 1426135 1296159 512 128 26560 78697 1541840 785241 512 256 23193 35325 678980 751707 512 512 15200 31603 801357 2225819 1024 4 5607 4712 174565 346289 1024 8 13066 26804 819211 338378 1024 16 23234 36394 1053512 337845 1024 32 23459 16452 1264041 602649 1024 64 26842 44392 872286 1128826 1024 128 33109 73002 1551758 1338494 1024 256 13011 57569 1172909 807050 1024 512 31755 113423 1712639 1258117 2048 4 4248 7620 199687 69181 2048 8 15966 7501 608446 346580 2048 16 16717 17514 413478 954351 2048 32 14811 27350 940764 1095262 2048 64 22942 27785 1423162 751801 2048 128 32998 44098 1556202 1363523 2048 256 16746 55040 1618968 714351 2048 512 18798 36819 1373553 1244953 4096 4 6127 5632 355434 280067 4096 8 10141 7761 243693 204155 4096 16 17578 36435 957212 873324 4096 32 19042 22875 421614 359172 4096 64 28571 28303 1488361 461938 4096 128 18697 28790 909815 1397441 4096 256 24146 38089 587309 872393 4096 512 23503 31537 484324 285513 8192 4 3828 6027 195489 321748 8192 8 7938 2323 514468 266449 8192 16 13929 15463 553138 274412 8192 32 21989 18521 684664 682895 8192 64 22970 28843 529819 329391 8192 128 33173 36294 671025 579512 8192 256 22274 36808 503942 832866 8192 512 30738 49829 889277 994671 16384 4 4956 5724 479610 181459 16384 8 7753 8504 412643 258499 16384 16 10175 13352 336206 848872 16384 32 16462 19487 416187 610634 16384 64 27683 35991 587914 540511 16384 128 23762 29956 557621 318884 16384 256 30362 40582 986628 535791 16384 512 29984 39002 1047843 784820 32768 4 5363 5571 291384 236280 32768 8 7623 8227 229310 249252 32768 16 12310 20744 896964 564596 32768 32